Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.awt.Color;
import java.awt.Graphics;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.image.BufferedImage;
import java.util.Random;

import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.Timer;

public class Main extends JPanel {
    static Color[] COLORS = { Color.blue, Color.red, Color.yellow, Color.orange, Color.green, Color.cyan,
            Color.lightGray, Color.magenta, Color.white, Color.black };
    static Icon[] ICONS = new Icon[COLORS.length];
    static int ROWS = 20;
    static int COLS = 30;
    static int BI_WIDTH = 20;
    static int BI_HEIGHT = BI_WIDTH;
    static int TIMER_DELAY = 15;
    static int NUMBER_TO_SWAP = 15;
    JLabel[][] grid = new JLabel[ROWS][COLS];
    Random random = new Random();
    static {
        for (int i = 0; i < ICONS.length; i++) {
            BufferedImage img = new BufferedImage(BI_WIDTH, BI_HEIGHT, BufferedImage.TYPE_INT_ARGB);
            Graphics g = img.getGraphics();
            g.setColor(COLORS[i]);
            g.fillRect(0, 0, BI_WIDTH, BI_HEIGHT);
            g.dispose();
            ICONS[i] = new ImageIcon(img);
        }
    }

    public Main() {
        setLayout(new GridLayout(ROWS, COLS));
        for (int row = 0; row < grid.length; row++) {
            for (int col = 0; col < grid[row].length; col++) {
                JLabel label = new JLabel();
                int index = random.nextInt(COLORS.length);
                label.setIcon(ICONS[index]);
                add(label);
                grid[row][col] = label;
            }
        }
        new Timer(TIMER_DELAY, new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent evt) {
                for (int i = 0; i < NUMBER_TO_SWAP; i++) {
                    int row = random.nextInt(ROWS);
                    int col = random.nextInt(COLS);
                    int iconIndex = random.nextInt(ICONS.length);
                    grid[row][col].setIcon(ICONS[iconIndex]);
                }
            }
        }).start();
    }

    public static void main(String[] args) {
        JFrame frame = new JFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.getContentPane().add(new Main());
        frame.pack();
        frame.setVisible(true);
    }
}