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TreeSet remove() Method in Java

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  • Last Updated : 26 Nov, 2018
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The Java.util.TreeSet.remove(Object O) method is to remove a particular element from a Tree set.

Syntax:

TreeSet.remove(Object O)

Parameters: The parameter O is of the type of Tree set and specifies the element to be removed from the set.

Return Value: This method returns True if the element specified in the parameter is initially present in the Set and is successfully removed otherwise it returns False.

Below program illustrate the Java.util.TreeSet.remove() method:




// Java code to illustrate remove()
import java.util.*;
import java.util.TreeSet;
  
public class TreeSetDemo {
    public static void main(String args[])
    {
        // Creating an empty TreeSet
        TreeSet<String> tree = new TreeSet<String>();
  
        // Use add() method to add elements into the Set
        tree.add("Welcome");
        tree.add("To");
        tree.add("Geeks");
        tree.add("4");
        tree.add("Geeks");
        tree.add("TreeSet");
  
        // Displaying the TreeSet
        System.out.println("TreeSet: " + tree);
  
        // Removing elements using remove() method
        tree.remove("Geeks");
        tree.remove("4");
        tree.remove("TreeSet");
  
        // Displaying the TreeSet after removal
        System.out.println("New TreeSet: " + tree);
    }
}

Output:

TreeSet: [4, Geeks, To, TreeSet, Welcome]
New TreeSet: [To, Welcome]
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