java.util.TreeSet.clear() Method

Description

The clear() method is used to remove all of the elements from this set.

Declaration

Following is the declaration for java.util.TreeSet.clear() method.

public void clear()

Parameters

NA

Return Value

NA

Exception

NA

Example

The following example shows the usage of java.util.TreeSet.clear() method.

package com.tutorialspoint;

import java.util.Iterator;
import java.util.TreeSet;

public class TreeSetDemo {
   public static void main(String[] args) {

      // creating a TreeSet 
      TreeSet <Integer>treeadd = new TreeSet<Integer>();

      // adding in the tree set
      treeadd.add(12);
      treeadd.add(13);
      treeadd.add(14);
      treeadd.add(15);

      // create an iterator
      Iterator iterator;
      iterator = treeadd.iterator();

      // displaying the Tree set data
      System.out.println("Tree set data: ");     
      
      while (iterator.hasNext()) {
         System.out.println(iterator.next() + " ");
      }

      // clearing the set
      System.out.println("Clearing tree"); 
      treeadd.clear();
      System.out.println("Size of the tree: "+treeadd.size());      
   }     
}

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

Tree set data: 
12 
13 
14 
15 
Clearing tree
Size of the tree: 0

Kickstart Your Career

Get certified by completing the course

Get Started