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Provider keySet() method in Java
The property keys in the provider can be viewed using an unmodifiable Set view using the method keySet() in the class java.security.Provider. This method requires no parameters and it returns the unmodifiable Set view for the property keys as required.
A program that demonstrates this is given as follows −
Example
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(); Set<Object> set = p.keySet(); Iterator i= set.iterator(); System.out.println("The unmodifiable Set view is as follows:\n "); int x = 30; while (x > 0) { System.out.println(i.next()); x--; } } catch (NoSuchAlgorithmException e) { System.out.println("Error!!! NoSuchAlgorithmException"); } } }
Output
The unmodifiable Set view is as follows: Alg.Alias.Signature.SHA1/DSA Alg.Alias.Signature.1.2.840.10040.4.3 Alg.Alias.Signature.DSS SecureRandom.SHA1PRNG ImplementedIn KeyStore.JKS Alg.Alias.MessageDigest.SHA-1 MessageDigest.SHA KeyStore.CaseExactJKS CertStore.com.sun.security.IndexedCollection ImplementedIn Signature.SHA256withDSA Alg.Alias.MessageDigest.OID.1.3.14.3.2.26 Alg.Alias.Signature.DSA KeyFactory.DSA ImplementedIn KeyStore.JKS ImplementedIn AlgorithmParameters.DSA ImplementedIn Signature.NONEwithDSA Alg.Alias.CertificateFactory.X509 Signature.SHA256withDSA SupportedKeyClasses CertStore.com.sun.security.IndexedCollection Provider.id className Alg.Alias.MessageDigest.1.3.14.3.2.26 Alg.Alias.Signature.SHA-1/DSA KeyStore.DKS CertificateFactory.X.509 ImplementedIn Alg.Alias.Signature.OID.2.16.840.1.101.3.4.3.2 Alg.Alias.Signature.OID.2.16.840.1.101.3.4.3.1 Signature.SHA1withDSA KeySize Signature.NONEwithDSA KeySize CertPathValidator.PKIX ImplementedIn KeyFactory.DSA
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