[JAVA] Hello World application

package something; //Package name replaces "something"

import javax.swing.*;

public class myclass { //Class name replaces "myclass"
    public static void main(String [] args) {
        JFrame frame = new JFrame("Frame"); //Create our JFrame that stores "Hello world!"
        frame.setVisible(true);
        frame.setSize(400, 200);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        JLabel label = new JLabel("Hello World!"); //This is the text that will appear in our JFrame.
        frame.add(label); //This makes the text appear in the JFrame.
    }
}