When you need to invoke java command after install JDK successfully, it is better to setup below Java related system environment variable, they are JAVA_HOME, CLASSPATH, PATH. This article will tell you how to set them up in windows and Linux.
How To Set Java Environment Viriable JAVA_HOME, CLASSPATH, PATH Read More »
This article will show you how to parse out one java class’s methods via the JDK parser. It will parse out the method modifier, return type, name, parameters, threw exceptions, and method body.
How To Parse Java Source Code Use JDK Parser Read More »
If you want to create a file in java. You have three ways to do that. This article will show you how to use java.io.File.createNewFile(), java.nio.file.Files and org.apache.commons.io.FileUtils.write() to create a file in java.
Java Create File Examples Read More »
If you want to make your java code platform-independent, especially for java file operation, you should know java file separators. There are four separators by default, they are : File.separator, File.separatorChar, File.pathSeparator and File.pathSeparatorChar. We will introduce them one by one.
Java File Separator And Current Working Directory Examples Read More »
This article will show you how to use java.io.File, java.nio.file.Files and org.apache.commons.io.FileUtils to move file or directory to another file or directory.
Java Move Files Between Directories Read More »
This article has examples about how to create a directory use java.io.File, java.nio.file.Files and org.apache.commons.io.FileUtils. If you do not know how to add Apache commons io jar file into your java project, please read article Copy Directory Examples.
Java Create Directory Examples Read More »
Today I will show you three java examples that copy the source directory with it’s content to the target directory.
Java Copy Directory Examples Read More »
When you operate a java collection object use iterator, you may always meet java.util.ConcurrentModificationException error. It is because the java collection object has been changed while others still use the method iterator.next() to loop in it. Below is just an example code that can throw concurrent modification exceptions.
Java.util.ConcurrentModificationException Examples And Resolution Read More »
Deadlock is a reason which causes the java program to hang. The reason for this may be two or more java threads are waiting for each other to release the locked objects which they want to lock also. Of course, we should avoid this kind of situation in java programming. This article will show you
Java Deadlock Example Read More »
The class java.util.Date provides a lot of methods that can be used to compare two Date objects. They are compareTo(), equals(), before(), after() and getTime(). This article will show you examples of how to use them to compare java Date objects.
Java Compare Date Example Read More »
