《深入理解Java虚拟机》- Java虚拟机是如何加载Java类的?

Java虚拟机是如何加载Java类的？这个问题也就是面试常问到的Java类加载机制。在年初面试百战之后，菜鸟喜鹊也是能把这流程倒背如流啊！但是，也只是字面上的背诵，根本就是像上学时背书考试一样。

tonight ！我们把它映射到实战里，看看如何用代码说明这个流程。

ready! go! ----------------在这之前还是搞点理论吧，不然又要先去百度加载机制流程了。

一、类加载机制（理论部分）

类加载机制有三大过程：加载、链接、初始化。其中链接又细分为验证、准备及解析。

Java语言的类型分为两大类：基本类型和引用类型。Java的基本类型是由Java虚拟机预先定义好的。而引用类型又分为：数组类、类、接口、泛型参数。在JVM中，只存在数组类、类、接口三类，而数组类是直接由Java虚拟机直接生成的，其他两类则有字节流而来。

字节流又是怎么来呢？最常见的还是从字节码文件而来（还可以从网络等而来）。所以，我就以字节码文件分析一下加载机制。

1.加载

加载是指查找字节流，并据此创建类的过程。对于数组类来说，它们是可以由Java虚拟机直接生成。而其他两类，却需要借助类加载器，Java虚拟机才能完成查找字节流的工作。

类加载器与类的关系就像是UI与效果图一样，需要将业务需求翻译成效果图。美丽的UI就是类加载器，效果图就是类。

类加载器有一个模型：双亲委派。

双亲委派模型是每次收到类加载请求时，先将请求委派给父类加载器完成，如果父类加载器无法完成加载，那么子类尝试自己加载

类加载器分为三种，启动类加载器、扩展类加载器、应用类加载器。

其中，

启动类加载器（Application ClassLoader）是负责加载最为基础、最为重要的类，即加载<JAVA_HOME>\lib目录下核心库

扩展类加载器的父类加载器是启动类加载器，扩展类加载器负责加载相对次要、但又通用的类，即加载<JAVA_HOME>\lib\ext目录下扩展包

应用类加载器的父类加载器是扩展类加载器，应用类加载器负责加载应用程序路径下的类，即用户路径(classpath)上指定的类库

这三者类加载器的关系可以这样描述：

每当类加载器接收到加载请求时，它会先将请求转发给父类加载器，在父类加载器中没有找到需要的类的情况下，该加载器才会尝试去加载。

比如，应用加载器接收到加载请求，会先去找父类加载器（扩展类加载器）里有没有需要的类，但该扩展类加载器顶头还有父类加载器（启动类加载器），所以还要去启动类加载器中查找是否存在需要的类，如果不存在，那扩展类加载器就会自己加载需要的类，然后把引用传递给应用加载器。

类加载器还有一个功能，就是提供命名空间的作用。

在Java虚拟机中，类的唯一性是由类加载器实例以及类的全名一同确定的。即便是同一串字节流，经过不同的类加载器加载，也会得到两个不同的类。（这里可以读者自己实现一下，用两个扩展类加载器加载同一个类，然后打印一下类信息就可以验证了）

2.链接

链接：将创建成的类合并至Java虚拟机中，使之能够执行的过程。（这里是下面代码要验证一个步骤）

链接分为验证、准备、解析。

验证的目的是为了让被加载的类能够满足Java虚拟机的约束。（关于约束条件，今天暂时不讲。）

准备的目的是为了被加载类的静态字段分配内存。（仅仅是分配内存，并没有在内存中写东西）除此之外，有些Java虚拟机还会用来实现虚方法的动态绑定的方法表。

下一步就是我们链接的重要步骤--解析

对于一个方法的调用，编译器会解析一个符号，这个符号能够无歧义地定位到具体的目标上。这个符号包含目标方法所在类的名字、目标方法的名字、接收的参数类型以及返回值类型的符号引用。

如果符号引用指向一个未被加载的类、字段、方法，那么这个解析将触发加载功能。

3.初始化

初始化：为标记为常量值的字段赋值，以及执行<clinit>方法的过程。

只有初始化完成之后，类才正式成为可执行的状态。

那初始化这个步骤是什么时候执行呢？

JVM规范枚举了下述多种触发初始化的情况：

理论部分讲解完了。（参考链接：https://time.geekbang.org/column/article/11523）

二、类加载机制（Linux查看字节码）

在这，主要是因为网上都是一大串的理论描述，看得也是半信半疑。还不如拿出代码来，让自己也心服口服了。

talk is cheap,show the code!

