reference from:https://www.voxxed.com/blog/2015/02/too-fast-too-megamorphic-what-influences-method-call-performance-in-java/ Whats this all about then? Let’s start with a short story. I proposed a change on the a Java core libs mailing list to overri…
Overview The java.lang.ref package provides more flexible types of references than are otherwise available, permitting limited interaction between the application and the Java Virtual Machine (JVM) garbage collector. It is an important package, centr…
Template Method is a behavioral design pattern and it’s used to create a method stub and deferring some of the steps of implementation to the subclasses.Template method defines the steps to execute an algorithm and it can provide default implementati…
在使用flink run命令提交任务可能会遇到如下错误: The program finished with the following exception: org.apache.flink.client.program.ProgramInvocationException: The main method caused an error: java.util.concurrent.ExecutionException: org.apache.flink.runtime.client.JobS…
reference:http://www.mathcs.emory.edu/~cheung/Courses/323/Syllabus/Map/skip-list-impl.html The link list element structure used to implement a Skip List The link list element used to implement the skip list has 4 links (not including the data portion…
String is an immutable class in Java. An immutable class is simply a class whose instances cannot be modified. All information in an instance is initialized when the instance is created and the information can not be modified. There are many advantag…
