AlgorithmParameterGenerator getProvider() method in Java

The provider of the generator object can be obtained using the method getProvider() in the class java.security.AlgorithmParameterGenerator. This method requires no parameters and it returns the provider of the generator object.

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 {
         AlgorithmParameterGenerator apGenerator = AlgorithmParameterGenerator.getInstance("DiffieHellman");
         apGenerator.init(1024);
         Provider provider = apGenerator.getProvider();
         System.out.println("The Provider is: " + provider);
      } catch (NoSuchAlgorithmException e) {
         System.out.println("Error!!! NoSuchAlgorithmException");
      } catch (ProviderException e) {
         System.out.println("Error!!! ProviderException");
      }
   }
}

Output

The Provider is: SunJCE version 1.8

Now let us understand the above program.

The method getProvider() is used to obtain the provider of the generator object. Then this provider is displayed. If the algorithm name is wrong, then the exception NoSuchAlgorithmException is thrown. A code snippet that demonstrates is given as follows −

try {
   AlgorithmParameterGenerator apGenerator = AlgorithmParameterGenerator.getInstance("DiffieHellman");
   apGenerator.init(1024);
   Provider provider = apGenerator.getProvider();
   System.out.println("The Provider is: " + provider);
} catch (NoSuchAlgorithmException e) {
   System.out.println("Error!!! NoSuchAlgorithmException");
} catch (ProviderException e) {
   System.out.println("Error!!! ProviderException");
}