How to make a JAR!

foo.txt

➜  /tmp tree com
com
└── test
    └── Test.java

1 directory, 2 files
➜  /tmp more com/test/Test.java 
package com.test;

class Test {
    public static void main(String[] args) {
         System.out.println("Hello!");
    }
}
➜  /tmp javac com/test/Test.java 
➜  /tmp tree com
com
└── test
    ├── Test.class
    └── Test.java

1 directory, 2 files
➜  /tmp more MANIFEST.MF 
Main-Class: com.test.Test
➜  /tmp jar cvfm test.jar MANIFEST.MF com/test/Test.class
added manifest
adding: com/test/Test.class(in = 417) (out= 289)(deflated 30%)
➜  /tmp java -jar test.jar
Hello!

=> So it does work as expected.