每当我告诉矩形向左移动时,它一直移动到屏幕的左侧,当我只想移动一点时。每当我告诉它向右移动时,它根本不动。我做错了什么?
public class Balls {
private static final int MOVE_SPEED_X = 2;
private int x, y, width, height, velX, velY;
private Rectangle rect;
public Balls(int x, int y, int height, int width) {
this.x = x;
this.y = y;
this.width = width;
this.height = height;
velX = 0;
}
public void update() {
y += 3;
}
public void reset() {
y = 0;
}
public void accelLeft() {
x = -MOVE_SPEED_X;
}
public void accelRight() {
x = +MOVE_SPEED_X;
}
}
第二块相关代码
public class PlayState extends State {
private Paddle paddleRight, paddleLeft;
private static final int PADDLE_WIDTH = 30;
private static final int PADDLE_HEIGHT = 60;
private Ball ball;
private Balls balls;
// bDiam stands for ball diameter
private static int bDiam = 30;
private int playerScore = 0;
private Font scoreFont;
@Override
public void init() {
paddleLeft = new Paddle(0, 195, PADDLE_WIDTH, PADDLE_HEIGHT);
paddleRight = new Paddle(785, 195, PADDLE_WIDTH, PADDLE_HEIGHT);
scoreFont = new Font("SansSerif", Font.BOLD, 25);
//ball = new Ball(300, 200, bDiam, bDiam);
balls = new Balls(500, 0, bDiam, bDiam);
}
@Override
public void onClick(MouseEvent e) {
// bDiam = bDiam + 20;
}
@Override
public void update() {
balls.update();
if (balls.getY() > GameMain.GAME_HEIGHT) {
balls.reset();
}
}
@Override
public void onKeyPress (KeyEvent e){
if (e.getKeyCode() == KeyEvent.VK_RIGHT) {
balls.accelRight();
}
if (e.getKeyCode() == KeyEvent.VK_LEFT) {
balls.accelLeft();
}
}
}
答案 0 :(得分:0)
在accelLeft中应该是x = x - MOVE_SPEED_X(在accelRight中类似)