HashSet的使用

xiaoxiao2021-03-25 109

import java.util.HashSet; import java.util.Iterator; public class SetDemo { public static void main(String[] args) { HashSet<String> hSet = new HashSet<>(); hSet.add("one"); hSet.add("two"); hSet.add("three"); hSet.add("zero"); System.out.println(hSet.contains("three")); Iterator<String> iterator = hSet.iterator(); while (iterator.hasNext()) { String string = (String) iterator.next(); System.out.println(string); } } }

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