Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

import javax.swing.JFrame;
import javax.swing.JPanel;

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

    int[] numbers = new int[50];
    int min = 20;
    int max = 100;
    boolean shuffle = false;
    static final int ITERATION_SLEEP = 150;

    public Main() {
        loadArray();
        addMouseListener(new MouseAdapter() {
            @Override
            public void mouseClicked(MouseEvent e) {
                if (shuffle)
                    loadArray();
                selectionSort(numbers);
                shuffle = true;
            }
        });
    }

    @Override
    public Dimension getPreferredSize() {
        return new Dimension(300, 100);
    }

    private void loadArray() {
        for (int i = 0; i < numbers.length; i++) {
            numbers[i] = min + (int) (Math.random() * ((max - min) + 1));
        }
    }

    public void selectionSort(final int[] x) {
        new Thread(new Runnable() {
            @Override
            public void run() {
                for (int i = 0; i < x.length - 1; i++) {
                    int minIndex = i;
                    for (int j = i + 1; j < x.length; j++) {
                        if (x[minIndex] > x[j]) {
                            minIndex = j;
                        }
                    }
                    if (minIndex != i) {
                        int temp = x[i];
                        x[i] = x[minIndex];
                        x[minIndex] = temp;
                    }
                    repaint();
                    try {
                        Thread.sleep(ITERATION_SLEEP);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
            }
        }).start();
    }

    private void drawPass(Graphics g) {
        int rectWidth = 1;

        int width = getWidth() - 1;
        int height = getHeight() - 1;
        int colSpan = Math.round((float) width / (float) numbers.length);
        int x = 0;

        for (int num : numbers) {
            int colHeight = (int) ((float) height * ((float) num / (float) 100));
            g.fillRect(x, height - colHeight, rectWidth, colHeight);
            x += colSpan;
        }
    }

    @Override
    public void paintComponent(Graphics g) {
        super.paintComponent(g);
        drawPass(g);
    }
}