run-a-hello-world-program-in-eclipse.md

Run A Hello World Program In Eclipse

First, you'll need to create a new Java Project if you don't already have one to work in.

From there, you can add a new Class to the src folder of that project. I'll call mine Greeting.java and the only thing it will contain is a main method.

public class Greeting {
    public static void main(String[] args) {
    	String name = args.length > 0 ? args[0] : "World";

        System.out.println("Hello, " + name + "!");
    }
}

This method tries to read a name from the arguments given to the program at time of execution. If one wasn't provided the ternary falls back to "World" as the default name. It then prints the greeting to stdout.

To run this program, we can either select Run from the Run menu (which will result in Hello, World!) or we can select Run Configurations... from the same menu and add a custom name to Program Arguments under the Arguments tab.