java中实现35选7的为随机，选出7个不重复的随机整数之hashmap去重

import java.util.HashMap;
import java.util.Map;
import java.util.Random;

public class test001 {

public static void main(String[] args) {
// TODO Auto-generated method stub
Map<Integer, Integer> a = new HashMap<Integer, Integer>();
Random b = new Random();

<span style="white-space:pre">		</span>//map用键值对的形式存储，键唯一，如果重复就会进行替换，
while (a.size() < 7) {
int c = b.nextInt(35) + 1;
a.put(c, c);
}
// 打印7个随机数
System.out.println(a);
for (int m : a.keySet()) {
System.out.print(a.get(m) + "\t");
}
}

}