Set remove() method in Java with Examples (original) (raw)

Last Updated : 31 Dec, 2018

The java.util.Set.remove(Object O) method is used to remove a particular element from a Set.Syntax:

boolean remove(Object O)

Parameters: The parameter O is of the type of element maintained by this Set and specifies the element to be removed from the Set.Return Value: This method returns True if the specified element is present in the Set otherwise it returns False. Below program illustrate the java.util.Set.remove(Object O) method:

Java `

// Java code to illustrate Set.remove() method

import java.util.*;

public class SetDemo { public static void main(String args[]) { // Creating an empty Set Set set = new HashSet();

    // Use add() method to add elements into the Set
    set.add("Welcome");
    set.add("To");
    set.add("Geeks");
    set.add("4");
    set.add("Geeks");

    // Displaying the Set
    System.out.println("Set: " + set);

    // Removing elements using remove() method
    set.remove("Geeks");
    set.remove("4");
    set.remove("Welcome");

    // Displaying the Set after removal
    System.out.println("Set after removing elements: "
                       + set);
}

}

`

Output:

Set: [4, Geeks, Welcome, To] Set after removing elements: [To]

Reference: https://docs.oracle.com/javase/7/docs/api/java/util/Set.html#remove(java.lang.Object)

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