java.util.TreeSet.clear() Method


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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

java_util_treeset.htm

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