这篇“Java如何利用随机分钱模拟财富变化”文章的知识点大部分人都不太理解，所以小编给大家总结了以下内容，内容详细，步骤清晰，具有一定的借鉴价值，希望大家阅读完这篇文章能有所收获，下面我们一起来看看这篇“Java如何利用随机分钱模拟财富变化”文章吧。
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);
}
}
}