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Get size of HashSet in Java
To get the size of HashSet, use the size() method. Let us create a HashSet and add elements −
Set<Integer> hs = new HashSet<Integer>(); hs.add(15); hs.add(71); hs.add(82); hs.add(89); hs.add(91);
Let us now use size() and get the size of HashSet −
hs.size()
The following is an example to get the size of HashSet −
Example
import java.util.*;
public class Demo {
public static void main(String args[]) {
Set<Integer> hs = new HashSet<Integer>();
hs.add(15);
hs.add(71);
hs.add(82);
hs.add(89);
hs.add(91);
System.out.println("Elements = "+hs);
System.out.println("Size of Set: "+hs.size());
hs.remove(82);
hs.remove(91);
System.out.println("
Updated Elements = "+hs);
System.out.println("Size of Set now: "+hs.size());
}
}Output
Elements = [82, 71, 89, 91, 15] Size of Set: 5 Updated Elements = [71, 89, 15] Size of Set now: 3
Updated on: 25-Jun-2020
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