Java Executable Jar Package Hello; public class Hello{

public static void main(String[] args){
    System.out.println("hello wolrd");


/hello/ hello.class javac-d. hello.class javac-d

Jar jar CVF hello.jar./hello/ hello.class If you run the jar command at this time, you will get an error [there is no master manifest attribute in hello.jar]

Unzip the JAR file and find MANIFEST.MF. Open it with a text editor and add the following line [important] main-class: hello.hello

4. Copy the edited MANIFEST.MF file to the hello.class equivalent directory. Jar CVFM hello.jar./hello/MANIFEST. Mf./hello/ hello.class