The getAttribute() method of java.security.Provider.Service class is used to return the value of attribute for the particular attribute name passed in this method.
Syntax:
public final String getAttribute(String name)
Return Value: This method returns value for the particular attribute type. Below are the examples to illustrate the getAttribute() method: Example 1:
Java
// Java program to demonstrate // getAttribute() 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 attribute of Provider.Service object
// by using getAttribute() method
String algo = service.getAttribute("KeySize");
// display the result
System.out.println("KeySize is : " + algo);
}
catch (NoSuchAlgorithmException e) {
System.out.println("Exception thrown : " + e);
}
catch (NoSuchProviderException e) {
System.out.println("Exception thrown : " + e);
}
}
} |
Output:
KeySize is : 1024
Example 2:
Java
// Java program to demonstrate // getAttribute() 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 attribute of Provider.Service object
// by using getAttribute() method
String algo
= service.getAttribute("ImplementedIn");
// display the result
System.out.println("ImplementedIn : "
+ algo);
}
catch (NoSuchAlgorithmException e) {
System.out.println("Exception thrown : "
+ e);
}
}
} |
Output:
ImplementedIn : Software