【正确答案】import java.awt.*;
import java.applet.*;
import java.awt.event.*;
public class ActiveImages extends Applet implements Runnable,ActionListener
{
Image iImages[]; //图像数组
Thread aThread;
int iFrame; //图像数组下标
int sleeptime; //参数,线程sleep时间
String graphfile; //图片文件名
int graphcount; //图片张数
AudioClip au; //定义一个声音对象
Button b1,b2;
public void init()
{
int i,j;
iFrame=0;
aThread=null;
sleeptime=Integer.parseInt(getParameter("sleeptime"));
graphfile = getParameter("graphfile");
graphcount = Integer.parseInt(getParameter("graphcount"));
iImages = new Image[graphcount];
String fname = graphfile;
j = fname.indexOf(".");
for (i=0;i
【答案解析】