Question

How to generate an MD5 hash in Java

Answer 1

import java.security.MessageDigest;

public class MyClass {

    public static void main(String args[]) throws Exception {
        String str = "java programming";

        MessageDigest md5 = MessageDigest.getInstance("MD5");

        byte[] hash = md5.digest(str.getBytes());

        for (byte b : hash) {
            System.out.printf("%02x", b);
        }
    }
}
  
  
  
  
/*
run:
   
5c7f873315e16a979d64624fcd19231b
   
*/

 

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Answer 2

import java.security.MessageDigest;
 
public class MyClass {
    public static byte[] generateMD5(String str) throws Exception {
        MessageDigest md5 = MessageDigest.getInstance("MD5");

        byte[] hash = md5.digest(str.getBytes());
        
        return hash;
        
    }
    
    public static void main(String args[]) throws Exception {
        String str = "java programming";

        byte[] hash = generateMD5(str);
 
        for (byte b : hash) {
            System.out.printf("%02x", b);
        }
    }
}
   
   
   
   
/*
run:
    
5c7f873315e16a979d64624fcd19231b
    
*/

 

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