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Java Program to replace key and value in HashMap with identical key and different values
Create a HashMap and set key-value pair −
Map<Integer, String>map = new HashMap<>(); map.put(10, "A"); map.put(20, "B"); map.put(30, "C"); map.put(40, "D"); map.put(50, "E"); map.put(60, "F"); map.put(70, "G"); map.put(80, "H");
Now, let’s say you need to set a different value for an identical key. For that, use put() −
map.put(30, "T");
Example
import java.util.HashMap; import java.util.Map; public class Demo { public static void main(String args[]) { Map<Integer, String>map = new HashMap<>(); map.put(10, "A"); map.put(20, "B"); map.put(30, "C"); map.put(40, "D"); map.put(50, "E"); map.put(60, "F"); map.put(70, "G"); map.put(80, "H"); System.out.println("Map = \t" + map); map.put(30, "T"); System.out.println("Updated Map = \t" + map); } }
Output
Map = {80=H, 50=E, 20=B, 70=G, 40=D, 10=A, 60=F, 30=C} Updated Map = {80=H, 50=E, 20=B, 70=G, 40=D, 10=A, 60=F, 30=T}
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