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Hashtable toString() Method in Java
  • Last Updated : 11 Dec, 2018

The java.util.Hashtable.toString() is an inbuilt method of Hashtable that is used to get a string representation of the objects of Hashtable in the form of a set of entries separated by “, “. So basically the toString() method is used to convert all the elements of Hashtable into String.

Syntax:

Hash_Table.toString()

Parameter: The method does not take any parameters.

Return value: The method returns the set consisting of the string representation of the elements of the hash table.

Below programs illustrate the working of java.util.Hashtable.toString() method:
Program 1:






// Java code to illustrate the toString() method
import java.util.*;
  
public class Hash_Table_Demo {
    public static void main(String[] args)
    {
  
        // Creating an empty Hashtable
        Hashtable<Integer, String> hash_table = 
                            new Hashtable<Integer, String>();
  
        // Inserting elements into the table
        hash_table.put(10, "Geeks");
        hash_table.put(15, "4");
        hash_table.put(20, "Geeks");
        hash_table.put(25, "Welcomes");
        hash_table.put(30, "You");
  
        // Displaying the Hashtable
        System.out.println("Initial table is: " + hash_table);
  
        // Displaying the string representaion
        System.out.println("The set is: " + hash_table.toString());
    }
}
Output:
Initial table is: {10=Geeks, 20=Geeks, 30=You, 15=4, 25=Welcomes}
The set is: {10=Geeks, 20=Geeks, 30=You, 15=4, 25=Welcomes}

Program 2:




// Java code to illustrate the toString() method
import java.util.*;
  
public class Hash_Table_Demo {
    public static void main(String[] args)
    {
  
        // Creating an empty Hashtable
        Hashtable<String, Integer> hash_table = 
                           new Hashtable<String, Integer>();
  
        // Inserting elements into the table
        hash_table.put("Geeks", 10);
        hash_table.put("4", 15);
        hash_table.put("Geeks", 20);
        hash_table.put("Welcomes", 25);
        hash_table.put("You", 30);
  
        // Displaying the Hashtable
        System.out.println("Initial Table is: " + hash_table);
  
        // Displaying the string representaion
        System.out.println("The set is: " + hash_table.toString());
    }
}
Output:
Initial Table is: {You=30, Welcomes=25, 4=15, Geeks=20}
The set is: {You=30, Welcomes=25, 4=15, Geeks=20}

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