[root@dabu.info ~]# java   -version

[root@dabu.info ~]# touch HelloWorld.java

public class HelloWorld {
public static void main(String[] args) {
System.out.println("Hello, World! This is a test code by nixCraft!");
}
}

[root@dabu.info ~]# javac HelloWorld.java
[root@dabu.info ~]# java HelloWorld

Hello, World! This is a test code by nixCraft!

[root@dabu.info ~]# java -jar file.jar
[root@dabu.info ~]# java -jar /path/to/my/java/app.jar #/path/to/my/java/app.jar表示应用的路径
[root@dabu.info ~]# java -jar /path/to/my/java/app.jar arg1 arg2  # arg1表示参数1 ，arg2表示参数2