Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
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}
Updated on: 30-Jul-2019
205 Views
Advertisements