Difference Between value() vs entrySet() Method in Java Map

// Java program demonstrating use of values() method

// Importing all input output classes
import java.io.*;
// Importing HashMap, Iterator, Map and Stream classes
// from the java.util package
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.stream.Stream;

// Class
class GFG {

    // Main driver method
    public static void main(String[] args)
    {
        // Creating a Map object
        // Declaring object of String and integer type
        Map<Integer, String> map = new HashMap<>();

        // Now, adding the elements to the object created
        // Elements here are key- \value pairs

        // Custom input objects
        map.put(1, "Geeks");
        map.put(2, "For");
        map.put(3, "Geeks");

        // Showcasing different ways to illustrate
        // values() method

        // Way 1 - Using iterator
        // Iterating over the object elements of the
        // showcasing the values() method using iterator

        // Creating an object of Integer type
        Iterator<String> itr = map.values().iterator();

        // Condition check which holds true till
        // there is single elementusing hasNext() method
        while (itr.hasNext()) {

            // Traversing across the elements
            // using next() method

            // Printing the elements in the object
            System.out.print(itr.next() + " ");
        }

        // New line
        System.out.println();

        // Way 2 - Using loops
        // Iterating over the elements using for-each loop
        // to showacase value() method
        for (String key : map.values()) {

            // Printing all the element in object
            // key-value pairs
            System.out.println(key);
        }

        // New line
        System.out.println();

        // Iterating over the values() method by
        // converting the Map to the string
        System.out.println(map.values().toString());
    }
}

// Java program demonstrating use of entrySet() method

//  Importing Map,Stream, hashMap and Iterator classes
// from the java.util package
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.stream.Stream;

// Class
class GFG {

    // Main driver method
    public static void main(String[] args)
    {
        // Creating an object of Map class
        // Declaring object of Integer and String type
        Map<Integer, String> map = new HashMap<>();

        // Now, adding the elements to the object
        // Here elements are key-value pairs to map

        // Custom input elements
        map.put(1, "Geeks");
        map.put(2, "For");
        map.put(3, "Geeks");

        // Now, proposing different cases in which we will
        // be iterating over the elements using entrySet()

        // Case 1
        // Iterating the key value pairs
        // using for each loop
        for (Map.Entry<Integer, String> entry :
             map.entrySet()) {

            // Corresponding key
            Integer key = (Integer)entry.getKey();

            // Corresponding pair
            String value = entry.getValue();

            // Printing all the corresponding key-value
            // pairs
            System.out.println(key + "=" + value);
        }

        // Case 2
        // Iterating the key-value pairs
        // using iterator
        Iterator<Map.Entry<Integer, String> > itr
            = map.entrySet().iterator();

        // Condition check using hasNext() method holding
        // true till there is single entry remaining
        while (itr.hasNext()) {

            // Go on printing key-value pairs
            System.out.println(itr.next());
        }

        // Case 3
        // Iterating and printing the key-value pairs
        // using Stream.of() method

        // Printing alongside by using scope resolution
        // operator
        Stream.of(map.entrySet().toArray())
            .forEach(System.out::println);
    }
}