Java利用随机分钱模拟财富变化

效果图

如果财富为负值时可以通过键盘和鼠标事件让其反转方向

示例代码

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

public class AlgoVisualizer {

    private static int DELAY = 40;
    private int[] money;
    private AlgoFrame frame;

    public AlgoVisualizer(int sceneWidth, int sceneHeight){

        // 初始化数据
        money = new int[100];
        for(int i = 0 ; i < money.length ; i ++)
            money[i] = 100;

        // 初始化视图
        EventQueue.invokeLater(() -> {
            frame = new AlgoFrame("Money Problem", sceneWidth, sceneHeight);
            this.frame.addKeyListener(new AlgoKeyListener());
            frame.addMouseListener(new AlgoMouseListener());
            new Thread(() -> {
                run();
            }).start();
        });
    }

    public void run(){

        while(true){

            // 改进2：是否排序
            Arrays.sort(money);
            frame.render(money);
            AlgoVisHelper.pause(DELAY);

            // 改进1：每一帧执行的轮数
            for(int k = 0 ; k < 50 ; k ++){
                for(int i = 0 ; i < money.length; i ++){
                    // 改进3：允许money为负值
                    //if(money[i] > 0){
                        int j = (int)(Math.random() * money.length);
                        money[i] -= 1;
                        money[j] += 1;
                    //}
                }
            }
        }
    }

    public static void main(String[] args) {

        int sceneWidth = 1000;
        int sceneHeight = 800;

        AlgoVisualizer vis = new AlgoVisualizer(sceneWidth, sceneHeight);
    }

    private class AlgoKeyListener extends KeyAdapter {
        private AlgoKeyListener() {}

        public void keyReleased(KeyEvent event) {
            if (event.getKeyChar() == 'u') {
                System.out.println("字母u");
                AlgoVisHelper.is_change = true;
            }
            if (event.getKeyChar() == 'd') {
                System.out.println("字母d");

                AlgoVisHelper.is_change = false;
            }

            if (event.getKeyChar() == ' ') {
                System.out.println("空格");
                AlgoVisHelper.is_change = !AlgoVisHelper.is_change ;
            }

        }
    }

    private class AlgoMouseListener extends MouseAdapter {
        private AlgoMouseListener() {
        }

        public void mousePressed(MouseEvent event) {
//            event.translatePoint(0, -(AlgoVisualizer.this.frame.getBounds().height - AlgoVisualizer.this.frame.getCanvasHeight()));

//            left
           if (event.getButton() == 1)
           {
               System.out.println("Left button pressed");
               AlgoVisHelper.is_change = true;

           }
//         right
           else if( event.getButton() == 3)
           {
               System.out.println("right button pressed");

               AlgoVisHelper.is_change = false;

           }
//            System.out.println("mousePressed");
//            AlgoVisHelper.is_change = !AlgoVisHelper.is_change;

        }
    }

}

import javax.swing.*;
import java.awt.*;
import java.awt.geom.*;
import java.lang.InterruptedException;

public class AlgoVisHelper {

    private AlgoVisHelper(){}

    public static final Color Red = new Color(0xF44336);
    public static final Color Pink = new Color(0xE91E63);
    public static final Color Purple = new Color(0x9C27B0);
    public static final Color DeepPurple = new Color(0x673AB7);
    public static final Color Indigo = new Color(0x3F51B5);
    public static final Color Blue = new Color(0x2196F3);
    public static final Color LightBlue = new Color(0x03A9F4);
    public static final Color Cyan = new Color(0x00BCD4);
    public static final Color Teal = new Color(0x009688);
    public static final Color Green = new Color(0x4CAF50);
    public static final Color LightGreen = new Color(0x8BC34A);
    public static final Color Lime = new Color(0xCDDC39);
    public static final Color Yellow = new Color(0xFFEB3B);
    public static final Color Amber = new Color(0xFFC107);
    public static final Color Orange = new Color(0xFF9800);
    public static final Color DeepOrange = new Color(0xFF5722);
    public static final Color Brown = new Color(0x795548);
    public static final Color Grey = new Color(0x9E9E9E);
    public static final Color BlueGrey = new Color(0x607D8B);
    public static final Color Black = new Color(0x000000);
    public static final Color White = new Color(0xFFFFFF);

    public static void strokeCircle(Graphics2D g, int x, int y, int r){

        Ellipse2D circle = new Ellipse2D.Double(x-r, y-r, 2*r, 2*r);
        g.draw(circle);
    }

    public static void fillCircle(Graphics2D g, int x, int y, int r){

        Ellipse2D circle = new Ellipse2D.Double(x-r, y-r, 2*r, 2*r);
        g.fill(circle);
    }

