[JAVA] 簡易鍵盤控制人物行走

※ 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16個人物行走圖檔。
※ 程式碼延續自[JAVA]圖片移動小範例
※ 參考自【纯JAVA语言做RPG游戏】3.地图碰撞检测和角色行走的实现 -  - ITeye博客。
※ 已知bug：
1. 人物會閃爍。
2. 若按下不是設為條件的按鍵，人物會消失。

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 CharacterMove extends JFrame implements KeyListener {
	private Container content;
	private JPanel mainPane;
	protected Image[] img_up, img_down, img_left, img_right;
	protected Image img_stand_up, img_stand_down, img_stand_left, img_stand_right;
	Graphics g;
	final int INIT_X_POS = 400, INIT_Y_POS = 150; // 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 = 96, imgH = 96, up_count = 5, down_count = 5,
	left_count = 5, right_count = 5, towards = 2,
	up_now = 0, down_now = 0, left_now = 0, right_now = 0;
	boolean up = false, down = false, left = false, right = false;
	public CharacterMove() throws InterruptedException {
	/* 視窗設定 */
	super("test");
	this.setDefaultCloseOperation(EXIT_ON_CLOSE);
	this.setResizable(false);
	this.setBounds(200, 150, 1000, 500);
	content = this.getContentPane();
	mainPane = new JPanel();
	mainPane.setLayout(new BorderLayout());
	content.add(mainPane, BorderLayout.CENTER);
	this.setVisible(true);
	/* 圖片 */
	MediaTracker t = new MediaTracker(this);
	img_up = new Image[4];
	img_down = new Image[4];
	img_left = new Image[4];
	img_right = new Image[4];
	int a = 12, b = 0, c = 4, d = 8, temp = 0;
	for(int i = 0; i < 4; ++i) {
	img_up[i] = Toolkit.getDefaultToolkit().getImage("src\\p\\"+a+".png");
	img_down[i] = Toolkit.getDefaultToolkit().getImage("src\\p\\"+b+".png");
	img_left[i] = Toolkit.getDefaultToolkit().getImage("src\\p\\"+c+".png");
	img_right[i] = Toolkit.getDefaultToolkit().getImage("src\\p\\"+d+".png");
	t.addImage(img_up[i], temp);
	t.addImage(img_down[i], ++temp);
	t.addImage(img_left[i], temp+2);
	t.addImage(img_right[i], temp+3);
	++a; ++b; ++c; ++d; temp += 4;
	}
	img_stand_up = Toolkit.getDefaultToolkit().getImage("src\\p\\"+16+".png");
	t.addImage(img_stand_up, 16);
	img_stand_down = Toolkit.getDefaultToolkit().getImage("src\\p\\"+17+".png");
	t.addImage(img_stand_down, 16);
	img_stand_left = Toolkit.getDefaultToolkit().getImage("src\\p\\"+18+".png");
	t.addImage(img_stand_left, 16);
	img_stand_right = Toolkit.getDefaultToolkit().getImage("src\\p\\"+19+".png");
	t.addImage(img_stand_right, 16);
	t.waitForAll();
	g = mainPane.getGraphics();
	g.drawImage(img_stand_down, imgX, imgY, imgW, imgH, null);
	this.addKeyListener(this);
	}
	public static void main(String[] args) throws InterruptedException {
	new CharacterMove();
	}
	public void run() {
	while (true) {
	moveover();
	try {Thread.sleep(20);}
	catch (InterruptedException e) {e.printStackTrace();}
	}
	}
	public void moveover() { //若是一輪已執行完
	if(up) {
	if (up_count >= 13) {up_count = 0;}
	}
	else if(down) {
	if (down_count >= 13) {down_count = 0;}
	}
	else if(left) {
	if(left_count >= 13) {left_count = 0;}
	}
	else if(right) {
	if(right_count >= 13) {right_count = 0;}
	}
	}
	public void move() { //判斷移動 切換圖片
	if(up) {
	if(up_count < 1) {
	up_now = 0;
	g.drawImage(img_up[0], imgX, imgY, imgW, imgH, null);
	}
	else if(up_count < 5) {
	up_now = 1;
	g.drawImage(img_up[1], imgX, imgY, imgW, imgH, null);
	}
	else if(up_count < 9) {
	up_now = 2;
	g.drawImage(img_up[2], imgX, imgY, imgW, imgH, null);
	}
	else {
	up_now = 3;
	g.drawImage(img_up[3], imgX, imgY, imgW, imgH, null);
	}
	}
	else if(down) {
	if(down_count < 1) {
	down_now = 0;
	g.drawImage(img_down[0], imgX, imgY, imgW, imgH, null);
	}
	else if(down_count < 5) {
	down_now = 1;
	g.drawImage(img_down[1], imgX, imgY, imgW, imgH, null);
	}
	else if(down_count < 9) {
	down_now = 2;
	g.drawImage(img_down[2], imgX, imgY, imgW, imgH, null);
	}
	else {
	down_now = 3;
	g.drawImage(img_down[3], imgX, imgY, imgW, imgH, null);
	}
	}
	else if(left) {
	if(left_count < 1) {
	left_now = 0;
	g.drawImage(img_left[0], imgX, imgY, imgW, imgH, null);
	}
	else if(left_count < 5) {
	left_now = 1;
	g.drawImage(img_left[1], imgX, imgY, imgW, imgH, null);
