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:



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// 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);
        }
    }
}

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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:











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// 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); 


        } 


    } 


} 



















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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








    

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