磚變色的時間每個實例

Question

所以，我用Java做突破（這不是H/W，放學了）

我想磚是在顏色隨機的，但我的磚塊變色遊戲正在運行。所以現在，它看起來像磚頭照亮了！請幫忙！！

package main; 

import java.awt.Color; 
import java.awt.Graphics; 
import java.awt.Rectangle; 
import java.util.ArrayList; 
import java.util.Random; 

public class Brick { 
    public static final int X = 0, Y = 0, ROW_SIZE = 8, COL_SIZE = 5; 
    private Random random = new Random(); 
    private ArrayList<Rectangle> arr = new ArrayList<>(); 

public Brick(int width, int height) { 
    for(int i = 0; i < COL_SIZE; i++){ 
     for(int j = 0; j < ROW_SIZE; j++) { 
      Rectangle r = new Rectangle(X + (j * (width/ROW_SIZE)), 
         Y + (i * (height/COL_SIZE)), (width/ROW_SIZE), (height/COL_SIZE)); 
      arr.add(r); 
     } 
    } 
} 

public ArrayList<Rectangle> getList(){ 
    return arr; 
} 

public void setList(ArrayList<Rectangle> rects){ 
    arr = rects; 
} 

public void paint(Graphics g){ 
    for(Rectangle rect : arr){ 
     g.setColor(new Color(random.nextInt(256), random.nextInt(256), random.nextInt(256))); 
     g.fillRect(rect.x, rect.y, rect.width, rect.height); 
    } 
} 

}

package main; 

import java.awt.Color; 
import java.awt.Dimension; 
import java.awt.Graphics; 
import java.awt.event.ActionEvent; 
import java.awt.event.ActionListener; 
import java.awt.event.KeyEvent; 
import java.awt.event.KeyListener; 

import javax.swing.BoxLayout; 
import javax.swing.JLabel; 
import javax.swing.JPanel; 
import javax.swing.Timer; 

public class GamePanel extends JPanel implements ActionListener, KeyListener { 

Player player = new Player(); 
Ball ball = new Ball(); 
Brick brick = new Brick(Pong.WIDTH, Pong.HEIGHT/3); 
JLabel label, gameOverLabel; 
Timer time; 

public GamePanel() { 
    super(); 
    setLayout(new BoxLayout(this, BoxLayout.Y_AXIS)); 
    time = new Timer(50, this); 
    time.start(); 

    this.addKeyListener(this); 
    setFocusable(true); 

    // Displaying score 
    label = new JLabel(); 
    gameOverLabel = new JLabel(); 
    gameOverLabel.setPreferredSize(new Dimension(Short.MAX_VALUE, Short.MAX_VALUE)); 
    gameOverLabel.setAlignmentX(CENTER_ALIGNMENT); 
    label.setAlignmentX(CENTER_ALIGNMENT); 
    add(label); 
    add(gameOverLabel); 

} 

private void update() { 
    player.update(); 

    if (ball.update()) { 
     gameOverLabel.setText("GAME OVER"); 
     time.stop(); 
    } 

    ball.checkCollisionWith(player); 
    ball.checkBrickCollision(brick); 
} 

public void paintComponent(Graphics g) { 
    g.setColor(Color.LIGHT_GRAY); 
    g.fillRect(0, 0, getWidth(), getHeight()); 

    player.paint(g); 
    ball.paint(g); 
    brick.paint(g); 
} 

public void actionPerformed(ActionEvent e) { 
    update(); 
    label.setText("Score: " + ball.getScore()); 
    repaint(); 
} 

@Override 
public void keyPressed(KeyEvent e) { 
    // Speed of player 
    int playerVelocity = 8; 

    if (e.getKeyCode() == KeyEvent.VK_RIGHT) { 
     player.setXVelocity(playerVelocity); 
    } else if (e.getKeyCode() == KeyEvent.VK_LEFT) { 
     player.setXVelocity(-playerVelocity); 
    } else if (e.getKeyCode() == KeyEvent.VK_R) { 
     ball = new Ball(); 
     player = new Player(); 
     ball.setScore(0); 
     label.setText("Score: " + ball.getScore()); 
     gameOverLabel.setText(""); 
     repaint(); 
     time.start(); 
    } 
} 

@Override 
public void keyReleased(KeyEvent e) { 
    player.setXVelocity(0); 
} 

@Override 
public void keyTyped(KeyEvent e) { 
} 

}

請幫助！謝謝...

Answer 1

public void paint(Graphics g){ 
    for(Rectangle rect : arr){ 
     g.setColor(new Color(random.nextInt(256), random.nextInt(256), random.nextInt(256))); 
     g.fillRect(rect.x, rect.y, rect.width, rect.height); 
    } 
} 

的確，它在每次重繪時都會改變顏色 - 您在每次調用時都會創建新的隨機顏色。我認爲你應該在Brick構造函數中創建顏色並重用它。