java.util.Hashtable.clear() Method


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Description

The clear() method is used to clear this hashtable so that it contains no keys.

Declaration

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

public void clear()

Parameters

NA

Return Value

NA

Exception

NA

Example

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

Live Demo
package com.tutorialspoint;

import java.util.*;

public class HashTableDemo {
   public static void main(String args[]) {
      
      // create hash table 
      Hashtable htable = new Hashtable();

      // put values into the table
      htable.put(1, "A");
      htable.put(2, "B");
      htable.put(3, "C");
      htable.put(4, "D");

      // check table content
      System.out.println("Hash table content: "+htable);

      // clear the table
      htable.clear();

      // check content after clear
      System.out.println("Hash table content after clear: "+htable);      
   }    
}

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

Hash table content: {4=D, 3=C, 2=B, 1=A}
Hash table content after clear: {}

java_util_hashtable.htm

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