Dictionary get() Method in Java with Examples

Last Updated : 27 Dec, 2018

The get() method of Dictionary class is used to retrieve or fetch the value mapped by a particular key mentioned in the parameter. It returns NULL when the dictionary contains no such mapping for the key. Syntax:

DICTIONARY.get(Object key_element)

Parameters: The method takes one parameter key_element of object type and refers to the key whose associated value is supposed to be fetched. Return Value: The method returns the value associated with the key_element in the parameter. Below programs are used to illustrate the working of java.util.Dictionary.get() Method: Program 1:

Java

// Java code to illustrate the get() method
import java.util.*;

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

        // Creating an empty Dictionary
        Dictionary<Integer, String> dict
            = new Hashtable<Integer, String>();

        // Inserting the values into dictionary
        dict.put(10, "Geeks");
        dict.put(15, "4");
        dict.put(20, "Geeks");
        dict.put(25, "Welcomes");
        dict.put(30, "You");

        // Displaying the Dictionary
        System.out.println("Initial Dictionary is: " + dict);

        // Getting the value of 25
        System.out.println("The Value is: " + dict.get(25));

        // Getting the value of 10
        System.out.println("The Value is: " + dict.get(10));
    }
}

Output:

Initial Dictionary is: {10=Geeks, 20=Geeks, 30=You, 15=4, 25=Welcomes}
The Value is: Welcomes
The Value is: Geeks

Program 2:

Java

// Java code to illustrate the get() method
import java.util.*;

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

        // Creating an empty Dictionary
        Dictionary<String, Integer> dict
            = new Hashtable<String, Integer>();

        // Inserting the values into dictionary
        dict.put("Geeks", 10);
        dict.put("4", 15);
        dict.put("Geeks", 20);
        dict.put("Welcomes", 25);
        dict.put("You", 30);

        // Displaying the Dictionary
        System.out.println("Initial Dictionary is: "
                           + dict);

        // Getting the value of 25
        System.out.println("The Value is: "
                           + dict.get("Geeks"));

        // Getting the value of 10
        System.out.println("The Value is: "
                           + dict.get(20));
    }
}

Output:

Initial Dictionary is: {You=30, Welcomes=25, 4=15, Geeks=20}
The Value is: 20
The Value is: null

Dictionary elements() Method in Java with Examples

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