很急啊！！我们java实验的题目，大家帮个忙吧

import java.util.Calendar;
import java.util.Date;
import javax.swing.*;
import java.awt.*;
class Example implements Runnable
{ static Calendar ca=Calendar.getInstance();
static Date date=new Date();
public Example()
{
new Thread(this).start();
}
public static void main(String args[])
{
Example ex=new Example();

}
public void run()
{
String strTime=ca.get(Calendar.HOUR_OF_DAY)+"时"+ca.get(Calendar.MINUTE)+"分"+ca.get(Calendar.SECOND)+"秒";
System.out.println(strTime);
System.out.printf("%4c%4c%4c%4c%4c%4c%4c\n",'日','一','二','三','四','五','六');

ca.setTime(date);
int wa=ca.get(Calendar.DAY_OF_WEEK)-1;
//System.out.println(wa);
int a[]=new int[wa+31];
for(int i=0;i<wa;i++)
{
a[i]=0;
}
for(int i=wa,n=1;i<wa+31;i+