java图片向上移动代码 java图片随着窗口放大而放大

怎么编写java程序实现图片的移动(最好有例子)

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

相关问答

Q1: java语言里怎么让图象移动到指定位置啊,最好用一小段代码说明.

改变规制时候的X Y就行了.伪代码如下.

int x =0,y=0,;

x++; y++;

g.drawImage( "图片信息" , x, y,锚点);

大概就这样图片就动了.你想移动到哪加个判断就行了.

Q2: 一段图片从右到左移动的JAVASCRPT代码,帮忙改成图片从上到下移动

...想要图片从上到下.?,是自动移动吗？

是的话，用Marquee这个标签就行了,里面有控制方向的属性-

-,没必要写个方法

Q3: java 中移动图片，并且在按键盘的“回车”时，切换到另外一张图片！！请在我下面的代码改进！！！谢谢！！

你好，按照你的要求代码如下，修改java图片向上移动代码了三处

简单说明一下，就是加java图片向上移动代码了一个标识boolean，用true/false来表示显示第一张/第二张图片

import java.awt.*;

import java.awt.event.*;

import java.awt.event.KeyEvent;

import java.awt.event.KeyListener;

import javax.swing.*;

public class zhandou extends JFrame implements KeyListener {

Image roleImage, Image1;

int x, y;

public zhandou() {

super("MOVE");

Container c = getContentPane();

setSize(320, 240);

setVisible(true);

loadImage();

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

// setFocusable(true);

addKeyListener(this);

}

boolean key = true;// 加这样一个标识，true是第一张图片，false为第二张图片

public void paint(Graphics g) {

super.paint(g);

// drawRole(g);

if (key) {// 根据标识判断需要显示的图片

g.drawImage(roleImage, x, y, this);

} else {

g.drawImage(Image1, x, y, this);

}

}

public void loadImage() {

ImageIcon icon = new ImageIcon("tupian/草地.jpg");

roleImage = icon.getImage();

ImageIcon ic = new ImageIcon("tupian/right.gif");

Image1 = ic.getImage();

}

class Thread1 extends Thread {

}

/*

* private void drawRole(Graphics g) { g.drawImage(roleImage,100,100,this);

* }

*/

public void keyPressed(KeyEvent e) {

if (e.getKeyCode() == KeyEvent.VK_UP)

y = y - 5;

else if (e.getKeyCode() == KeyEvent.VK_DOWN)

y = y + 5;

else if (e.getKeyCode() == KeyEvent.VK_RIGHT)

x = x + 5;

else if (e.getKeyCode() == KeyEvent.VK_LEFT)

x = x - 5;

else if (e.getKeyCode() == KeyEvent.VK_ENTER)

key = !key;// 切换标识状态

repaint();

}

public void keyReleased(KeyEvent e) {

}

public void keyTyped(KeyEvent e) {

}

public static void main(String args[]) {

new zhandou();

}

}

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