Provider values() method in Java

The property values in the Provider can be viewed with an unmodifiable Collection view that is obtained using the method values() in the class java.security.Provider. This method requires no parameters and it returns an unmodifiable Collection view of the property values.

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) throws Exception {
      try {
         Signature sign = Signature.getInstance("DSA");
         Provider p = sign.getProvider();
         Collection<Object> val = p.values();
         Iterator i = val.iterator();
         System.out.println("The unmodifiable Collection view is: 
");
         int x = 30;
         while (x > 0) {
            System.out.println(i.next());
            x--;
         }
      } catch (NoSuchAlgorithmException e) {
         System.out.println("Error!!! NoSuchAlgorithmException");
      }
   }
}

Output

The unmodifiable Collection view is:
SHA1withDSA
SHA1withDSA
SHA1withDSA
Software
sun.security.provider.JavaKeyStore$DualFormatJKS
SHA
sun.security.provider.SHA
sun.security.provider.JavaKeyStore$CaseExactJKS
Software
sun.security.provider.DSA$SHA256withDSA
SHA
SHA1withDSA
Software
Software
Software
sun.security.provider.DSA$RawDSA
X.509
java.security.interfaces.DSAPublicKey|java.security.interfaces.DSAPrivateKey
sun.security.provider.certpath.IndexedCollectionCertStore
sun.security.provider.Sun
SHA
SHA1withDSA
sun.security.provider.DomainKeyStore$DKS
Software
SHA256withDSA
SHA224withDSA
1024
1024
Software
sun.security.provider.DSAKeyFactory