The keySet() method of java.security.Provider class is used to return an unmodifiable Set view of the property keys contained in this provider.
Syntax:
public Set keySet()
Return Value: This method returns a set view of the keys contained in this map.
Below are the examples to illustrate the keySet() method:
Program 1:
// Java program to demonstrate// keySet() method import java.security.*;import java.util.*; public class GFG1 { public static void main(String[] argv) { // Declaring int value i int i = 10; try { // creating the object of SecureRandom SecureRandom sr = SecureRandom.getInstance("SHA1PRNG"); // getting the Provider of the SecureRandom sr // by using method getProvider() Provider provider = sr.getProvider(); // Declaring the variable of set<Map> type Set<Object> keyset; // getting unmodifiable Set view of the keyset keyset = provider.keySet(); // Creating the object of iterator to iterate set Iterator iter = keyset.iterator(); // printing the set elements System.out.println("unmodifiable Set view : \n "); while (i > 0) { System.out.println("Value is : " + iter.next()); i--; } } catch (NoSuchAlgorithmException e) { System.out.println("Exception thrown : " + e); } }} |
Output:
unmodifiable Set view : Value is : Alg.Alias.Signature.SHA1/DSA Value is : Alg.Alias.Signature.1.2.840.10040.4.3 Value is : Alg.Alias.Signature.DSS Value is : SecureRandom.SHA1PRNG ImplementedIn Value is : KeyStore.JKS Value is : Alg.Alias.MessageDigest.SHA-1 Value is : MessageDigest.SHA Value is : KeyStore.CaseExactJKS Value is : CertStore.com.sun.security.IndexedCollection ImplementedIn Value is : Signature.SHA256withDSA
Program 2:
// Java program to demonstrate// keySet() method import java.security.*;import java.util.*; public class GFG1 { public static void main(String[] argv) { // Declaring int value i int i = 10; try { // creating the object of Signature Signature sr = Signature.getInstance("SHA1withDSA"); // getting the Provider of the Signature sr // by using method getProvider() Provider provider = sr.getProvider(); // Declaring the variable of set<Map> type Set<Object> keyset; // getting unmodifiable Set view of the keyset keyset = provider.keySet(); // Creating the object of iterator to iterate set Iterator iter = keyset.iterator(); // printing the set elements System.out.println("unmodifiable Set view : \n "); while (i > 0) { System.out.println("Value is : " + iter.next()); i--; } } catch (NoSuchAlgorithmException e) { System.out.println("Exception thrown : " + e); } }} |
Output:
unmodifiable Set view : Value is : Alg.Alias.Signature.SHA1/DSA Value is : Alg.Alias.Signature.1.2.840.10040.4.3 Value is : Alg.Alias.Signature.DSS Value is : SecureRandom.SHA1PRNG ImplementedIn Value is : KeyStore.JKS Value is : Alg.Alias.MessageDigest.SHA-1 Value is : MessageDigest.SHA Value is : KeyStore.CaseExactJKS Value is : CertStore.com.sun.security.IndexedCollection ImplementedIn Value is : Signature.SHA256withDSA
