Java swing边计算边重绘:动画排序算法

import javax.swing.*;
import java.awt.*;
import java.util.Arrays;

public class BubbleSortAnimation extends JFrame {
    private int[] array;
    private int[] tempArray;
    private int index1 = -1;
    private int index2 = -1;
    private boolean sorted = false;

    public BubbleSortAnimation(int[] array) {
        this.array = array;
        this.tempArray = Arrays.copyOf(array, array.length);
        setTitle("Bubble Sort Animation");
        setSize(800, 600);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setVisible(true);
    }

    @Override
    public void paint(Graphics g) {
        super.paint(g);
        Graphics2D g2d = (Graphics2D) g;
        int width = getWidth();
        int height = getHeight();
        int barWidth = width / array.length;

        for (int i = 0; i < array.length; i++) {
            int barHeight = (int) ((double) array[i] / getMaxValue() * height);
            if (i == index1 || i == index2) {
                g2d.setColor(Color.RED);
            } else {
                g2d.setColor(Color.BLUE);
            }
            g2d.fillRect(i * barWidth, height - barHeight, barWidth, barHeight);
        }
    }

    private int getMaxValue() {
        int max = Integer.MIN_VALUE;
        for (int value : array) {
            if (value > max) {
                max = value;
            }
        }
        return max;
    }

    public void startSorting() {
        Thread sortingThread = new Thread(() -> {
            for (int i = 0; i < array.length - 1 && !sorted; i++) {
                for (int j = 0; j < array.length - 1 - i; j++) {
                    index1 = j;
                    index2 = j + 1;
                    if (array[j] > array[j + 1]) {
                        swap(j, j + 1);
                        try {
                            Thread.sleep(100);
                        } catch (InterruptedException e) {
                            e.printStackTrace();
                        }
                        repaint();
                    }
                }
            }
            sorted = true;
        });
        sortingThread.start();
    }

    private void swap(int i, int j) {
        int temp = array[i];
        array[i] = array[j];
        array[j] = temp;
    }

    public static void main(String[] args) {
        int[] array = {5, 3, 8, 4, 2};
        BubbleSortAnimation bsa = new BubbleSortAnimation(array);
        bsa.startSorting();
    }
}