Provider.Service getAlgorithm() method in Java with Examples

The getAlgorithm() method of java.security.Provider.Service class is used to return the standard name of the algorithm this Provider.Service is associated with.

Syntax:

public final String getAlgorithm()

Return Value: This method returns name of the algorithm.



Below are the examples to illustrate the getAlgorithm() method:

Example 1:

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// Java program to demonstrate
// getAlgorithm() method
  
import java.security.*;
import java.util.*;
  
public class GFG1 {
    public static void main(String[] argv)
    {
        try {
  
            // creating the object of Signature
            Signature sr
                = Signature.getInstance(
                    "SHA1withDSA",
                    "SUN");
  
            // getting the Provider of the Signature sr
            // by using method getProvider()
            Provider provider
                = sr.getProvider();
  
            // getting the service of the provider
            // using getServices() method
            Provider.Service service
                = provider
                      .getService("Signature",
                                  sr.getAlgorithm());
  
            // getting algoritm of Provider.Service object
            // by using getAlgorithm() method
            String algo = service.getAlgorithm();
  
            // display the result
            System.out.println("Algorithm : " + algo);
        }
  
        catch (NoSuchAlgorithmException e) {
            System.out.println("Exception thrown : " + e);
        }
        catch (NoSuchProviderException e) {
            System.out.println("Exception thrown : " + e);
        }
    }
}

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Output:

Algorithm : SHA1withDSA

Example 2:

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// Java program to demonstrate
// getAlgorithm() method
  
import java.security.*;
import java.util.*;
  
public class GFG1 {
    public static void main(String[] argv)
    {
        try {
  
            // creating object of MessageDigest
            MessageDigest msd
                = MessageDigest.getInstance("MD5");
  
            // getting the Provider of the Signature sr
            // by using method getProvider()
            Provider provider = msd.getProvider();
  
            // getting the service of the provider
            // using getServices() method
            Provider.Service service
                = provider
                      .getService("MessageDigest",
                                  msd.getAlgorithm());
  
            // getting algoritm of Provider.Service object
            // by using getAlgorithm() method
            String algo = service.getAlgorithm();
  
            // display the result
            System.out.println("Algorithm : " + algo);
        }
  
        catch (NoSuchAlgorithmException e) {
            System.out.println("Exception thrown : " + e);
        }
    }
}

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Output:

Algorithm : MD5

Reference: https://docs.oracle.com/javase/9/docs/api/java/security/Provider.Service.html#getAlgorithm–



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