Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Container;
import java.awt.Graphics;
import java.awt.Polygon;

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

public class Main {

    public static void main(String args[]) {
        JFrame frame = new JFrame();
        Container contentPane = frame.getContentPane();
        Icon normalIcon = new TriangleIcon(Color.red, TriangleIcon.State.NORMAL);
        Icon pressedIcon = new TriangleIcon(Color.red, TriangleIcon.State.PRESSED);
        Icon rolloverIcon = new TriangleIcon(Color.red, TriangleIcon.State.ROLLOVER);
        JButton b = new JButton("Button", normalIcon);
        b.setPressedIcon(pressedIcon);
        b.setRolloverIcon(rolloverIcon);
        b.setRolloverEnabled(true);
        contentPane.add(b, BorderLayout.NORTH);
        frame.setSize(300, 100);
        frame.show();
    }
}

class TriangleIcon implements Icon {
    String name;

    static class State {
        public static final int NORMAL = 0;

        public static final int PRESSED = 1;

        public static final int ROLLOVER = 2;

        private State() {
        }
    }

    int state;

    Color color;

    public TriangleIcon(Color c, int state) {
        color = c;
        this.state = state;
    }

    public int getIconWidth() {
        return 20;
    }

    public int getIconHeight() {
        return 20;
    }

    public void paintIcon(Component c, Graphics g, int x, int y) {
        g.setColor(color);
        Polygon p = new Polygon();
        if (state == State.NORMAL) {
            p.addPoint(x + (getIconWidth() / 2), y);
            p.addPoint(x, y + getIconHeight() - 1);
            p.addPoint(x + getIconWidth() - 1, y + getIconHeight() - 1);
        } else if (state == State.PRESSED) {

            p.addPoint(x, y);
            p.addPoint(x + getIconWidth() - 1, y);
            p.addPoint(x + (getIconWidth() / 2), y + getIconHeight() - 1);
        } else {
            p.addPoint(x, y);
            p.addPoint(x, y + getIconHeight() - 1);
            p.addPoint(x + getIconWidth() - 1, y + (getIconHeight() / 2));
        }
        g.fillPolygon(p);
    }
}