1.classloader

输出如下：

结果很惊人，为什么父类加载器的父类加载器（我自己取名为爷爷类加载器。。），照理论来说，应该打印的是bootstrapClassLoader。其实是它隐身了。贴一下代码里的一段注释：

* Returns the parent class loader for delegation. Some implementations may
* use <tt>null</tt> to represent the bootstrap class loader. This method
* will return <tt>null</tt> in such implementations if this class loader's
* parent is the bootstrap class loader.

翻译黄色的句子就是：如果父类加载器是启动类加载器，则将返回null

但还是没解决怎么找bootstrapClassLoader啊。

它实际上不是 java.lang.ClassLoader的子类，而是由JVM自身实现的，我们可以通过这个方法得到实现的类路径。

URL[] urls=sun.misc.Launcher.getBootstrapClassPath().getURLs();

2.链接

3.初始化

1.编译的单例类：Singleton.java

public class Singleton{

 private Singleton(){}

 private static class LazyHolder{

    static final Singleton INSTANCE = new Singleton();

    static{

      System.out.println("LazyHolder.<clinit>");

    }

 }

 public static Object getInstance(boolean flag){

  if(flag) return new LazyHolder[2];

  return LazyHolder.INSTANCE;

 }

 public static void main(String... args){

  System.out.println("---");

  getInstance(true);

  System.out.println("---");

  getInstance(false);

 }

}

2.编译并运行

[root@localhost tmp3]# javac Singleton.java

[root@localhost tmp3]# java Singleton

---

---

LazyHolder.<clinit>

3.查看字节码文件（用的新指令：java -verbose:class Singleton）

结合2,3的输出，我想，我该讲点啥。

在两段“-----”中，如果没有打印加载信息，我们就以为是连续输出了。但是并没有。根据加载信息来看，中间还会加载Singleton$LazyHolder这个内部类，而这一步，对应的就是getInstance(true)；。说明了啥？说明了前面理论部分的链接的最后一句话：

如果符号引用指向一个未被加载的类、字段、方法，那么这个解析将触发加载功能。

这里注意的是，仅仅调用了加载功能而已，这里只完成了创建类而已，并没有让它继续进行链接和初始化功能。所以在这里，也就不会出现打印“LazyHolder.<clinit>”的字样。

当使用到了getInstance(true)的时候，由于需要使用到“LazyHolder.INSTANCE;”这个静态常量，而它又与new 构造器方法相连通，此时就满足了理论中初始化的解释：

2.当遇到用以新建目标类实例的new指令时，初始化new指令的目标类
3.当遇到访问静态字段的指令时，初始化该静态字段所在的类

在这，大家应该也有疑问：getInstance(false)的时候也有new啊。但是，false时候的new，只是new数组，数组里装的只是加载时候生成的类引用。

大家还可以看下面class字节码就知道，注释那里就标记着很清楚是类引用而已。

Singleton.class

  public static java.lang.Object getInstance(boolean);

    descriptor: (Z)Ljava/lang/Object;

    flags: ACC_PUBLIC, ACC_STATIC

    Code:

      stack=1, locals=1, args_size=1

         0: iload_0

         1: ifeq          9

         4: iconst_2

         5: anewarray     #3       // class Singleton$LazyHolder

         8: areturn

         9: getstatic     #4       // Field Singleton$LazyHolder.INSTANCE:LSingleton;

