Question

How to get key from HashMap using value in Java

Answer 1

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

public class MyClass {
    public static void main(String args[]) {
        HashMap<String, String> hm = new HashMap<>();
 
        hm.put("Java", "ABC");
        hm.put("C++", "AAB");
        hm.put("Python", "BBB");
        hm.put("C", "AAA");
        hm.put("PHP", "ACD");
 
        String value = "BBB";

        for (Entry<String, String> entry: hm.entrySet()) {
            if (entry.getValue() == value) {
                System.out.println(entry.getKey());
                break;
            }
        }
    }
}
  
  
  
  
/*
run:
    
Python
  
*/

 

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