actionListener在调用frm Jframe时在JPanel上执行两次]
Posted
tags:
篇首语：本文由小常识网(cha138.com)小编为大家整理，主要介绍了actionListener在调用frm Jframe时在JPanel上执行两次]相关的知识，希望对你有一定的参考价值。
这是我的主班代码
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.concurrent.TimeUnit;
import javax.swing.Timer;
public class Pacman extends JFrame implements ActionListener, KeyListener{
public static Dimension dim = Toolkit.getDefaultToolkit().getScreenSize();
public static int FRAME_HEIGHT = (int)(dim.height-dim.height/5);
public static int FRAME_WIDTH = (int)(dim.width-dim.width/5);
public static Pacman frame = new Pacman();
public static Game gameInterface = new Game();
public static Timer timer;
public Pacman() {
super("Pac-man");
timer = new Timer(175, this);
timer.start();
addKeyListener(this);
}
public static void main(String[] args) {
ImageIcon frameIcon = new ImageIcon("Icon.png");
frame.setSize(FRAME_WIDTH,FRAME_HEIGHT);
frame.setIconImage(frameIcon.getImage());
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
frame.setResizable(false);
frame.setContentPane(gameInterface);
gameInterface.requestFocus();
gameInterface.setFocusable(true);
Dimension dim = Toolkit.getDefaultToolkit().getScreenSize();
int JframeX = (dim.width-FRAME_WIDTH)/2;
int JframeY = (dim.height-FRAME_HEIGHT)/2;
frame.setLocation(JframeX, JframeY);
}
public void keyTyped(KeyEvent e) {
}
public void keyPressed(KeyEvent e) {
}
public void keyReleased(KeyEvent e) {
}
public void paint(Graphics g) {
super.paint(g);
}
public void actionPerformed(ActionEvent ev){
repaint();
}
}
这是我的游戏类的代码
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.concurrent.TimeUnit;
import javax.swing.Timer;
public class Game extends JPanel implements ActionListener, KeyListener{
public static Dimension dim = Toolkit.getDefaultToolkit().getScreenSize();
public static int FRAME_HEIGHT = (int)(dim.height-dim.height/5);
public static int FRAME_WIDTH = (int)(dim.width-dim.width/5);
public static Game gamePanel = new Game();
public static Timer timer;
public static boolean gameExit = false;
public static int animCounter = 0, imgPacmanX1 = 840, imgPacmanY1 = 0, imgPacmanX2 = 890, imgPacmanY2 = 50;
public Game() {
timer = new Timer(500, this);
timer.start();
addKeyListener(this);
}
public static void main(String[] args) {
}
public void keyTyped(KeyEvent e) {
}
public void keyPressed(KeyEvent e) {
}
public void keyReleased(KeyEvent e) {
}
public void paintComponent(Graphics g) {
super.paintComponent(g);
ImageIcon animations = new ImageIcon("Pacman_Animations.png");
g.setColor(Color.BLUE);
g.fillRect(0, 0, FRAME_WIDTH, FRAME_HEIGHT);
g.drawImage(animations.getImage(), 150, 200, 200, 250, imgPacmanX1, imgPacmanY1, imgPacmanX2, imgPacmanY2, null);
}
public void actionPerformed(ActionEvent ev){
if(animCounter == 2){
imgPacmanY1 = 0;
imgPacmanY2 = 50;
animCounter = 0;
}
else{
imgPacmanY1 += 50;
imgPacmanY2 += 50;
animCounter += 1;
}
repaint();
System.out.print(imgPacmanY1 + " " + imgPacmanY2 + " ");
}
}
如果我单独运行游戏类，则ActionListener可以正常工作，并且只能执行一次，但是从我的主类调用后，actionListener可以执行两次，动画开始跳过帧。
我希望为pacman sprite制作动画，但是当我的计时器调用actionperformed更新图像时，它会执行两次并跳过动画，这是我的主类import java.awt。*的代码； ...
Timer，每个都触发一个repaint，并且……欢迎来到您的体系结构为何出错的奇妙世界。以上是关于actionListener在调用frm Jframe时在JPanel上执行两次]的主要内容，如果未能解决你的问题，请参考以下文章
在重定向[重复]之前，PrimeFaces命令按钮未调用actionListener
爪哇摇摆；两个类，在哪里放置 if 语句和新的 actionlistener？
当有人尝试使用 WifiP2PManager.connect(Channel, WifiP2pConfig,ActionListener) 进行连接时，会调用哪个方法？