Java中HashSet使用代码演示，javahashset,import java.

Java中HashSet使用代码演示，javahashset,import java.

import java.util.HashSet;public class myHashsetExample {   public static void main(String[] args) {      HashSet<String> languages = new HashSet<String>();      languages.add("hindi");      languages.add("english");      languages.add("spanish");      System.out.println("The number of languages is " + languages.size());      for (String name : languages) {         System.out.println(name);      }      languages.remove("hindi");      languages.add("tamil");      String name = "hindi";      if (languages.contains(name)) {         System.out.println(name + " is in the collection.");      } else {         System.out.println(name + " is not in the collection.");      }      for (String n : languages) {         System.out.println(n);      }      languages.clear();      System.out.println("The number of languages is " + languages.size());   }}