Java开发工具箱-JDK的安装与配置

一、JDK、JRE

术语名	缩写	解释
Java Development Kit	JDK	Java程序员用的工具包
Java Runtime Enviroment	JRE	Java程序的运行环境

二、下载、安装JDK

官网下载链接:http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html

百度网盘下载链接：http://pan.baidu.com/s/1bLnANG

鼠标右键双击运行.exe,将会弹出引导程序安装JDK和JRE,

点击next,继续安装

点击change..选择你安装的路径，然后点击next

等待一会儿，会弹出安装jre的向导

可以选择安装路径，点击change选择安装路径，然后点击next

点击next steps去查看官网文档API等，点击close完成安装

三、环境变量配置

安装完成，cd到你的安装路径下

安装路径如下图：

那两个文件夹分别是JDK和JRE的安装位置，cd到JDK\bin中执行Java命令

F:\Java\JDK\bin>dir
 Volume in drive F has no label.
 Volume Serial Number is 692A-C80C

 Directory of F:\Java\JDK\bin

//  :    <DIR>          .
//  :    <DIR>          ..
//  :            , appletviewer.exe
//  :            , extcheck.exe
//  :            , idlj.exe
//  :            , jabswitch.exe
//  :            , jar.exe
//  :            , jarsigner.exe
//  :            , java-rmi.exe
//  :           , java.exe
//  :            , javac.exe
//  :            , javadoc.exe
//  :           , javafxpackager.exe
//  :            , javah.exe
//  :            , javap.exe
//  :           , javapackager.exe
//  :           , javaw.exe
//  :           , javaws.exe
//  :            , jcmd.exe
//  :            , jconsole.exe
//  :            , jdb.exe
//  :            , jdeps.exe
//  :            , jhat.exe
//  :            , jinfo.exe
//  :            , jjs.exe
//  :           , jli.dll
//  :            , jmap.exe
//  :           , jmc.exe
//  :                jmc.ini
//  :            , jps.exe
//  :            , jrunscript.exe
//  :            , jsadebugd.exe
//  :            , jstack.exe
//  :            , jstat.exe
//  :            , jstatd.exe
//  :           , jvisualvm.exe
//  :            , keytool.exe
//  :            , kinit.exe
//  :            , klist.exe
//  :            , ktab.exe
//  :           , msvcr100.dll
//  :            , native2ascii.exe
//  :            , orbd.exe
//  :            , pack200.exe
//  :            , policytool.exe
//  :            , rmic.exe
//  :            , rmid.exe
//  :            , rmiregistry.exe
//  :            , schemagen.exe
//  :            , serialver.exe
//  :            , servertool.exe
//  :            , tnameserv.exe
//  :           , unpack200.exe
//  :            , wsgen.exe
//  :            , wsimport.exe
//  :            , xjc.exe
               File(s)      ,, bytes
                Dir(s)  ,,, bytes free

F:\Java\JDK\bin>java -version
java version "1.8.0_111"
Java(TM) SE Runtime Environment (build 1.8.0_111-b14)
Java HotSpot(TM) -Bit Server VM (build 25.111-b14, mixed mode)

F:\Java\JDK\bin>javac
Usage: javac <options> <source files>
where possible options include:
  -g                         Generate all debugging info
  -g:none                    Generate no debugging info
  -g:{lines,vars,source}     Generate only some debugging info
  -nowarn                    Generate no warnings
  -verbose                   Output messages about what the compiler is doing
  -deprecation               Output source locations where deprecated APIs are used
  -classpath <path>          Specify where to find user class files and annotation processors
  -cp <path>                 Specify where to find user class files and annotation processors
  -sourcepath <path>         Specify where to find input source files
  -bootclasspath <path>      Override location of bootstrap class files
  -extdirs <dirs>            Override location of installed extensions
  -endorseddirs <dirs>       Override location of endorsed standards path
  -proc:{none,only}          Control whether annotation processing and/or compilation is done.
  -processor <class1>[,<class2>,<class3>...] Names of the annotation processors to run; bypasses default discovery process
  -processorpath <path>      Specify where to find annotation processors
  -parameters                Generate metadata for reflection on method parameters
  -d <directory>             Specify where to place generated class files
  -s <directory>             Specify where to place generated source files
  -h <directory>             Specify where to place generated native header files
  -implicit:{none,class}     Specify whether or not to generate class files for implicitly referenced files
  -encoding <encoding>       Specify character encoding used by source files
  -source <release>          Provide source compatibility with specified release

