如果在Java中按下并按住某个键,您会有什么感觉?
我一直在做一个单人乒乓球游戏,你现在用鼠标控制球拍。我已将关键点侦听器添加到帧中,您可以通过敲击“a”和“d”键来移动拨片,但无法按住它们。这是我现在拥有的代码,如果您能提供任何帮助,我将不胜感激如果在Java中按下并按住某个键,您会有什么感觉?,java,Java,我一直在做一个单人乒乓球游戏,你现在用鼠标控制球拍。我已将关键点侦听器添加到帧中,您可以通过敲击“a”和“d”键来移动拨片,但无法按住它们。这是我现在拥有的代码,如果您能提供任何帮助,我将不胜感激 import java.applet.*; import java.awt.*; import java.awt.event.*; import javax.swing.*; import java.awt.geom.*; import java.util.concurrent.*; import j
import java.applet.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.awt.geom.*;
import java.util.concurrent.*;
import java.util.*;
public class Experiment extends JApplet {
public static final int WIDTH = BallRoom.WIDTH;
public static final int HEIGHT = BallRoom.HEIGHT;
public PaintSurface canvas;
public void init()
{
this.setSize(WIDTH, HEIGHT);
canvas = new PaintSurface();
this.add(canvas, BorderLayout.CENTER);
canvas.requestFocusInWindow();
ScheduledThreadPoolExecutor executor = new ScheduledThreadPoolExecutor(3);
executor.scheduleAtFixedRate(new AnimationThread(this), 0L, 20L, TimeUnit.MILLISECONDS);
}
}
class AnimationThread implements Runnable
{
JApplet c;
public AnimationThread(JApplet c)
{
this.c = c;
}
public void run()
{
c.repaint();
}
}
class PaintSurface extends JComponent implements KeyListener
{
int paddle_x = 0;
int paddle_y = 360;
public boolean aDown;
public boolean dDown;
int score = 0;
float english = 1.0f;
Ball ball;
Color[] color = {Color.RED, Color.ORANGE, Color.MAGENTA, Color.ORANGE, Color.CYAN, Color.BLUE};
boolean aheld = false;
boolean dheld = false;
int colorIndex;
@Override
public void keyTyped(KeyEvent e)
{
System.out.println("Pressed " + e.getKeyChar());
}
@Override
public void keyPressed(KeyEvent e)
{
if (e.getKeyChar() == 'd')
paddle_x += 10;
if (e.getKeyChar() == 'a')
paddle_x -= 10;
}
@Override
public void keyReleased(KeyEvent e)
{
}
public PaintSurface()
{
addMouseMotionListener(new MouseMotionAdapter()
{
public void mouseMoved(MouseEvent e)
{
if (e.getX() - 30 - paddle_x > 5)
english = 1.5f;
else if (e.getX() - 30 - paddle_x < 5)
english = -1.5f;
else
english = 1.0f;
paddle_x = e.getX() - 30;
}
});
addKeyListener(this);
ball = new Ball(20);
}
public void paint(Graphics g)
{
Graphics2D g2 = (Graphics2D)g;
Shape paddle = new Rectangle2D.Float(paddle_x, paddle_y, 60, 8);
g2.setColor(color[colorIndex % 6]);
if (ball.intersects(paddle_x, paddle_y, 60, 8) && ball.y_speed > 0)
{
ball.y_speed = -ball.y_speed * 1.1;
ball.x_speed = ball.x_speed * 1.1;
if (english != 1.0f)
{
colorIndex++;
}
score += Math.abs(ball.x_speed * 10);
}
if (ball.getY() + ball.getHeight() >= BallRoom.HEIGHT)
{
ball = new Ball(20);
score -= 1000;
colorIndex = 0;
}
ball.move();
g2.fill(ball);
g2.setColor(Color.BLACK);
g2.fill(paddle);
g2.drawString("Score: " + score, 250, 20);
}
}
class Ball extends Ellipse2D.Float{
public double x_speed, y_speed;
private int d;
