hashset contains java

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Franco
25 Jan 2016
1import java.util.HashSet;
2public class HashSetContainsObjectMethodExample
3{
4   public static void main(String[] args)
5   {
6      HashSet<String> hs = new HashSet<String>();
7      hs.add("hello");
8      hs.add("world");
9      hs.add("java");
10      // check if element exists
11      boolean bool = hs.contains("world");
12      System.out.println("Is element 'world' exists: " + bool);
13   }
14}
Romeo
16 Feb 2018
1 HashSet<Integer> set = new HashSet<Integer>();      
2set.contains(110)//public boolean contains(Object o)  
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