The AbstractMap.values() method of AbstractMap class in Java is used to create a collection out of the values of the map. It basically returns a Collection view of the values in the AbstractMap.
Syntax:
AbstractMap.values()
Parameters: The method does not accept any parameters.
Return Value: The method is used to return a collection view containing all the values of the map.
Below programs are used to illustrate the working of AbstractMap.values() Method:
Program 1: Mapping String Values to Integer Keys.
// Java code to illustrate the values() method import java.util.*; public class Abstract_Map_Demo { public static void main(String[] args) { // Creating an empty AbstractMap AbstractMap<Integer, String> abs_map = new TreeMap<Integer, String>(); // Mapping string values to int keys abs_map.put(10, "Geeks"); abs_map.put(15, "4"); abs_map.put(20, "Geeks"); abs_map.put(25, "Welcomes"); abs_map.put(30, "You"); // Displaying the AbstractMap System.out.println("Initial Mappings are: " + abs_map); // Using values() to get the set view of values System.out.println("The collection is: " + abs_map.values()); }} |
Output:
Initial Mappings are: {10=Geeks, 15=4, 20=Geeks, 25=Welcomes, 30=You}
The collection is: [Geeks, 4, Geeks, Welcomes, You]
Program 2: Mapping Integer Values to String Keys.
// Java code to illustrate the values() method import java.util.*; public class Abstract_Map_Demo { public static void main(String[] args) { // Creating an empty AbstractMap AbstractMap<String, Integer> abs_map = new TreeMap<String, Integer>(); // Mapping int values to string keys abs_map.put("Geeks", 10); abs_map.put("4", 15); abs_map.put("Geeks", 20); abs_map.put("Welcomes", 25); abs_map.put("You", 30); // Displaying the AbstractMap System.out.println("Initial Mappings are: " + abs_map); // Using values() to get the set view of values System.out.println("The collection is: " + abs_map.values()); }} |
Output:
Initial Mappings are: {4=15, Geeks=20, Welcomes=25, You=30}
The collection is: [15, 20, 25, 30]
Note: The same operation can be performed with any type of Mappings with variation and combination of different data types.
