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Java TreeSet remove() Method with Example

TreeSet Class remove() method: Here, we are going to learn about the remove() method of TreeSet Class with its syntax and example.
Submitted by Preeti Jain, on February 20, 2020

TreeSet Class remove() method

• remove() method is available in java.util package.
• remove() method is used to remove the given object (ob) when exists in this TreeSet.
• remove() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.
• remove() method may throw an exception at the time of removing an object.
  • ClassCastException: This exception may throw when the given parameter is incompatible.
  • NullPointerException: This exception may throw when the given parameter is null exists.

Syntax:

    public boolean remove(Object ob);

Parameter(s):

• Object ob – represents the object (ob) to be remove from this TreeSet.

Return value:

The return type of the method is boolean, it returns true when the given object (ob) is to be removed successfully otherwise it returns false.

Example:

// Java program to demonstrate the example 
// of boolean remove(Object ob)  method of TreeSet 

import java.util.*;

public class RemoveOfTreeSet {
    public static void main(String[] args) {
        // Instantiates a TreeSet object
        TreeSet < String > tree_set = new TreeSet < String > ();

        // By using add() method is to add
        // the given object of this TreeSet 
        tree_set.add("C");
        tree_set.add("C++");
        tree_set.add("JAVA");
        tree_set.add("PHP");
        tree_set.add("SFDC");

        // Display TreeSet
        System.out.println("TreeSet: " + tree_set);

        // By using remove() method is to
        // remove the given object exists in 
        // this TreeSet
        boolean status = tree_set.remove("PHP");

        // Display status
        System.out.println("tree_set.remove(PHP): " + status);

        // Display Modified TreeSet
        System.out.println("Modified TreeSet: " + tree_set);
    }
}

Output

TreeSet: [C, C++, JAVA, PHP, SFDC]
tree_set.remove(PHP): true
Modified TreeSet: [C, C++, JAVA, SFDC]