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Java Program to check if a particular element exists in HashSet
Use the contains() method to check if a particular element exists −
Set<Integer> hs = new HashSet<Integer>(); hs.add(30); hs.add(67); hs.add(88); hs.add(33); hs.add(54); hs.add(90); hs.add(66); hs.add(79);
To check for let’s say, element 89, use the contains() method −
hs.contains(89));
The following is an example to check if a particular element exists in HashSet −
Example
import java.util.*;
public class Demo {
public static void main(String args[]) {
// create hash set
Set<Integer> hs = new HashSet<Integer>();
hs.add(30);
hs.add(67);
hs.add(88);
hs.add(33);
hs.add(54);
hs.add(90);
hs.add(66);
hs.add(79);
System.out.println("Elements in set = "+hs);
System.out.println("Does 89 in the set? "+hs.contains(89));
System.out.println("Does 67 in the set? "+hs.contains(67));
}
}Output
Elements in set = [33, 66, 67, 54, 88, 90, 30, 79] Does 89 in the set? false Does 67 in the set? True
Updated on: 30-Jul-2019
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