Provider toString() method in Java

The name and the version number of the provider in string form can be obtained using the method toString() in the class java.security.Provider. This method requires no parameters and it returns the name as well as the version number of the provider in string form.

A program that demonstrates this is given as follows −

Example

 Live Demo

import java.security.*;
import java.util.*;
public class Demo {
   public static void main(String[] argv) {
      try {
         KeyPairGenerator kpGenerator = KeyPairGenerator.getInstance("DSA");
         Provider p = kpGenerator.getProvider();
         System.out.println("The name and version number of the provider is: " + p.toString());
      } catch (NoSuchAlgorithmException e) {
         System.out.println("Error!!! NoSuchAlgorithmException");
      }
   }
}

Output

The name and version number of the provider is: SUN version 1.8

Now let us understand the above program.

The toString() method is used to obtain the name and the version number of the provider in string form. Then this is displayed. If the algorithm name is wrong, then the exception NoSuchAlgorithmException is thrown. A code snippet that demonstrates is given as follows −

try {
   KeyPairGenerator kpGenerator = KeyPairGenerator.getInstance("DSA");
   Provider p = kpGenerator.getProvider();
   System.out.println("The name and version number of the provider is: " + p.toString());
} catch (NoSuchAlgorithmException e) {
   System.out.println("Error!!! NoSuchAlgorithmException");
}