Skip to content
Related Articles

Related Articles

SortedMap putAll() method in Java with Examples
  • Last Updated : 25 Jan, 2021

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:  

Java




// 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);
    }
}


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 putAll(). 

Java




// 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);
    }
}


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)
 

Attention reader! Don’t stop learning now. Get hold of all the important Java Foundation and Collections concepts with the Fundamentals of Java and Java Collections Course at a student-friendly price and become industry ready.

My Personal Notes arrow_drop_up
Recommended Articles
Page :