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 interfaceimport 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 interfaceimport 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)