private int width = BallRoom.WIDTH;
private int height = BallRoom.HEIGHT;
public Ball(int diameter)
{
super((int) (Math.random() * (BallRoom.WIDTH - 20) + 1), 0, diameter, diameter);
this.d = diameter;
this.x_speed = (int) (Math.random() * 5) + 1;
this.y_speed = (int) (Math.random() * 5) + 1;
}
public void move()
{
if (super.x < 0 || super.x > width - d)
x_speed = -x_speed;
if (super.y < 0 || super.y > height - d)
y_speed = -y_speed;
super.x += x_speed;
super.y += y_speed;
}
}
import java.applet.*;
导入java.awt.*;
导入java.awt.event.*;
导入javax.swing.*;
导入java.awt.geom.*;
导入java.util.concurrent.*;
导入java.util.*;
公共课堂实验扩展JApplet{
公共静态最终整数宽度=BallRoom.WIDTH;
公共静态最终内部高度=舞厅高度;
公共漆面帆布;
公共void init()
{
此.setSize(宽度、高度);
canvas=新的PaintSurface();
添加(画布、边框布局、中心);
canvas.requestFocusInWindow();
ScheduledThreadPoolExecutor executor=新的ScheduledThreadPoolExecutor(3);
executor.scheduleAtFixedRate(新的AnimationThread(this),0L,20L,时间单位为毫秒);
}
}
类AnimationThread实现Runnable
{
雅普莱特c;
公共动画线程(JApplet c)
{
这个.c=c;
}
公开募捐
{
c、 重新油漆();
}
}
类PaintSurface扩展JComponent实现KeyListener
{
int-paile_x=0;
int桨_y=360;
公共住宅区;
公共场所;
智力得分=0;
浮动英语=1.0f;
球;
Color[]Color={Color.RED,Color.ORANGE,Color.洋红,Color.ORANGE,Color.CYAN,Color.BLUE};
布尔aheld=false;
布尔dheld=假;
int颜色指数;
@凌驾
public void keyTyped(KeyEvent e)
{
System.out.println(“按下”+e.getKeyChar());
}
@凌驾
按下公共无效键(按键事件e)
{
如果(例如getKeyChar()=='d')
桨叶_x+=10;
如果(例如getKeyChar()=='a')
桨叶_x-=10;
}
@凌驾
公共无效密钥已释放(密钥事件e)
{
}
公共漆面()
{
addMouseMotionListener(新的MouseMotionAdapter()
{
public void mouseMoved(MouseEvent e)
{
如果(如getX()-30-桨叶>5)
英语=1.5f;
否则,如果(e.getX()-30-桨叶x<5)
英语=-1.5f;
其他的
英语=1.0f;
桨_x=e.getX()-30;
}
});
addKeyListener(此);
球=新球(20);
}
公共空间涂料(图g)
{
图形2d g2=(图形2d)g;
形状桨=新矩形2D。浮动(桨x,桨y,60,8);
g2.设置颜色(颜色[颜色索引%6]);
如果(球相交(桨x、桨y、60、8)和球y速度>0)
{
ball.y_speed=-ball.y_speed*1.1;
ball.x_速度=ball.x_速度*1.1;
如果(英语!=1.0f)
{
彩色索引++;
}
分数+=数学绝对值(球x_速度*10);
}
if(ball.getY()+ball.getHeight()>=舞厅高度)
{
球=新球(20);
分数-=1000;
颜色指数=0;
}
ball.move();
g2.填充(球);
g2.设置颜色(颜色为黑色);
g2.填充(叶片);
g2.抽绳(“分数:+分数,250,20);
}
}
类球延伸椭圆2。浮动{
公共双x_速度,y_速度;
私人int d;
私人内部宽度=舞厅宽度;
私人内部高度=舞厅高度;
公共球(内径)
{
超级((int)(Math.random()*(BallRoom.WIDTH-20)+1),0,直径,直径;
d=直径;
这个.x_速度=(int)(Math.random()*5)+1;
this.y_speed=(int)(Math.random()*5)+1;
}
公开作废动议()
{
if(super.x<0 | | super.x>width-d)
x_速度=-x_速度;
if(super.y<0 | | super.y>height-d)
y_速度=-y_速度;
super.x+=x_速度;
super.y+=y_速度;
}
}
运行将以下代码用于KeyPressed()和KeyReleased()
然后让方法在计时器上运行,如果dheld或aheld为真,则移动拨片。线索在keylistener中;按键和按键释放。很抱歉,我似乎无法让它工作。我试图使它在aheld或dheld为真时移动拨片,但实际上它不会移动拨片。请解释一下在计时器上运行的方法是什么意思?使用和ActionListener。
@Override
public void keyPressed(KeyEvent e)
{
if (e.getKeyChar() == 'd')
dheld = true;
if (e.getKeyChar() == 'a')
aheld = true;
}
@Override
public void keyReleased(KeyEvent e)
{
if (e.getKeyChar() == 'd')
dheld = false;
if (e.getKeyChar() == 'a')
aheld = false;
}