import java.util.HashSet;
import java.util.Iterator;
import java.util.Random;
public class Set {
public static void main(String[] args) {
// HashSet
HashSet<String> hs = new HashSet<String>();
hs.add("a");
hs.add("b");
hs.add("n");
hs.add("1");
System.out.println(hs);
// 遍历
Iterator it = hs.iterator();
while (it.hasNext()) {
System.out.println(it.next());
}
System.out.println("--------------");
//foreach
for (String str : hs) {
System.out.println(str);
}
System.out.println("------------------");
Random R =new Random();
HashSet<Integer> hs1 = new HashSet<Integer>();
while(hs1.size()<10){
int res = R.nextInt(20)+1;
hs1.add(res);
}
System.out.println(hs1);
}
}
HashSet创建对象及遍历
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转载自blog.csdn.net/xiaoblank/article/details/81841650
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