MainClass.java Source code

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Here is the source code for MainClass.java

Source

import java.awt.GridLayout;
import java.awt.event.KeyEvent;

import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JRootPane;

public class MainClass {

    public static void main(String[] a) {
        JFrame frame = new JFrame("DefaultButton");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        frame.setLayout(new GridLayout(2, 2, 10, 10));

        JButton button1 = new JButton("Text Button");
        button1.setMnemonic(KeyEvent.VK_B);
        frame.add(button1);

        JButton button2 = new JButton("warn");
        frame.add(button2);

        JButton button3 = new JButton("Warning");
        frame.add(button3);

        String htmlButton = "<html><sup>HTML</sup> <sub><em>Button</em></sub><br>"
                + "<font color=\"#FF0080\"><u>Multi-line</u></font>";
        JButton button4 = new JButton(htmlButton);
        frame.add(button4);

        JRootPane rootPane = frame.getRootPane();
        rootPane.setDefaultButton(button2);

        frame.setSize(300, 200);
        frame.setVisible(true);
    }
}