        12: areturn

      LineNumberTable:

        line 11: 0

        line 12: 9

      StackMapTable: number_of_entries = 1

        frame_type = 9 /* same */

  public static void main(java.lang.String...);

    descriptor: ([Ljava/lang/String;)V

    flags: ACC_PUBLIC, ACC_STATIC, ACC_VARARGS

    Code:

      stack=2, locals=1, args_size=1

         0: getstatic     #5                  // Field java/lang/System.out:Ljava/io/PrintStream;

         3: ldc           #6                  // String ---

         5: invokevirtual #7                  // Method java/io/PrintStream.println:(Ljava/lang/String;)V

         8: iconst_1

         9: invokestatic  #8   // Method getInstance:(Z)Ljava/lang/Object;

        12: pop

        13: getstatic     #5   // Field java/lang/System.out:Ljava/io/PrintStream;

        16: ldc           #6   // String ---

        18: invokevirtual #7   // Method java/io/PrintStream.println:(Ljava/lang/String;)V

        21: iconst_0

        22: invokestatic  #8   // Method getInstance:(Z)Ljava/lang/Object;

        25: pop

        26: return

      LineNumberTable:

        line 15: 0

        line 16: 8

        line 17: 13

        line 18: 21

        line 19: 26

  Singleton(Singleton$1);

    descriptor: (LSingleton$1;)V

    flags: ACC_SYNTHETIC

    Code:

      stack=1, locals=2, args_size=2

         0: aload_0

         1: invokespecial #1                  // Method "<init>":()V

         4: return

      LineNumberTable:

