4. JFrame, JLabel Example (MyFrame)

import java.awt.FlowLayout;
import javax.swing.JFrame;
import javax.swing.JLabel;

public class MyFrame extends JFrame{

    // Variables
    private JLabel myLabel;                                              // Each frame must have a label to contain words, text, images

    // Constructor
    public MyFrame(){
        super("JFrame's title");                                    // JFrame's title
        setLayout(new FlowLayout());                                    // JFrame must follow the rules of a layout
        myLabel = new JLabel("JLabel's text container");           // The container
        myLabel.setToolTipText("Text appearing while hovering");
        add(myLabel);
    }

    // Main
    public static void main(String args[]){
        MyFrame frame = new MyFrame();
        frame.setDefaultCloseOperation(EXIT_ON_CLOSE);
        frame.setSize(600, 600);
        frame.setVisible(true);
    }

}