java.util.HashSet.remove() Method

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Description

The remove(Object o) method is used to remove the specified element from this set if it is present.

Declaration

Following is the declaration for java.util.HashSet.remove() method.

public boolean remove(Object o)

Parameters

o − This is the object to be removed from this set, if present.

Return Value

The method call returns 'true' if the set contained the specified element.

Exception

NA

Example

The following example shows the usage of java.util.HashSet.remove()

package com.tutorialspoint;

import java.util.*;

public class HashSetDemo {
   public static void main(String args[]) {
      
      // create hash set
      HashSet <String> newset = new HashSet <String>();

      // populate hash set
      newset.add("Learning"); 
      newset.add("Easy");
      newset.add("Simply");  

      System.out.println("Values before remove: "+newset);

      // remove "Easy" from set
      boolean isremoved = newset.remove("Easy"); 

      System.out.println("Return value after remove: "+isremoved); 

      System.out.println("Values after remove: "+newset);     
   }    
}

Let us compile and run the above program, this will produce the following result.

Values before remove: [Learning, Simply, Easy]
Return value after remove: true
Values after remove: [Learning, Simply]