Provider entrySet() method in Java with Examples

The entrySet() method of java.security.Provider class is used to return an unmodifiable Set view of the property entries contained in this Provider.

Syntax:

public Set<Map.Entry> entrySet()

Return Value: This method returns a set view of the mappings contained in this map

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

Example 1:

// Java program to demonstrate
// entrySet() 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<Map.Entry<Object, Object> > set;

            // getting unmodifiable Set view of the property entries
            set = provider.entrySet();

            // Creating the object of iterator to iterate set
            Iterator iter = set.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=SHA1withDSA
Value is : Alg.Alias.Signature.1.2.840.10040.4.3=SHA1withDSA
Value is : Alg.Alias.Signature.DSS=SHA1withDSA
Value is : SecureRandom.SHA1PRNG ImplementedIn=Software
Value is : KeyStore.JKS=sun.security.provider.JavaKeyStore$DualFormatJKS
Value is : Alg.Alias.MessageDigest.SHA-1=SHA
Value is : MessageDigest.SHA=sun.security.provider.SHA
Value is : KeyStore.CaseExactJKS=sun.security.provider.JavaKeyStore$CaseExactJKS
Value is : CertStore.com.sun.security.IndexedCollection ImplementedIn=Software
Value is : Signature.SHA256withDSA=sun.security.provider.DSA$SHA256withDSA

Example 2:

// Java program to demonstrate
// entrySet() method

import java.security.*;
import java.util.*;

public class GFG1 {
    public static void main(String[] argv) throws Exception
    {
        // Declaring int value i
        int i = 10;

        try {
            // creating the object of  KeyPairGenerator
            KeyPairGenerator sr = KeyPairGenerator.getInstance("DSA", "SUN");

            // getting the Provider of the KeyPairGenerator sr
            // by using method getProvider()
            Provider provider = sr.getProvider();

            // Declaring the variable of set<Map> type
            Set<Map.Entry<Object, Object> > set;

            // getting unmodifiable Set view of the property entries
            set = provider.entrySet();

            // Creating the object of iterator to iterate set
            Iterator iter = set.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=SHA1withDSA
Value is : Alg.Alias.Signature.1.2.840.10040.4.3=SHA1withDSA
Value is : Alg.Alias.Signature.DSS=SHA1withDSA
Value is : SecureRandom.SHA1PRNG ImplementedIn=Software
Value is : KeyStore.JKS=sun.security.provider.JavaKeyStore$DualFormatJKS
Value is : Alg.Alias.MessageDigest.SHA-1=SHA
Value is : MessageDigest.SHA=sun.security.provider.SHA
Value is : KeyStore.CaseExactJKS=sun.security.provider.JavaKeyStore$CaseExactJKS
Value is : CertStore.com.sun.security.IndexedCollection ImplementedIn=Software
Value is : Signature.SHA256withDSA=sun.security.provider.DSA$SHA256withDSA