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 code to illustrate the get() methodimport 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 code to illustrate the get() methodimport 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
