你如何让角色跳跃，无论是对象还是普通跳跃？

谈到java编程时，我是一个初学者，我在学校有一个项目，在那里我要创建一个类似于Icy Tower的游戏。而我的问题是，我该怎么写才能让角色站在地上，并能够跳起对象？你如何让角色跳跃，无论是对象还是普通跳跃？

这里是我到目前为止的代码：

第一部分

package Sprites; 

import java.awt.Image; 
import java.awt.event.KeyEvent; 

import javax.swing.ImageIcon; 

public class jumper { 

private String jump = "oka.png"; 

private int dx; 
private int dy; 
private int x; 
private int y; 
private Image image; 

public jumper() { 
ImageIcon ii = new ImageIcon(this.getClass().getResource(jump)); 
image = ii.getImage(); 
x = 50; 
y = 100; 
    } 

public void move() { 
x += dx; 
y += dy; 
} 

public int getX() { 
return x; 
} 

public int getY() { 
return y; 
} 

public Image getImage() { 
return image; 
} 



public void keyPressed(KeyEvent e) { 
int key = e.getKeyCode(); 



if (key == KeyEvent.VK_LEFT) { 
    dx = -5; 

    ImageIcon ii = new ImageIcon(this.getClass().getResource("oki.png")); 
    image = ii.getImage(); 
} 

if (key == KeyEvent.VK_RIGHT){ 
    dx = 5; 

    ImageIcon ii = new ImageIcon(this.getClass().getResource("oka.png")); 
    image = ii.getImage(); 
} 

if (key == KeyEvent.VK_SPACE) { 
    dy = -5; 
} 



if (key == KeyEvent.VK_DOWN) { 
    dy = 5; 
} 


} 

public void keyReleased(KeyEvent e) { 
int key = e.getKeyCode(); 


if (key == KeyEvent.VK_LEFT) { 
    dx = 0; 
} 

if (key == KeyEvent.VK_RIGHT){ 
    dx = 0; 
} 

if (key == KeyEvent.VK_SPACE) { 
    dy = 0; 
} 



if (key == KeyEvent.VK_DOWN) { 
    dy = 0; 
} 
    } 

}

第二部分

package Sprites; 

import java.awt.Color; 
import java.awt.Graphics; 
import java.awt.Graphics2D; 
import java.awt.Toolkit; 
import java.awt.event.ActionEvent; 
import java.awt.event.ActionListener; 
import java.awt.event.KeyAdapter; 
import java.awt.event.KeyEvent; 

import javax.swing.JPanel; 
import javax.swing.Timer; 

public class board extends JPanel implements ActionListener { 

    private Timer klocka; 
    private jumper jumper; 

    public board() { 

addKeyListener(new TAdapter()); 
setFocusable(true); 
setBackground(Color.WHITE); 
setDoubleBuffered(true); 

jumper = new jumper(); 

klocka = new Timer(5, this); 
klocka.start(); 
    } 

    public void paint(Graphics g) { 
super.paint(g); 

Graphics2D g2d = (Graphics2D)g; 
g2d.drawImage(jumper.getImage(), jumper.getX(), jumper.getY(), this); 

Toolkit.getDefaultToolkit().sync(); 
g.dispose(); 
    } 

    public void actionPerformed(ActionEvent e) { 
jumper.move(); 
repaint(); 
    } 

    private class TAdapter extends KeyAdapter { 

public void keyReleased(KeyEvent e) { 
    jumper.keyReleased(e); 
    } 
public void keyPressed(KeyEvent e) { 
    jumper.keyPressed(e); 
} 
    } 
}

第三部分

package Sprites; 

import javax.swing.JFrame; 

public class RType extends JFrame { 
    public RType() { 

add(new board()); 

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
setSize(800, 600); 
setLocationRelativeTo(null); 
setTitle("R - type"); 
setResizable(false); 
setVisible(true); 
    } 

public static void main(String[] args) { 
    new RType(); 

} 

}

我真的很感谢所有我能得到的帮助！

来源

2010-05-31 user354539

添加链接;如果不正确请回复。 – trashgod 2010-05-31 18:56:24

一些美容说明：软件包名称应该全部小写，类名（和构造函数）应该以大写字母开头。尝试与[Sun Java命名约定]（http://java.sun.com/docs/codeconv/html/CodeConventions.doc8.html#367）保持一致，以避免在快速扫描您的代码时在同伴Javaians中发生混淆和红鲱鱼。哦，也尽量不要将标签与空格混合。它应该是4个空格。 – BalusC 2010-05-31 18:59:28

This might help.这是一套教程，旨在帮助人们制作基于瓦片的游戏。包括侧面平台游戏。见http://www.tonypa.pri.ee/tbw/tut07.html。顺便说一句，你在角色移动方法中做了相当密集的图像加载。不要这样做。首先缓存图像。此外，你可以双缓冲你的画布，使其平滑。有关详细信息，请参阅代码here。

来源

2010-05-31 19:02:07

你如何让角色跳跃，无论是对象还是普通跳跃？

回答

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