Provider keySet() method in Java with Examples
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:
import java.security.*;
import java.util.*;
public class GFG1 {
public static void main(String[] argv)
{
int i = 10 ;
try {
SecureRandom sr = SecureRandom.getInstance( "SHA1PRNG" );
Provider provider = sr.getProvider();
Set<Object> keyset;
keyset = provider.keySet();
Iterator iter = keyset.iterator();
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:
import java.security.*;
import java.util.*;
public class GFG1 {
public static void main(String[] argv)
{
int i = 10 ;
try {
Signature sr = Signature.getInstance( "SHA1withDSA" );
Provider provider = sr.getProvider();
Set<Object> keyset;
keyset = provider.keySet();
Iterator iter = keyset.iterator();
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
Last Updated :
06 Dec, 2018
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