        line 1: 0

}

可以看到，在getInstance中，那么#3 和#4 对应的是啥

现在，

看了例子之后，大家应该也对类加载机制有了一点点了解了吧。

附：java -verbose:class Singleton 显示的全部信息

 [root@localhost tmp3]# java -verbose:class Singleton

 [Opened /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.Object from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.io.Serializable from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.Comparable from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.CharSequence from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.String from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.reflect.AnnotatedElement from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.reflect.GenericDeclaration from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.reflect.Type from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.Class from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.Cloneable from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.ClassLoader from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.System from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.Throwable from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.Error from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.ThreadDeath from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.Exception from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.RuntimeException from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.SecurityManager from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.security.ProtectionDomain from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.security.AccessControlContext from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.security.SecureClassLoader from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.ReflectiveOperationException from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.ClassNotFoundException from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.LinkageError from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.NoClassDefFoundError from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.ClassCastException from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.ArrayStoreException from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.VirtualMachineError from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.OutOfMemoryError from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.StackOverflowError from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.IllegalMonitorStateException from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.ref.Reference from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.ref.SoftReference from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.ref.WeakReference from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.ref.FinalReference from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.ref.PhantomReference from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.misc.Cleaner from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.ref.Finalizer from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.Runnable from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.Thread from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.Thread$UncaughtExceptionHandler from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.ThreadGroup from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.Map from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.Dictionary from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.Hashtable from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.Properties from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.reflect.AccessibleObject from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.reflect.Member from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.reflect.Field from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.reflect.Parameter from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.reflect.Executable from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.reflect.Method from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.reflect.Constructor from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.reflect.MagicAccessorImpl from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.reflect.MethodAccessor from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.reflect.MethodAccessorImpl from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.reflect.ConstructorAccessor from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.reflect.ConstructorAccessorImpl from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.reflect.DelegatingClassLoader from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.reflect.ConstantPool from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.reflect.FieldAccessor from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.reflect.FieldAccessorImpl from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.reflect.UnsafeFieldAccessorImpl from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.reflect.UnsafeStaticFieldAccessorImpl from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.annotation.Annotation from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.reflect.CallerSensitive from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.invoke.MethodHandle from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.invoke.DirectMethodHandle from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.invoke.MemberName from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.invoke.MethodHandleNatives from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.invoke.LambdaForm from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.invoke.MethodType from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.BootstrapMethodError from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.invoke.CallSite from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.invoke.ConstantCallSite from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.invoke.MutableCallSite from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.invoke.VolatileCallSite from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.Appendable from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.AbstractStringBuilder from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.StringBuffer from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.StringBuilder from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.misc.Unsafe from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.AutoCloseable from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.io.Closeable from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.io.InputStream from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.io.ByteArrayInputStream from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.io.File from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.net.URLClassLoader from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.net.URL from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.jar.Manifest from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.misc.Launcher from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.misc.Launcher$AppClassLoader from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.misc.Launcher$ExtClassLoader from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.security.CodeSource from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.StackTraceElement from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.nio.Buffer from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.Boolean from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.Character from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.Number from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.Float from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.Double from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.Byte from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.Short from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.Integer from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.Long from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.NullPointerException from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.ArithmeticException from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.io.ObjectStreamField from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.Comparator from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.String$CaseInsensitiveComparator from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.security.Guard from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.security.Permission from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.security.BasicPermission from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.RuntimePermission from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.security.AccessController from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.reflect.ReflectPermission from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.security.PrivilegedAction from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.reflect.ReflectionFactory$GetReflectionFactoryAction from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.security.cert.Certificate from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.Iterable from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.Collection from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.List from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.RandomAccess from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.AbstractCollection from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.AbstractList from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.Vector from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.Stack from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.reflect.ReflectionFactory from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.ref.Reference$Lock from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.ref.Reference$ReferenceHandler from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.InterruptedException from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.ArrayList from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.Collections from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.Set from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.AbstractSet from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.Collections$EmptySet from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.Collections$EmptyList from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.AbstractMap from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.Collections$EmptyMap from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.Collections$UnmodifiableCollection from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.Collections$UnmodifiableList from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.Collections$UnmodifiableRandomAccessList from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.ref.ReferenceQueue from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.ref.ReferenceQueue$Null from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.ref.ReferenceQueue$Lock from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.misc.JavaLangRefAccess from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.ref.Reference$1 from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.misc.SharedSecrets from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.IncompatibleClassChangeError from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.NoSuchMethodError from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.reflect.Reflection from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.HashMap from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.Map$Entry from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.HashMap$Node from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.misc.VM from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.Hashtable$Entry from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.Math from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.ref.Finalizer$FinalizerThread from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.nio.charset.Charset from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.nio.charset.spi.CharsetProvider from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.nio.cs.FastCharsetProvider from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.nio.cs.StandardCharsets from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.util.PreHashedMap from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.nio.cs.StandardCharsets$Aliases from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.nio.cs.StandardCharsets$Classes from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.nio.cs.StandardCharsets$Cache from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.ThreadLocal from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.concurrent.atomic.AtomicInteger from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.Class$3 from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.Class$ReflectionData from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.Class$Atomic from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.reflect.generics.repository.AbstractRepository from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.reflect.generics.repository.GenericDeclRepository from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.reflect.generics.repository.ClassRepository from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.Class$AnnotationData from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.reflect.annotation.AnnotationType from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.WeakHashMap from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.ClassValue$ClassValueMap from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.reflect.Modifier from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.reflect.LangReflectAccess from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.reflect.ReflectAccess from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.Arrays from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.nio.cs.HistoricallyNamedCharset from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.nio.cs.Unicode from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.nio.cs.UTF_8 from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.Class$1 from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.reflect.ReflectionFactory$1 from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.reflect.NativeConstructorAccessorImpl from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.reflect.DelegatingConstructorAccessorImpl from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.StringCoding from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.ThreadLocal$ThreadLocalMap from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.ThreadLocal$ThreadLocalMap$Entry from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.StringCoding$StringDecoder from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.nio.cs.ArrayDecoder from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.nio.charset.CharsetDecoder from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.nio.cs.UTF_8$Decoder