这样做比较麻烦，没次要用的时候，都需要到这个安装位置下来 我们需要添加安装的bin目录到系统环境变量中，

复制路径后，在系统环境变量中找到path,然后添加进去

之前安装的路径的JDK的bin路径就添加到系统环境变量中啦 F:\Java\JDK\bin

在cmd下验证一下，任意路径

C:\Windows\system32>java -version
java version "1.8.0_111"
Java(TM) SE Runtime Environment (build 1.8.0_111-b14)
Java HotSpot(TM) -Bit Server VM (build 25.111-b14, mixed mode)

C:\Windows\system32>E:

E:\>java -version
java version "1.8.0_111"
Java(TM) SE Runtime Environment (build 1.8.0_111-b14)
Java HotSpot(TM) -Bit Server VM (build 25.111-b14, mixed mode)

E:\>javac
Usage: javac <options> <source files>
where possible options include:
  -g                         Generate all debugging info
  -g:none                    Generate no debugging info
  -g:{lines,vars,source}     Generate only some debugging info
  -nowarn                    Generate no warnings
  -verbose                   Output messages about what the compiler is doing
  -deprecation               Output source locations where deprecated APIs are used
  -classpath <path>          Specify where to find user class files and annotation processors
  -cp <path>                 Specify where to find user class files and annotation processors
  -sourcepath <path>         Specify where to find input source files
  -bootclasspath <path>      Override location of bootstrap class files
  -extdirs <dirs>            Override location of installed extensions
  -endorseddirs <dirs>       Override location of endorsed standards path
  -proc:{none,only}          Control whether annotation processing and/or compilation is done.
  -processor <class1>[,<class2>,<class3>...] Names of the annotation processors to run; bypasses default discovery process
  -processorpath <path>      Specify where to find annotation processors
  -parameters                Generate metadata for reflection on method parameters
  -d <directory>             Specify where to place generated class files
  -s <directory>             Specify where to place generated source files
  -h <directory>             Specify where to place generated native header files
  -implicit:{none,class}     Specify whether or not to generate class files for implicitly referenced files
  -encoding <encoding>       Specify character encoding used by source files
  -source <release>          Provide source compatibility with specified release
  -target <release>          Generate class files for specific VM version
  -profile <profile>         Check that API used is available in the specified profile
  -version                   Version information
  -help                      Print a synopsis of standard options
  -Akey[=value]              Options to pass to annotation processors
  -X                         Print a synopsis of nonstandard options
  -J<flag>                   Pass <flag> directly to the runtime system
  -Werror                    Terminate compilation if warnings occur
  @<filename>                Read options and filenames from file

四、编写hello world程序运行一下， 创建文件HelloWorld.java， 文件名字与类名对应，文件类型.java

public class HelloWorld{
    public static void main(String[] args)
    {
         System.out.println("Hello World");
    }
}

cd到helloworld.java路径下

E:\Java>dir
 Volume in drive E has no label.
 Volume Serial Number is 35EE-5207

 Directory of E:\Java

2017/01/14  12:49    <DIR>          .
2017/01/14  12:49    <DIR>          ..
2017/01/14  12:49               130 HelloWorld.java
2016/07/12  09:18    <DIR>          httpcomponents-client-4.5.2
2016/07/12  09:17         3,047,752 httpcomponents-client-4.5.2-bin.zip
2016/07/12  08:59         1,643,553 httpcomponents-client-4.5.2-src.zip
2015/12/14  08:35    <DIR>          sqljdbc_4.2
               3 File(s)      4,691,435 bytes
               4 Dir(s)  40,363,429,888 bytes free

E:\Java>javac HelloWorld
error: Class names, 'HelloWorld', are only accepted if annotation processing is explicitly requested
1 error

E:\Java>javac HelloWorld.java

E:\Java>java HelloWorld
Hello World