大家好,我是 Java 游戏编程新手,现在正在使用 Runnable 接口(interface)。由于某种原因,我的 run() 方法从未被调用,我不确定为什么。我尝试将许多 System.out.println 语句放在那里,但它们从未被打印。任何帮助将不胜感激!
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.Toolkit;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import javax.swing.JPanel;
public class GamePanel extends JPanel implements Runnable
{
private final int WIDTH = 160;
private final int HEIGHT = WIDTH/12 *9;
private final int RATIO = 3;
private Thread animator;
private volatile boolean running;
private volatile boolean gameOver;
private double FPS = 60D;
private double period = 1000/FPS;
private Image dbImage;
private Graphics dbg;
public GamePanel()
{
setPreferredSize(new Dimension(WIDTH *3, HEIGHT*3));
setBackground(Color.WHITE);
setFocusable(true);
requestFocus();
terminate();
}
public void addNotify()
{
super.addNotify();
startGame();
}
public void startGame()
{
System.out.println("Thread started");
animator = new Thread();
animator.start();
}
public void stopGame()
{
System.out.println("Thread stopped");
running = false;
}
public void run()
{
long beforeTime, timeDiff, sleepTime;
beforeTime = System.currentTimeMillis();
System.out.println(beforeTime);
running = true;
while (running)
{
System.out.println("Running");
gameUpdate();
gameRender();
paintScreen();
timeDiff = System.currentTimeMillis() - beforeTime;
sleepTime = (long) period - timeDiff;
if(sleepTime <= 0)
sleepTime = 5;
try
{
Thread.sleep(sleepTime);
}
catch (InterruptedException e)
{
e.printStackTrace();
}
beforeTime = System.currentTimeMillis();
}
System.exit(0);
}
public void gameRender()
{
if (dbImage == null)
{
dbImage = createImage(WIDTH, HEIGHT);
}
else
dbg = dbImage.getGraphics();
dbg.setColor(Color.WHITE);
dbg.fillRect(0, 0, WIDTH, HEIGHT);
}
public void paintComponent(Graphics g)
{
super.paintComponent(g);
g.drawImage(dbImage, 0, 0, null);
}
public void gameUpdate()
{
}
private void paintScreen()
{
Graphics g;
try
{
g = this.getGraphics();
if (g!= null && dbImage!= null)
g.drawImage(dbImage, 0, 0, null);
Toolkit.getDefaultToolkit().sync();
g.dispose();
}
catch (Exception e)
{
System.out.println("Error: " + e.getMessage());
}
}
public void terminate()
{
addKeyListener (new KeyAdapter()
{
public void keyPressed(KeyEvent e)
{
int keyCode = e.getKeyCode();
if (keyCode == KeyEvent.VK_ESCAPE)
{
stopGame();
}
}
});
}
}
import javax.swing.JFrame;
public class GameFrame extends JFrame
{
private final int WIDTH = 160;
private final int HEIGHT = WIDTH/12*9;
private final int RATIO = 3;
public GameFrame()
{
setTitle("User Input Game");
setSize(WIDTH*3,HEIGHT*3);
setLocationRelativeTo(null);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setResizable(false);
GamePanel mainPanel = new GamePanel();
add(mainPanel);
}
}
public class Main
{
public static void main(String[] args)
{
new GameFrame().setVisible(true);
}
}
最佳答案
您需要更改 startGame() 方法:
animator = new Thread(new GamePanel());
您需要将 Runnable(GamePanel 就是其中之一)传递到 Thread 构造函数中。然后,线程在启动时运行可运行对象。
关于java - "Run"方法不起作用,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/22750300/