    public static void strokeRectangle(Graphics2D g, int x, int y, int w, int h){

        Rectangle2D rectangle = new Rectangle2D.Double(x, y, w, h);
        g.draw(rectangle);
    }

    public static void fillRectangle(Graphics2D g, int x, int y, int w, int h){

        Rectangle2D rectangle = new Rectangle2D.Double(x, y, w, h);
        g.fill(rectangle);
    }

    public static void setColor(Graphics2D g, Color color){
        g.setColor(color);
    }

    public static void setStrokeWidth(Graphics2D g, int w){
        int strokeWidth = w;
        g.setStroke(new BasicStroke(strokeWidth, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND));
    }

    public static void pause(int t) {
        try {
            Thread.sleep(t);
        }
        catch (InterruptedException e) {
            System.out.println("Error sleeping");
        }
    }

    public static void putImage(Graphics2D g, int x, int y, String imageURL){

        ImageIcon icon = new ImageIcon(imageURL);
        Image image = icon.getImage();

        g.drawImage(image, x, y, null);
    }

    public static void drawText(Graphics2D g, String text, int centerx, int centery){

        if(text == null)
            throw new IllegalArgumentException("Text is null in drawText function!");

        FontMetrics metrics = g.getFontMetrics();
        int w = metrics.stringWidth(text);
        int h = metrics.getDescent();
        g.drawString(text, centerx - w/2, centery + h);
    }

    public  static  int changeDir(int change)
    {
//        System.out.println("bollen");
        change += 2;

        return change;
    }

    public static boolean is_change = false;

}

import java.awt.Graphics2D;
import java.awt.Graphics;
import java.awt.Dimension;
import java.awt.Color;
import java.awt.RenderingHints;
import java.util.ArrayList;
import java.util.Map;
import java.util.HashMap;

import javax.swing.*;

public class AlgoFrame extends JFrame{

    private int canvasWidth;
    private int canvasHeight;

    public AlgoFrame(String title, int canvasWidth, int canvasHeight){

        super(title);

        this.canvasWidth = canvasWidth;
        this.canvasHeight = canvasHeight;

        AlgoCanvas canvas = new AlgoCanvas();
        setContentPane(canvas);
        pack();

        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setResizable(false);

        setVisible(true);
    }

    public AlgoFrame(String title){

        this(title, 1024, 768);
    }

    public int getCanvasWidth(){return canvasWidth;}
    public int getCanvasHeight(){return canvasHeight;}

    // data
    private int[] money;
    public void render(int[] money){
        this.money = money;
        repaint();
    }

    private class AlgoCanvas extends JPanel{

        public AlgoCanvas(){
            // 双缓存
            super(true);
        }

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

            Graphics2D g2d = (Graphics2D)g;

            // 抗锯齿
            RenderingHints hints = new RenderingHints(
                    RenderingHints.KEY_ANTIALIASING,
                    RenderingHints.VALUE_ANTIALIAS_ON);
            hints.put(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
            g2d.addRenderingHints(hints);

            // 具体绘制
            int w = canvasWidth / money.length;
            for(int i = 0 ; i < money.length ; i ++)

                if(money[i] > 0) {
                    AlgoVisHelper.setColor(g2d, AlgoVisHelper.Blue);
                    AlgoVisHelper.fillRectangle(g2d,
                            i * w + 1, canvasHeight / 2 - money[i], w - 1, money[i]);
                }
                else{

                    if(AlgoVisHelper.is_change == true)
                    {
                        AlgoVisHelper.setColor(g2d, AlgoVisHelper.Red);
                        AlgoVisHelper.fillRectangle(g2d,
                                i * w + 1, canvasHeight / 2 + money[i] , w - 1, -money[i]);
                    }
                    else
                    {
                        AlgoVisHelper.setColor(g2d, AlgoVisHelper.Red);
                        AlgoVisHelper.fillRectangle(g2d,
                                i * w + 1, canvasHeight / 2 , w - 1, -money[i]);
                    }

                }

                下移至图像下面开始
//            if(money[i] > 0) {
//                AlgoVisHelper.setColor(g2d, AlgoVisHelper.Blue);
//                AlgoVisHelper.fillRectangle(g2d,
//                        i * w + 1, canvasHeight  - money[i], w - 1, money[i]);
//            }
//            else{
//
//                AlgoVisHelper.setColor(g2d, AlgoVisHelper.Red);
//                AlgoVisHelper.fillRectangle(g2d,
//                        i * w + 1, canvasHeight + money[i] , w - 1, -money[i]);
//            }
//
        }

        @Override
        public Dimension getPreferredSize(){
            return new Dimension(canvasWidth, canvasHeight);
        }
    }
}

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