[JAVA] 圖片移動小範例

※ 此程式碼並非優化版本，僅供個人學習用途，若有任何問題請告知。

※ 準備1個jpg圖檔：1.jpg。
※ 參考自java图片移动（键盘控制） - CSDN博客。

程式碼如下：

	import java.awt.BorderLayout;
	import java.awt.Container;
	import java.awt.Graphics;
	import java.awt.Image;
	import java.awt.MediaTracker;
	import java.awt.Toolkit;
	import java.awt.event.KeyEvent;
	import java.awt.event.KeyListener;
	import javax.swing.JFrame;
	import javax.swing.JPanel;
	public class PictureMove extends JFrame implements KeyListener {
	private Container content;
	private JPanel mainPane;
	protected Image img = null;
	Graphics g;
	final int INIT_X_POS = 250, INIT_Y_POS = 100; //圖片初始位址
	//X移動, Y移動, 圖片X, 圖片Y, 圖片寬度, 圖片高度
	int SpeedX = 15, SpeedY = 15, imgX = INIT_X_POS,
	imgY = INIT_Y_POS, imgW = 100, imgH = 100;
	public PictureMove() throws InterruptedException {
	/*視窗設定*/
	super("test");
	this.setDefaultCloseOperation(EXIT_ON_CLOSE);
	this.setResizable(false);
	this.setBounds(350, 200, 650, 350);
	content = this.getContentPane();
	mainPane = new JPanel();
	mainPane.setLayout(new BorderLayout());
	content.add(mainPane, BorderLayout.CENTER);
	this.setVisible(true);
	/*圖片*/
	img = Toolkit.getDefaultToolkit().getImage("src\\M\\p\\1.png");
	g = mainPane.getGraphics();
	MediaTracker t = new MediaTracker(this);
	t.addImage(img, 0);
	t.waitForAll();
	g.drawImage(img, imgX, imgY, imgW, imgH, null);
	this.addKeyListener(this);
	}
	public static void main(String[] args) throws InterruptedException {new PictureMove();}
	public void keyPressed(KeyEvent e) {
	g.drawImage(img, imgX, imgY, imgW, imgH, null);
	g.clearRect(imgX, imgY, imgW, imgH);
	int key = e.getKeyCode();
	/*有作邊界判定*/
	if(key == KeyEvent.VK_LEFT) { //如(圖片的X位置-移動位置數)小於0　則等同於超出邊界
	imgX -= ((imgX - SpeedX) >= 0 ? SpeedX : imgX);}
	if(key == KeyEvent.VK_RIGHT) { //如(圖片的X位置+圖片寬度+移動位置數)大於視窗寬度　則等同於超出邊界
	imgX += ((imgX + imgW + SpeedX) <= this.getWidth() ? SpeedX : (this.getWidth() - imgX - imgW));}
	if(key == KeyEvent.VK_UP) {
	imgY -= ((imgY - SpeedY) >= 0 ? SpeedY : imgY);}
	if(key == KeyEvent.VK_DOWN) {
	imgY += ((imgY + imgH + SpeedY) <= this.getHeight() ? SpeedY : (this.getHeight() - imgY - imgH));}
	/*沒有作邊界判定*/
	if(key == KeyEvent.VK_A) {imgX -= SpeedX;}
	if(key == KeyEvent.VK_D) {imgX += SpeedX;}
	if(key == KeyEvent.VK_W) {imgY -= SpeedY;}
	if(key == KeyEvent.VK_S) {imgY += SpeedY;}
	g.drawImage(img, imgX, imgY, imgW, imgH, null);
	}
	public void keyReleased(KeyEvent arg0) {}
	public void keyTyped(KeyEvent arg0) {}
	}

view raw PictureMove.java hosted with ❤ by GitHub

結果如下：