Encrypt password in java

This is one of the method for encrypt the password using MD5 and using this method you can encrypt but you can not decrypt the password .

 import java.security.MessageDigest;  
 public class PasswordEncryptDemo {  
      public static String Password(String plainText) throws Exception  
      {  
           MessageDigest mdAlgorithm = MessageDigest.getInstance("MD5");  
           mdAlgorithm.update(plainText.getBytes());  
           byte[] digest = mdAlgorithm.digest();  
           StringBuffer hexString = new StringBuffer();  
           for (int i = 0; i < digest.length; i++)  
           {  
             plainText = Integer.toHexString(0xFF & digest[i]);  
             if (plainText.length() < 2)   
             {  
               plainText = "0" + plainText;  
             }  
             hexString.append(plainText);  
           }  
           return hexString.toString();  
      }  
      public static void main(String args[])throws Exception  
      {  
           String planinText="poolof123";  
           System.out.println("The plain text is:"+planinText);  
           System.out.println("The encrypted text is:"+PasswordEncryptDemo.Password(planinText));  
      }  
 }  

output:

 The plain text is:poolof123  
 The encrypted text is:15e3c36a6a68803819c5d25a053b5535