linux环境下java程序打包成简单的hello world输出jar包示例

#javac -version
javac 1.8.0_20

#cd ~
~# mkdir helloworld
~# cd helloworld
~/helloworld# vi helloworld.java

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

~/helloworld# javac helloworld.java
~/helloworld# ls
~/helloworld# echo Main-class: helloworld > manifest.txt
~/helloworld# ls
~/helloworld# cat manifest.txt
~/helloworld# jar cvfm hello.jar manifest.txt helloworld.class

~/helloworld# ls
~/helloworld# java -jar hello.jar
hello world!!