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
import java.util.*;
public class GfG {
public static void main(String[] args)
{
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
import java.util.*;
public class GfG {
public static void main(String[] args)
{
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)
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