SortedMap putAll() method in Java with Examples

The putAll() method of SortedMap interface in Java is used to copy all of the mappings from the specified SortedMap to this SortedMap.

Syntax:

void putAll(Map m)

Parameters: This method has the only argument map m which contains key-value mappings to be copied to given SortedMap.



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

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

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

Program 1:

filter_none

edit
close

play_arrow

link
brightness_4
code

// Java code to show the implementation of
// putAll 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, "Nine");
        System.out.println(map);
  
        SortedMap<Integer, String> mp
            = new TreeMap<>();
  
        mp.put(10, "Ten");
        mp.put(30, "Thirty");
        mp.put(50, "Fifty");
  
        map.putAll(mp);
  
        System.out.println(map);
    }
}

chevron_right


Output:

{1=One, 3=Three, 5=Five, 7=Seven, 9=Nine}
{1=One, 3=Three, 5=Five, 7=Seven, 9=Nine, 10=Ten, 30=Thirty, 50=Fifty}

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

filter_none

edit
close

play_arrow

link
brightness_4
code

// Java code to show the implementation of
// putAll 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", "Nine");
        System.out.println(map);
  
        SortedMap<String, String> mp
            = new TreeMap<>();
  
        mp.put("10", "Ten");
        mp.put("30", "Thirty");
        mp.put("50", "Fifty");
  
        map.putAll(mp);
  
        System.out.println(map);
    }
}

chevron_right


Output:

{1=One, 3=Three, 5=Five, 7=Seven, 9=Nine}
{1=One, 10=Ten, 3=Three, 30=Thirty, 5=Five, 50=Fifty, 7=Seven, 9=Nine}

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



My Personal Notes arrow_drop_up

The function of education is to teach one to think intensively and to think critically

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.