I m new to java and trying to learn about jar. I have created simple HelloWorld program. Created a jar file and trying to execute that jar.
HelloWorld.java
public class HelloWorld {
public static void main(String[] args) {
System.out.println("Hello, World");
}
}
Manifest.txt
Main-Class: HelloWorld
Following command to create jar
jar cfm HelloWorld.jar Manifest.txt HelloWorld.class
So far so good, when I m trying execute jar its showing below message
E:\Java_Example>java -jar HelloWorld.jar
no main manifest attribute, in HelloWorld.jar
However, when I did google about it, I found another command which works fine for me.
E:\Java_Example>java -cp HelloWorld.jar HelloWorld
Hello, World
I need to understand why "java -jar" command did not work for me? What changes I need to make to my program so that java -jar command will work?
