首先，如果我在错误的地方问这个问题或者问这个问题做错了什么，我很抱歉。如果我需要更正任何内容，请通知我。我正在制作一个躲避球类型的游戏，您可以在其中用鼠标移动一个正方形并尝试躲避敌人。敌人本身就是正方形，他们将来自屏幕的随机侧面。我想知道我怎么能：
A. 让程序自己创建方格，玩家得分越高，数量越多。
B. 使方块外观的位置在屏幕边缘随机出现。
这是我的代码。这是我绘制矩形的部分：
public void paint(Graphics g){
dbImage = createImage(getWidth(), getHeight());
dbg = dbImage.getGraphics();
paintComponent(dbg);
g.drawImage(dbImage, 0, 0, this);
}
public void paintComponent(Graphics g) {
Rectangle player = new Rectangle(playerX, playerY, 50, 50);
g.setColor(Color.blue);
g.fillRect(player.x, player.y, player.width, player.height);
}
下面是 GamePanel 类的完整代码：
package main;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.Rectangle;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JPanel;
public class GamePanel extends JPanel implements Runnable{
//Global variables
//Double buffering
private Image dbImage;
private Graphics dbg;
//JPanel variables
static final int GWIDTH = 500, GHEIGHT = 500;
static final Dimension gameDim = new Dimension(GWIDTH, GHEIGHT);
//Game variable
private Thread game;
private volatile boolean running = false;
public boolean mouseClicked = false;
//Character variables
int playerX = 150, playerY = 150;
public class Mouse extends MouseAdapter{
public void mousePressed(MouseEvent e){
mouseClicked = true;
}
public void mouseReleased(MouseEvent e){
mouseClicked = false;
}
public void mouseMoved(MouseEvent e){
mouseClicked = false;
repaint();
playerX = e.getX()-25;
playerY = e.getY()-25;
if(playerX <= 50){
playerX = 50;
}
else if(playerX >= 400){
playerX = 400;
}
if(playerY <= 25){
playerY = 25;
}
else if(playerY >= 400){
playerY = 400;
}
repaint();
}
}
public GamePanel(){
addMouseMotionListener(new Mouse());
setPreferredSize(gameDim);
setBackground(Color.BLUE);
setFocusable(true);
requestFocus(true);
}
public void run(){
while(running){
}
}
public void addNotify(){
super.addNotify();
startGame();
}
private void startGame(){
if(game == null || !running){
game = new Thread(this);
game.start();
running = true;
}
}
public void stopGame(){
if(running){
running = false;
}
//Paint method
}
public void paint(Graphics g){
dbImage = createImage(getWidth(), getHeight());
dbg = dbImage.getGraphics();
paintComponent(dbg);
g.drawImage(dbImage, 0, 0, this);
}
public void paintComponent(Graphics g) {
Rectangle player = new Rectangle(playerX, playerY, 50, 50);
g.setColor(Color.blue);
g.fillRect(player.x, player.y, player.width, player.height);
}
private void log(String s){
System.out.println(s);
}
}
感谢您的时间。