The Map Interface in Java

Use the Map interface to store key-value pairs. It’s great for lookups by key.

Source Code

import java.util.HashMap;
import java.util.Map;

public class TestMap {
    public static void main(String[] args) {
        Map map = new HashMap();
        map.put("Alice", 30);
        map.put("Bob", 25);
        System.out.println(map.get("Alice")); // Access elements
    }
}