Example to compute MD5 check sum for string (Password)

In general, most of the applications rely on passwords, the following example demonstrates , How Message digest help,s to generate MD5 checksum for the given

String

package com.onlinecodegeek.md5.ex;
import java.security.MessageDigest;

public class MD5HashingEx 
{
    public static void main(String[] args)throws Exception
    {
    	String password = "PASSWORD";
    	
        MessageDigest md = MessageDigest.getInstance("MD5");
        md.update(password.getBytes());
        
        byte byteData[] = md.digest();
 
        //convert the byte to hex format method 1
        StringBuffer sb = new StringBuffer();
        for (int i = 0; i < byteData.length; i++) {
         sb.append(Integer.toString((byteData[i] & 0xff) + 0x100, 16).substring(1));
        }
     
        System.out.println("Digest(in hex format):: " + sb.toString());
        
        //convert the byte to hex format method 2
        StringBuffer hexString = new StringBuffer();
    	for (int i=0;i<byteData.length;i++) {
    		String hex=Integer.toHexString(0xff & byteData[i]);
   	     	if(hex.length()==1) hexString.append('0');
   	     	hexString.append(hex);
    	}
    	System.out.println("Digest(in hex format):: " + hexString.toString());
    }
}

OUTPUT:

Digest(in hex format):: 319f4d26e3c536b5dd871bb2c52e3178 Digest(in hex format):: 319f4d26e3c536b5dd871bb2c52e3178

 

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