from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.nio.charset.CodingErrorAction from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.Hashtable$EntrySet from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.Collections$SynchronizedCollection from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.Collections$SynchronizedSet from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.Objects from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.Enumeration from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.Iterator from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.Hashtable$Enumerator from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.Runtime from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.misc.Version from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.io.FileInputStream from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.io.FileDescriptor from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.misc.JavaIOFileDescriptorAccess from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.io.FileDescriptor$1 from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.io.Flushable from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.io.OutputStream from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.io.FileOutputStream from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.io.FilterInputStream from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.io.BufferedInputStream from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.concurrent.atomic.AtomicReferenceFieldUpdater from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.concurrent.atomic.AtomicReferenceFieldUpdater$AtomicReferenceFieldUpdaterImpl from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.security.PrivilegedExceptionAction from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.concurrent.atomic.AtomicReferenceFieldUpdater$AtomicReferenceFieldUpdaterImpl$1 from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.reflect.misc.ReflectUtil from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.io.FilterOutputStream from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.io.PrintStream from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.io.BufferedOutputStream from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.io.Writer from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.io.OutputStreamWriter from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.nio.cs.StreamEncoder from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.security.action.GetPropertyAction from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.nio.cs.ArrayEncoder from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.nio.charset.CharsetEncoder from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.nio.cs.UTF_8$Encoder from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.nio.ByteBuffer from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.nio.HeapByteBuffer from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.nio.Bits from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.nio.ByteOrder from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.concurrent.atomic.AtomicLong from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.misc.JavaNioAccess from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.nio.Bits$1 from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.io.BufferedWriter from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.io.DefaultFileSystem from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.io.FileSystem from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.io.UnixFileSystem from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.io.ExpiringCache from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.LinkedHashMap from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.io.ExpiringCache$1 from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.Enum from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.io.File$PathStatus from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.nio.file.Watchable from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.nio.file.Path from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.StringCoding$StringEncoder from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.ClassLoader$3 from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.io.ExpiringCache$Entry from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.LinkedHashMap$Entry from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.ClassLoader$NativeLibrary from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.Terminator from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.misc.SignalHandler from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.Terminator$1 from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.misc.Signal from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.misc.NativeSignalHandler from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.Integer$IntegerCache from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.misc.OSEnvironment from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.misc.JavaLangAccess from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.System$2 from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.IllegalArgumentException from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.Compiler from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.Compiler$1 from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.net.URLStreamHandlerFactory from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.misc.Launcher$Factory from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.security.util.Debug from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.ClassLoader$ParallelLoaders from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.WeakHashMap$Entry from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.Collections$SetFromMap from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.WeakHashMap$KeySet from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.misc.JavaNetAccess from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.net.URLClassLoader$7 from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.StringTokenizer from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.misc.Launcher$ExtClassLoader$1 from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.misc.MetaIndex from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.Readable from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.io.Reader from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.io.BufferedReader from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.io.InputStreamReader from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.io.FileReader from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.nio.cs.StreamDecoder from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.nio.CharBuffer from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.nio.HeapCharBuffer from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.nio.charset.CoderResult from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.nio.charset.CoderResult$Cache from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.nio.charset.CoderResult$1 from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.nio.charset.CoderResult$2 from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.reflect.Array from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.HashMap$TreeNode from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.io.FileInputStream$1 from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.net.www.ParseUtil from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.BitSet from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.Locale from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.util.locale.LocaleObjectCache from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.Locale$Cache from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.concurrent.ConcurrentMap from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.concurrent.ConcurrentHashMap from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.concurrent.locks.Lock from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.concurrent.locks.ReentrantLock from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.concurrent.ConcurrentHashMap$Segment from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.concurrent.ConcurrentHashMap$Node from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.concurrent.ConcurrentHashMap$CounterCell from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.concurrent.ConcurrentHashMap$CollectionView from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.concurrent.ConcurrentHashMap$KeySetView from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.concurrent.ConcurrentHashMap$ValuesView from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.concurrent.ConcurrentHashMap$EntrySetView from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.util.locale.BaseLocale from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.util.locale.BaseLocale$Cache from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.util.locale.BaseLocale$Key from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.util.locale.LocaleObjectCache$CacheEntry from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.Locale$LocaleKey from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.util.locale.LocaleUtils from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.CharacterData from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.CharacterDataLatin1 from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.net.Parts from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.net.URLStreamHandler from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.net.www.protocol.file.Handler from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.misc.JavaSecurityAccess from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.security.ProtectionDomain$JavaSecurityAccessImpl from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.misc.JavaSecurityProtectionDomainAccess from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.security.ProtectionDomain$2 from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.security.ProtectionDomain$Key from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.security.Principal from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.HashSet from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.misc.URLClassPath from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.net.www.protocol.jar.Handler from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.misc.Launcher$AppClassLoader$1 from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.SystemClassLoaderAction from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.invoke.MethodHandleImpl from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.invoke.MethodHandleImpl$1 from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.function.Function from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.invoke.MethodHandleImpl$2 from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.invoke.MethodHandleImpl$3 from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.ClassValue from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.invoke.MethodHandleImpl$4 from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.ClassValue$Entry from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.ClassValue$Identity from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.ClassValue$Version from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.invoke.MemberName$Factory from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.invoke.MethodHandleStatics from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.invoke.MethodHandleStatics$1 from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.misc.PostVMInitHook from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.usagetracker.UsageTrackerClient from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.concurrent.atomic.AtomicBoolean from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.usagetracker.UsageTrackerClient$1 from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.usagetracker.UsageTrackerClient$4 from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.usagetracker.UsageTrackerClient$3 from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.io.FileOutputStream$1 from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.launcher.LauncherHelper from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.net.URLClassLoader$1 from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.net.util.URLUtil from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.misc.URLClassPath$3 from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.misc.URLClassPath$Loader from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.misc.URLClassPath$JarLoader from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.zip.ZipConstants from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.zip.ZipFile from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.misc.JavaUtilZipFileAccess from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.util.zip.ZipFile$1 from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.misc.URLClassPath$FileLoader from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.misc.Resource from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.misc.URLClassPath$FileLoader$1 from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.nio.ByteBuffered from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.misc.PerfCounter from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.misc.Perf$GetPerfAction from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.misc.Perf from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.misc.PerfCounter$CoreCounters from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.nio.ch.DirectBuffer from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.nio.MappedByteBuffer from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.nio.DirectByteBuffer from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.nio.LongBuffer from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.nio.DirectLongBufferU from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.security.PermissionCollection from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.security.Permissions from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.net.URLConnection from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.net.www.URLConnection from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.net.www.protocol.file.FileURLConnection from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded sun.net.www.MessageHeader from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.io.FilePermission from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.io.FilePermission$1 from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.io.FilePermissionCollection from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.security.AllPermission from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.security.UnresolvedPermission from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.security.BasicPermissionCollection from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded Singleton from file:/usr/local/asmtools-7.0-build/binaries/lib/tmp3/]

