Question

怎么编写java程序实现图片的移动(最好有例子)

怎么编写java程序实现图片的移动(最好有例子)

Answer 1

import java.awt.Color;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;

import javax.swing.JFrame;

public class DrawTest extends JFrame {
private int x = 50;
private int y = 50;
private Image offScreenImage = null;

@Override
public void paint(Graphics g) {
Color c = g.getColor();
g.setColor(Color.BLACK);
g.fillOval(x, y, 30, 30);
g.setColor(c);

}

public void update(Graphics g) {
if (offScreenImage == null) {
offScreenImage = this.createImage(500, 500);
}
Graphics gOffScreen = offScreenImage.getGraphics();
Color c = gOffScreen.getColor();
gOffScreen.setColor(Color.GREEN);
gOffScreen.fillRect(0, 0, 500, 500);
gOffScreen.setColor(c);
paint(gOffScreen);
g.drawImage(offScreenImage, 0, 0, null);
}

public static void main(String[] args) {
DrawTest d = new DrawTest();

}

public DrawTest() {
init();
addKeyListener(new KeyAdapter() {
public void keyPressed(final KeyEvent e) {
int code = e.getKeyCode();
switch (code) {
case KeyEvent.VK_UP:
y -= 5;
break;
case KeyEvent.VK_RIGHT:
x += 5;
break;
case KeyEvent.VK_DOWN:
y += 5;
break;
case KeyEvent.VK_LEFT:
x -= 5;
break;
}
}
});
}

public void init() {
this.setDefaultCloseOperation(this.EXIT_ON_CLOSE);
this.setBackground(Color.GREEN);
this.setResizable(false);
this.setBounds(140, 140, 500, 500);
this.setVisible(true);
MyThread mt = new MyThread();
new Thread(mt).start();
}

class MyThread implements Runnable {

public void run() {
while (true) {
repaint();
try {
Thread.sleep(100);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}

}
以上

Answer 2

import java.applet.*;
import java.awt.*;
import javax.swing.*;
import java.net.*;

public class PhotoMove extends Applet {

private ImageIcon icon;
private int pointX,pointY;

public void init()
{
try
{
icon = new ImageIcon(getClass().getResource("T1.gif"));
}
catch(Exception e)
{
e.printStackTrace();
}
}

public void paint(Graphics g)
{
icon.paintIcon(this,g, pointX, pointY);
pointX = ++pointX%50;
pointY = ++pointY%50;

try
{
Thread.sleep(50);
}
catch(Exception e)
{
e.printStackTrace();
}

repaint();
}
}

这个是沿着斜下方移动的一个例子，移动范围可以通过改变pointX,pointY来调整，仅供参考。。。
具体的还要你自己发挥了

Answer 3

将图片放在标签里
通过键盘方向键事件改变标签的加载位置就得了