需要帮助在Java的突围游戏中移动桨杆

我正在为AP计算机科学课程制作游戏突破。我已经完成了大部分工作，但我不知道如何使用键盘上的箭头键左右移动桨。我可以得到一些帮助吗？我会很感激。需要帮助在Java的突围游戏中移动桨杆

这是我到目前为止有：

主类：

import java.util.ArrayList; 
import java.util.Random; 
import processing.core.PApplet; 
import java.util.random; 

public class Main extends PApplet { 

ArrayList<Brick> bricks = new ArrayList<Brick>(); 
ArrayList<Ball> balls = new ArrayList<Ball>(); 
ArrayList<Paddle> paddles = new ArrayList<Paddle>(); 
Paddle paddle; 
Brick brick; 
Brick bricklevel2; 
Ball ball; 
Random g = new Random(); 



public void setup() { 
    size(600, 600); 

    for (int i = 0; i < 4; i ++){ 
     brick = new Brick(100 + 100*i, 100, 10, 30, color(255, 0, 0), this); 
     bricks.add(brick); 
    } 
    for (int i = 0; i < 4; i ++){ 
     bricklevel2 = new Brick(100 + 100*i, 110, 10, 30, color(255, 0, 0), this); 
     bricks.add(bricklevel2); 
    } 

    balls.add(ball = new Ball(250, 300, color(89, 700, 999), 20, g.nextInt(20)-10, 10, this)); 
    paddles.add(paddle = new Paddle(300 - 105, 500, 50, 500, color(500, 65, 800), this)); 



} 

public void draw() { 
    background(0); 
    for(int i = 0; i < bricks.size(); i++){ 
     Brick brick = bricks.get(i); 

     if (brick.isColliding(ball)) { 
      bricks.remove(i); 
     } 
     brick.draw(); 
    } 
    for(Ball b: balls){ 
     b.update(brick, paddle); 
     b.draw(); 

    } 
    for(Paddle p: paddles){ 
     p.update(paddle); 
     p.draw(); 
    } 


} 


public static void main(String args[]) { 
    PApplet.main(new String[] {"Main"}); 
} 
}

桨类：

import java.awt.Color; 
import processing.core.PApplet; 

public class Paddle{ 
private int xPosition, yPosition, length, width, color; 
private PApplet p; 

public Paddle(int x, int y, int l, int w, int c, PApplet p) { 
    xPosition = x; 
    yPosition = y; 
    length = l; 
    width = w; 
    color = c; 
    this.p = p; 

} 

public void draw() { 
    p.fill(color); 
    p.rect(xPosition, yPosition, 210, 17); 
} 

public void update(Paddle paddle) { 
    // TODO Auto-generated method stub 

} 

public int getLeft(){ 
    int n = xPosition - 105; 
    //System.out.println(n); 
    return n; 
} 

public int getRight(){ 
    int n = xPosition + 105; 
    //System.out.println(n); 
    return n; 

} 
}

来源

2012-05-31 Kenneth Santos