 [Loaded sun.launcher.LauncherHelper$FXHelper from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.Class$MethodArray from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.Void from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 ---

 [Loaded Singleton$LazyHolder from file:/usr/local/asmtools-7.0-build/binaries/lib/tmp3/]

 ---

 LazyHolder.<clinit>

 [Loaded java.lang.Shutdown from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

 [Loaded java.lang.Shutdown$Lock from /usr/local/jdk1.8.0_111/jre/lib/rt.jar]

javap -verbose Singleton显示的全部信息

 [root@localhost tmp3]# javap -verbose Singleton

 Classfile /usr/local/asmtools-7.0-build/binaries/lib/tmp3/Singleton.class

   Last modified Aug 13, 2019; size 770 bytes

   MD5 checksum 993ff066c953984c811ff7998d1a8e10

   Compiled from "Singleton.java"

 public class Singleton

   minor version: 0

   major version: 52

   flags: ACC_PUBLIC, ACC_SUPER

 Constant pool:

    #1 = Methodref          #9.#26         // Singleton."<init>":()V

    #2 = Methodref          #10.#26        // java/lang/Object."<init>":()V

    #3 = Class              #27            // Singleton$LazyHolder

    #4 = Fieldref           #3.#28         // Singleton$LazyHolder.INSTANCE:LSingleton;

    #5 = Fieldref           #29.#30        // java/lang/System.out:Ljava/io/PrintStream;

    #6 = String             #31            // ---

    #7 = Methodref          #32.#33        // java/io/PrintStream.println:(Ljava/lang/String;)V

    #8 = Methodref          #9.#34         // Singleton.getInstance:(Z)Ljava/lang/Object;

