SortedMap put() method in Java with Examples

The put() method of SortedMap interface in Java is used to associate the specified value with the specified key in this map.

Syntax:

V put(K key,
    V value)

Parameters: This method has two arguments:

• key: which is the left argument and
• value: which is the corresponding value of the key in the map.

Returns: This method returns previous value associated with the key if present, else return -1.

Note: The put() method in SortedMap is inherited from the Map interface in Java.

Below programs illustrate the implementation of int put() method:

Program 1:

// Java code to show the implementation of
// put method in SortedMap interface

import java.util.*;

public class GfG {

    // Driver code
    public static void main(String[] args)
    {

        // Initializing a SortedMap
        SortedMap<Integer, String> map
            = new TreeMap<>();

        map.put(1, "One");
        map.put(3, "Three");
        map.put(5, "Five");
        map.put(7, "Seven");
        map.put(9, "Ninde");

        System.out.println(map);
    }
}

Output:

{1=One, 3=Three, 5=Five, 7=Seven, 9=Ninde}

Program 2: Below is the code to show implementation of put().

// Java code to show the implementation of
// put method in SortedMap interface

import java.util.*;

public class GfG {

    // Driver code
    public static void main(String[] args)
    {

        // Initializing a SortedMap
        SortedMap<String, String> map
            = new TreeMap<>();

        map.put("1", "One");
        map.put("3", "Three");
        map.put("5", "Five");
        map.put("7", "Seven");
        map.put("9", "Ninde");

        System.out.println(map);
    }
}

Output:

{1=One, 3=Three, 5=Five, 7=Seven, 9=Ninde}

Reference: https://docs.oracle.com/javase/7/docs/api/java/util/Map.html#put(K, %20V)