Question

为什么这不起作用？我创建了一个动画循环的方法，两个图片称为animation（），我想把它放在paint方法中。我该怎么做？

import java.applet.*;
import java.awt.*;

public class Slot_Machine extends Applet
    {
    Image back;
    int coin=10;
    // Place instance variables here

    public void init ()
    {
        back= getImage(getDocumentBase(),"Images/Background/Slot Machine.png");
        // Place the body of the initialization method here
    } // init method

    public void animation(Graphics g)
    {
    Image Title1,Title2;
    Title1= getImage(getDocumentBase(),"Images/Title Animation/Title 1.png");
    Title2= getImage(getDocumentBase(),"Images/Title Animation/Title 2.png");
    while(true){
    g.drawImage(Title2,200,0,this);
    { try { Thread.currentThread().sleep(2000); } 
                catch ( Exception e ) { } }
    g.drawImage(Title1,200,0,this);
    { try { Thread.currentThread().sleep(2000); } 
                catch ( Exception e ) { } }
    }//end while(true) loop
    }//end animation

    public void paint (Graphics g)
    {   
        g.drawImage(back,0,0,this);
        animation(); //FROM THE METHOD ABOVE, WHY DOESNT THIS WORK? HOW DO I FIX THIS?
        String coins  = String.valueOf(coin);
        g.setColor(Color.white);
        g.setFont(new Font("Impact",Font.PLAIN,30));
        g.drawString(coins,405,350);
        // Place the body of the drawing method here
    } // paint method
}

Answer 1

你的animation()方法中有一个无限循环，这意味着paint()永远不会返回，这导致线程尝试启动applet挂起，等待paint()到返回。

如果要在后台运行永久循环动画，请尝试在另一个线程中执行此操作。看看ExecutorService。

如何创建动画方法并将其放在paint方法中？我的代码不起作用

1 个答案: