写出一段程序，从备选字符串“red”、“green”、“blue”、“black”、“white”中随机选出3个不同的字符串，并打印到控制台

public class Test5 {   
  
    public static void main(String[] args) {   
        String temp[]={"red","green","blue","black","white"};   
        Set sets=new HashSet();    
        for(;;){   
            //产生随数   
            int i= new Random().nextInt(temp.length);   
            sets.add(temp[i]);   
            if(sets.size()>2){   
                break;   
            }   
        }   
        System.out.println(sets);   
    }   
  
}