choose.java

模拟35选7摇奖 随机数问题 模拟35选7摇奖 随机数问题

//import java.util.TreeSet;

import java.util.*;
public class Choose {
	
public static void main (String[] args){

Choose r=new Choose();
Set set =r.ch();
Iterator it= set.iterator();
while(it.hasNext()){
	int i=((Integer) it.next()).intValue();
	System.out.print(i+"  ");
}
System.out.println();
	
	
}
public Set ch(){
  Random r = new Random();
  Set set = new TreeSet();
//    for(int i=0;i<7;i++)
//    {s.}
 while(set.size()<7)
  {int i = r.nextInt(35)+1;
   set.add(new Integer(i));
  
  }
	return set;
}
}