Java 图像不移动
我的图像不移动。Java 图像不移动,java,swing,awt,keylistener,paintcomponent,Java,Swing,Awt,Keylistener,Paintcomponent,我的图像不移动。 以下是应用程序的完整代码: package Game; import java.awt.Color; import java.awt.Graphics; import java.awt.event.KeyAdapter; import java.awt.event.KeyEvent; import java.awt.event.KeyListener; import java.awt.image.BufferedImage; import java.io.File; impo
以下是应用程序的完整代码:
package Game;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class Game extends JPanel {
private static final long serialVersionUID = 1L;
private BufferedImage image;
public static final int WIDTH = 600;
public static final int HEIGHT = 500;
private int x = 1;
private int y = 1;
private static int dx;
private static int dy;
private boolean leftPressed = false;
private boolean rightPressed = false;
private boolean topPressed = false;
private boolean downPressed = false;
public static void main(String avg[]) throws IOException {
Game abc = new Game();
}
public Game() {
try {
JFrame frame = new JFrame();
image = ImageIO.read(new File(
"C:\\Users\\дНМ\\workspace\\Game\\image\\heroG.png"));
frame.setSize(WIDTH, HEIGHT);
frame.setVisible(true);
frame.getContentPane().add(this);
this.setBackground(Color.BLACK);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setTitle("Tittle - Game");
addKeyListener(new KeyInputHandler());
} catch (IOException ex) {
ex.printStackTrace();
}
}
public void move() {
x += dx;
y += dy;
if (x < 1) {
x = 1;
}
if (y < 1) {
y = 1;
}
}
public void update(long delta) {
if (leftPressed == true) {
x--;
}
if (rightPressed == true) {
x++;
}
}
public void update2(long delta) {
if (downPressed == true) {
y--;
}
if (topPressed == true) {
y++;
}
}
private class KeyInputHandler extends KeyAdapter {
public void keyPressed(KeyEvent e) {
if (e.getKeyCode() == KeyEvent.VK_LEFT) {
leftPressed = true;
dx = -1;
}
if (e.getKeyCode() == KeyEvent.VK_RIGHT) {
rightPressed = true;
dx = 1;
}
if (e.getKeyCode() == KeyEvent.VK_UP) {
topPressed = true;
dy = -1;
}
if (e.getKeyCode() == KeyEvent.VK_DOWN) {
downPressed = true;
dy = 1;
}
}
public void keyReleased(KeyEvent e) {
if (e.getKeyCode() == KeyEvent.VK_LEFT) {
leftPressed = false;
dx = 0;
}
if (e.getKeyCode() == KeyEvent.VK_RIGHT) {
rightPressed = false;
dx = 0;
}
if (e.getKeyCode() == KeyEvent.VK_UP) {
topPressed = false;
dy = 0;
}
if (e.getKeyCode() == KeyEvent.VK_DOWN) {
downPressed = false;
dy = 0;
}
}
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
g.drawImage(image, x, y, null);
}
}
打包游戏;
导入java.awt.Color;
导入java.awt.Graphics;
导入java.awt.event.KeyAdapter;
导入java.awt.event.KeyEvent;
导入java.awt.event.KeyListener;
导入java.awt.image.buffereImage;
导入java.io.File;
导入java.io.IOException;
导入javax.imageio.imageio;
导入javax.swing.JFrame;
导入javax.swing.JPanel;
公共类游戏扩展JPanel{
私有静态最终长serialVersionUID=1L;
私有缓冲图像;
公共静态最终整数宽度=600;
公共静态最终内部高度=500;
私有整数x=1;
私有整数y=1;
私有静态int-dx;
私有静态int-dy;
私有布尔leftPressed=false;
private boolean rightPressed=false;
private boolean topPressed=false;
private boolean downPressed=false;
公共静态void main(字符串平均值[])引发IOException{
游戏abc=新游戏();
}
公共游戏(){
试一试{
JFrame=新JFrame();
image=ImageIO.read(新文件(
“C:\\Users\\crmkМ\\workspace\\Game\\image\\heroG.png”);
框架尺寸(宽度、高度);
frame.setVisible(true);
frame.getContentPane().add(这个);
这个.背景(颜色.黑色);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setTitle(“title-Game”);
addKeyListener(新的KeyInputHandler());
}捕获(IOEX异常){
例如printStackTrace();
}
}
公开作废动议(){
x+=dx;
y+=dy;
if(x<1){
x=1;
}
if(y<1){
y=1;
}
}
公共无效更新(长增量){
if(leftPressed==true){
x--;
}
如果(右按==真){
x++;
}
}
公共无效更新2(长增量){
如果(按下==真){
y--;
}
如果(顶置==真){
y++;
}
}
私有类KeyInputHandler扩展了KeyAdapter{
按下公共无效键(按键事件e){
如果(例如getKeyCode()==KeyEvent.VK_左){
leftPressed=true;
dx=-1;
}
if(e.getKeyCode()==KeyEvent.VK_RIGHT){
rightspressed=true;
dx=1;
}
如果(例如getKeyCode()==KeyEvent.VK_UP){
压顶=正确;
dy=-1;
}
如果(例如getKeyCode()==KeyEvent.VK_DOWN){
downPressed=true;
dy=1;
}
}
公共无效密钥已释放(密钥事件e){
如果(例如getKeyCode()==KeyEvent.VK_左){
leftPressed=false;
dx=0;
}
if(e.getKeyCode()==KeyEvent.VK_RIGHT){
右压=假;
dx=0;
}
如果(例如getKeyCode()==KeyEvent.VK_UP){
压顶=假;
dy=0;
}
如果(例如getKeyCode()==KeyEvent.VK_DOWN){
按下=假;
dy=0;
}
}
}
@凌驾
受保护组件(图形g){
超级组件(g);
g、 drawImage(图像,x,y,空);
}
}
怎么了?请指出您可能需要添加的错误。首先:您的面板没有截取关键事件,请检查以下问题: Second:当按下一个键时,您可以更改变量
dx
和dy
,但您没有调用move()
方法
第三个在按下每个键后,您不会重新绘制
这些是修改:
游戏构造器
钥匙适配器
所有的节目,但当你按下按钮时图片不移动为什么你认为它应该移动?好吧,我写了一个移动的方法,但它们显然不起作用。。。你能告诉我出了什么问题吗?你从来没有重新粉刷过你的组件,我该如何使它工作?有什么要补充的吗?
public Game() {
try {
JFrame frame = new JFrame();
image = ImageIO.read(new File("Zombatar.jpg"));
frame.setSize(WIDTH, HEIGHT);
frame.setVisible(true);
frame.getContentPane().add(this);
this.setBackground(Color.BLACK);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setTitle("Tittle - Game");
addKeyListener(new KeyInputHandler());
//this is important to intercept key events
setFocusable(true);
requestFocusInWindow();
} catch (IOException ex) {
ex.printStackTrace();
}
}
private class KeyInputHandler extends KeyAdapter {
public void keyPressed(KeyEvent e) {
if (e.getKeyCode() == KeyEvent.VK_LEFT) {
dx = -1;
}
else if (e.getKeyCode() == KeyEvent.VK_RIGHT) {
dx = 1;
}
else if (e.getKeyCode() == KeyEvent.VK_UP) {
dy = -1;
}
else if (e.getKeyCode() == KeyEvent.VK_DOWN) {
dy = 1;
}
//first call move to update x and y and later repaint tha JPanel
move();
repaint();
}
}