Remove single element from a HashSet in Java

To remove a single element from a HashSet, use the remove() method.

First, create a HashSet −

HashSet hs = new HashSet();

Now, add elements to the HashSet −

hs.add("R"); hs.add("S"); hs.add("T"); hs.add("V"); hs.add("W"); hs.add("Y"); hs.add("Z");

Let us now remove an element −

hs.remove("R");

The following is an example to remove a single element from a HashSet −

Example

 Live Demo

import java.util.*; public class Demo { public static void main(String args[]) { HashSet hs = new HashSet(); // add elements to the hash set hs.add("R"); hs.add("S"); hs.add("T"); hs.add("V"); hs.add("W"); hs.add("Y"); hs.add("Z"); System.out.println(hs); // removing a single element hs.remove("R"); System.out.println(hs); // removing another element hs.remove("W"); System.out.println(hs); } }

Output

[R, S, T, V, W, Y, Z] [S, T, V, W, Y, Z] [S, T, V, Y, Z]