El método keys() de la clase java.security.Provider se usa para devolver una enumeración de las claves en esta tabla hash.
Sintaxis:
public Enumeration keys()
Valor devuelto: este método devuelve una enumeración de las claves en esta tabla hash.
A continuación se muestran los ejemplos para ilustrar el método keys() :
Programa 1:
Java
// Java program to demonstrate
// keys() method
import java.security.*;
import java.util.*;
public class GFG1 {
public static void main(String[] argv)
{
// Declaring int variable
int i = 10;
try {
// creating the object of SecureRandom
SecureRandom sr = SecureRandom.getInstance("NativePRNGBlocking");
// getting the Provider of the SecureRandom sr
// by using method getProvider()
Provider provider = sr.getProvider();
// Declaring the variable of Enumeration<Object> type
Enumeration<Object> enume;
// getting the enumeration of the keys
enume = provider.keys();
// printing the enumerated keys
System.out.println("enumeration of the values: \n");
while (i > 0) {
System.out.println("Value is: " + enume.nextElement());
i--;
}
}
catch (NoSuchAlgorithmException e) {
System.out.println("Exception thrown : " + e);
}
}
}
Producción:
enumeration of the values: 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
Ejemplo 2:
Java
// Java program to demonstrate
// keys() method
import java.security.*;
import java.util.*;
public class GFG1 {
public static void main(String[] argv)
{
// Declaring int variable
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 Enumeration<Object> type
Enumeration<Object> enume;
// getting the enumeration of the keys
enume = provider.keys();
// printing the enumerated keys
System.out.println("enumeration of the values: \n");
while (i > 0) {
System.out.println("Value is: " + enume.nextElement());
i--;
}
}
catch (NoSuchAlgorithmException e) {
System.out.println("Exception thrown : " + e);
}
}
}
Producción:
enumeration of the values: 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
Publicación traducida automáticamente
Artículo escrito por RohitPrasad3 y traducido por Barcelona Geeks. The original can be accessed here. Licence: CCBY-SA