    #9 = Class              #35            // Singleton

   #10 = Class              #36            // java/lang/Object

   #11 = Class              #37            // Singleton$1

   #12 = Utf8               InnerClasses

   #13 = Utf8               LazyHolder

   #14 = Utf8               <init>

   #15 = Utf8               ()V

   #16 = Utf8               Code

   #17 = Utf8               LineNumberTable

   #18 = Utf8               getInstance

   #19 = Utf8               (Z)Ljava/lang/Object;

   #20 = Utf8               StackMapTable

   #21 = Utf8               main

   #22 = Utf8               ([Ljava/lang/String;)V

   #23 = Utf8               (LSingleton$1;)V

   #24 = Utf8               SourceFile

   #25 = Utf8               Singleton.java

   #26 = NameAndType        #14:#15        // "<init>":()V

   #27 = Utf8               Singleton$LazyHolder

   #28 = NameAndType        #38:#39        // INSTANCE:LSingleton;

   #29 = Class              #40            // java/lang/System

   #30 = NameAndType        #41:#42        // out:Ljava/io/PrintStream;

   #31 = Utf8               ---

   #32 = Class              #43            // java/io/PrintStream

   #33 = NameAndType        #44:#45        // println:(Ljava/lang/String;)V

   #34 = NameAndType        #18:#19        // getInstance:(Z)Ljava/lang/Object;

   #35 = Utf8               Singleton

   #36 = Utf8               java/lang/Object

   #37 = Utf8               Singleton$1

   #38 = Utf8               INSTANCE

   #39 = Utf8               LSingleton;

   #40 = Utf8               java/lang/System

   #41 = Utf8               out

   #42 = Utf8               Ljava/io/PrintStream;

   #43 = Utf8               java/io/PrintStream

   #44 = Utf8               println

   #45 = Utf8               (Ljava/lang/String;)V

 {

   public static java.lang.Object getInstance(boolean);

     descriptor: (Z)Ljava/lang/Object;

     flags: ACC_PUBLIC, ACC_STATIC

     Code:

       stack=1, locals=1, args_size=1

          0: iload_0

          1: ifeq          9

          4: iconst_2

          5: anewarray     #3                  // class Singleton$LazyHolder

          8: areturn

          9: getstatic     #4                  // Field Singleton$LazyHolder.INSTANCE:LSingleton;

         12: areturn

       LineNumberTable:

         line 11: 0

         line 12: 9

       StackMapTable: number_of_entries = 1

         frame_type = 9 /* same */

   public static void main(java.lang.String...);

     descriptor: ([Ljava/lang/String;)V

     flags: ACC_PUBLIC, ACC_STATIC, ACC_VARARGS

     Code:

       stack=2, locals=1, args_size=1

          0: getstatic     #5                  // Field java/lang/System.out:Ljava/io/PrintStream;

          3: ldc           #6                  // String ---

          5: invokevirtual #7                  // Method java/io/PrintStream.println:(Ljava/lang/String;)V

          8: iconst_1

          9: invokestatic  #8                  // Method getInstance:(Z)Ljava/lang/Object;

         12: pop

         13: getstatic     #5                  // Field java/lang/System.out:Ljava/io/PrintStream;

         16: ldc           #6                  // String ---

         18: invokevirtual #7                  // Method java/io/PrintStream.println:(Ljava/lang/String;)V

         21: iconst_0

         22: invokestatic  #8                  // Method getInstance:(Z)Ljava/lang/Object;

         25: pop

         26: return

       LineNumberTable:

         line 15: 0

         line 16: 8

         line 17: 13

         line 18: 21

         line 19: 26

   Singleton(Singleton$1);

     descriptor: (LSingleton$1;)V

     flags: ACC_SYNTHETIC

     Code:

       stack=1, locals=2, args_size=2

          0: aload_0

          1: invokespecial #1                  // Method "<init>":()V

          4: return

       LineNumberTable:

         line 1: 0

 }

 SourceFile: "Singleton.java"

 InnerClasses:

      static #11; //class Singleton$1

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