手把手一步一步教你使用Java开发一个大型街机动作闯关类游戏13之英雄不要走出屏幕

public final static int BOUND_LEFT = 50;
        public final static int BOUND_RIGHT = 555;
        public final static int BOUND_TOP = 150;
        public final static int BOUND_BOTTOM = 330;

private int _topLocked = 0;
    private int _bottomLocked = 0;
    private int _leftLocked = 0;
    private int _rightLocked = 0;
    private void _handleMovement(){
        _keyPressed = false;
        if(_input.isKeyDown(KeyEvent.VK_UP) && getZ() > _topLocked){
            _keyPressed = true;
            move(0, -_yspeed);
        }
        if(_input.isKeyDown(KeyEvent.VK_DOWN) && getZ() < _bottomLocked){
            _keyPressed = true;
            move(0, _yspeed);
        }
        if(_input.isKeyDown(KeyEvent.VK_RIGHT) && _animator.getX() < _rightLocked) {
            _keyPressed = true;
            move(_xspeed,0);
        }
        if(_input.isKeyDown(KeyEvent.VK_LEFT) && _animator.getX() > _leftLocked) {
            _keyPressed = true;
            move(-_xspeed,0);
        }
        if(!_keyPressed){
            _animator.setAnimation("idle");
            _animator.translate(0,0);
        }
    }

_player.setLockedBounds(Config.BOUND_TOP, Config.BOUND_BOTTOM,
                    Config.BOUND_LEFT, Config.BOUND_RIGHT);