	}
	else if(left_count < 9) {
	left_now = 2;
	g.drawImage(img_left[2], imgX, imgY, imgW, imgH, null);
	}
	else {
	left_now = 3;
	g.drawImage(img_left[3], imgX, imgY, imgW, imgH, null);
	}
	}
	else if(right) {
	if(right_count < 1) {
	right_now = 0;
	g.drawImage(img_right[0], imgX, imgY, imgW, imgH, null);
	}
	else if(right_count < 5) {
	right_now = 1;
	g.drawImage(img_right[1], imgX, imgY, imgW, imgH, null);
	}
	else if(right_count < 9) {
	right_now = 2;
	g.drawImage(img_right[2], imgX, imgY, imgW, imgH, null);
	}
	else {
	right_now = 3;
	g.drawImage(img_right[3], imgX, imgY, imgW, imgH, null);
	}
	}
	}
	public void moveendtonext() { //角色所面向之方向
	if(towards == 1) { //如果角色最後朝上
	up_now = 3;
	g.drawImage(img_up[3], imgX, imgY, imgW, imgH, null);
	}
	else if(towards == 2) { //如果朝下
	down_now = 3;
	g.drawImage(img_down[3], imgX, imgY, imgW, imgH, null);
	}
	else if(towards == 3) { //如果朝左
	left_now = 3;
	g.drawImage(img_left[3], imgX, imgY, imgW, imgH, null);
	}
	else if(towards == 4) { //如果朝右
	right_now = 3;
	g.drawImage(img_right[3], imgX, imgY, imgW, imgH, null);
	}
	}
	public void notmove() { //當角色停下來時
	if(towards == 1) { //如果角色最後朝上
	up_now = 3;
	g.drawImage(img_stand_up, imgX, imgY, imgW, imgH, null);
	}
	else if(towards == 2) { //如果朝下
	down_now = 3;
	g.drawImage(img_stand_down, imgX, imgY, imgW, imgH, null);
	}
	else if(towards == 3) { //如果朝左
	left_now = 3;
	g.drawImage(img_stand_left, imgX, imgY, imgW, imgH, null);
	}
	else if(towards == 4) { //如果朝右
	right_now = 3;
	g.drawImage(img_stand_right, imgX, imgY, imgW, imgH, null);
	}
	}
	public void keyPressed(KeyEvent e) {
	moveover();
	notmove();
	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
	left = true;
	imgX -= ((imgX - SpeedX) >= 0 ? SpeedX : imgX);
	left_count++;
	g.drawImage(img_left[left_now], imgX, imgY, imgW, imgH, null);
	}
	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
	right = true;
	imgX += ((imgX + imgW + SpeedX) <= this.getWidth() ? SpeedX : (this.getWidth() - imgX - imgW));
	right_count++;
	g.drawImage(img_right[right_now], imgX, imgY, imgW, imgH, null);
	}
	if(key == KeyEvent.VK_UP) {
	up = true;
	imgY -= ((imgY - SpeedY) >= 0 ? SpeedY : imgY);
	up_count++;
	g.drawImage(img_up[up_now], imgX, imgY, imgW, imgH, null);
	}
	if(key == KeyEvent.VK_DOWN) {
	down = true;
	imgY += ((imgY + imgH + SpeedY) <= this.getHeight() ? SpeedY : (this.getHeight() - imgY - imgH));
	down_count++;
	g.drawImage(img_down[down_now], imgX, imgY, imgW, imgH, null);
	}
	/* 沒有作邊界判定 */
	if(key == KeyEvent.VK_A) {
	left = true;
	imgX -= SpeedX;
	left_count++;
	g.drawImage(img_left[left_now], imgX, imgY, imgW, imgH, null);
	}
	if(key == KeyEvent.VK_D) {
	right = true;
	imgX += SpeedX;
	right_count++;
	g.drawImage(img_right[right_now], imgX, imgY, imgW, imgH, null);
	}
	if(key == KeyEvent.VK_W) {
	up = true;
	imgY -= SpeedY;
	up_count++;
	g.drawImage(img_up[up_now], imgX, imgY, imgW, imgH, null);
	}
	if(key == KeyEvent.VK_S) {
	down = true;
	imgY += SpeedY;
	down_count++;
	g.drawImage(img_down[down_now], imgX, imgY, imgW, imgH, null);
	}
	notmove();
	g.clearRect(imgX, imgY, imgW, imgH);
	move();
	}
	public void keyReleased(KeyEvent e) {
	moveover();
	g.drawImage(img_stand_down, imgX, imgY, imgW, imgH, null);
	g.clearRect(imgX, imgY, imgW, imgH);
	int key = e.getKeyCode();
	if (key == KeyEvent.VK_LEFT) {
	left = false;
	towards = 3;
	}
	if (key == KeyEvent.VK_RIGHT) {
	right = false;
	towards = 4;
	}
	if (key == KeyEvent.VK_UP) {
	up = false;
	towards = 1;
	}
	if (key == KeyEvent.VK_DOWN) {
	down = false;
	towards = 2;
	}
	if (key == KeyEvent.VK_A) {
	left = false;
	towards = 3;
	}
	if (key == KeyEvent.VK_D) {
	right = false;
	towards = 4;
	}
	if (key == KeyEvent.VK_W) {
	up = false;
	towards = 1;
	}
	if (key == KeyEvent.VK_S) {
	down = false;
	towards = 2;
	}
	moveendtonext();
	g.clearRect(imgX, imgY, imgW, imgH);
	notmove();
	}
	public void keyTyped(KeyEvent arg0) {}
	}

view raw CharacterMove.java hosted with ❤ by GitHub

結果如下：