Map put() Method in Java with Examples
This method 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 and value where key is the left argument and value is the corresponding value of the key in the map.
Returns: This method returns returns previous value associated with the key if present, else return -1.
Below programs show the implementation of int put() method.
Program 1:
// Java code to show the implementation of // put method in Map interface import java.util.*; public class GfG { // Driver code public static void main(String[] args) { // Initializing a Map of type HashMap Map<Integer, String> map = new HashMap<>(); map.put(1, "One"); map.put(3, "Three"); map.put(5, "Five"); map.put(7, "Seven"); map.put(9, "Ninde"); System.out.println(map); } } |
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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 Map interface import java.util.*; public class GfG { // Driver code public static void main(String[] args) { // Initializing a Map of type HashMap Map<String, String> map = new HashMap<>(); map.put("1", "One"); map.put("3", "Three"); map.put("5", "Five"); map.put("7", "Seven"); map.put("9", "Ninde"); System.out.println(map); } } |
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Output:
{1=One, 3=Three, 5=Five, 7=Seven, 9=Ninde}
Reference:
Oracle Docs
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