Provider.Service toString() method in Java with Examples

The toString() method of java.security.Provider.Service class returns a string representation of this provider service. 

Syntax:

public String toString()

Return Value: This method provides string representation of this provider service. 

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

Example 1:

Java

// Java program to demonstrate
// toString() 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 string representation
            // of Provider.Service object
            // by using toString() method
            String value = service.toString();

            // display the result
            System.out.println("String representation : "
                               + value);
        }

        catch (NoSuchAlgorithmException e) {
            System.out.println("Exception thrown : " + e);
        }
        catch (NoSuchProviderException e) {
            System.out.println("Exception thrown : " + e);
        }
    }
}

Output:

String representation : SUN: Signature.SHA1withDSA -> sun.security.provider.DSA$SHA1withDSA aliases: [DSA, DSS, SHA/DSA, SHA-1/DSA, SHA1/DSA, SHAwithDSA, DSAWithSHA1, OID.1.2.840.10040.4.3, 1.2.840.10040.4.3, 1.3.14.3.2.13, 1.3.14.3.2.27] attributes: {ImplementedIn=Software, KeySize=1024, SupportedKeyClasses=java.security.interfaces.DSAPublicKey|java.security.interfaces.DSAPrivateKey}

Example 2:

Java

// Java program to demonstrate
// toString() 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 a string representation
            // of Provider.Service object
            // by using toString() method
            String value = service.toString();

            // display the result
            System.out.println("String representation : "
                               + value);
        }

        catch (NoSuchAlgorithmException e) {
            System.out.println("Exception thrown : " + e);
        }
    }
}

Output:

String representation : SUN: MessageDigest.MD5 -> sun.security.provider.MD5 attributes: {ImplementedIn=Software}

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