Question

How to iterate over the key-value pairs in a HashMap use the forEach() with Java

Answer 1

import java.util.HashMap;

public class MyClass {
    public static void main(String args[]) {
        HashMap<String, Integer> hmp = new HashMap<String, Integer>();
    
        hmp.put("java", 4);
        hmp.put("c++", 2);
        hmp.put("c", 7);
        hmp.put("python", 5);
        hmp.put("rust", 6);
        hmp.put("c#", 1);
        hmp.put("php", 3);
            
        hmp.forEach((key, value) -> System.out.println(key + ": " + value));
  
    }
}
        
        
        
        
/*
run:
        
c#: 1
rust: 6
c++: 2
python: 5
java: 4
c: 7
php: 3
        
*/

 

70+ SQL courses for beginners and professionals