AbstractMap values() Method in Java with Examples (original) (raw)

Last Updated : 26 Oct, 2018

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 `

// 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 `

// 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.

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