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Java Articles
Page 47 of 450
CharBuffer slice() method in Java
A new CharBuffer with the content as a shared subsequence of the original CharBuffer can be created using the method slice() in the class java.nio.CharBuffer. This method returns the new CharBuffer that is read-only if the original buffer is read-only and direct if the original buffer is direct.A program that demonstrates this is given as follows −Exampleimport java.nio.*; import java.util.*; public class Demo { public static void main(String[] args) { int n = 5; try { CharBuffer buffer1 = CharBuffer.allocate(n); buffer1.put('A'); ...
Read MoreSecureRandom getInstance() method in Java
A SecureRandom object can be obtained using the getInstance() method in class java.security.SecureRandom. This SecureRandom object is useful in implementing the Random Number Generator (RNG) algorithm that is specified.The getInstance() method requires a single parameter i.e. the Random Number Generator (RNG) algorithm and it returns the SecureRandom object.A program that demonstrates this is given as follows −Exampleimport java.security.*; import java.util.*; public class Demo { public static void main(String[] argv) { try { SecureRandom sRandom = SecureRandom.getInstance("SHA1PRNG"); String s = "Apple"; byte[] arrB = s.getBytes(); ...
Read MoreSecureRandom generateSeed() method in Java
The number of seed bytes can be obtained using the method generateSeed() in class java.security.SecureRandom. This method requires a single parameter i.e. the number of seed bytes and it returns the seed bytes that are generated.A program that demonstrates this is given as follows −Exampleimport java.security.*; import java.util.*; public class Demo { public static void main(String[] argv) { try { SecureRandom sRandom = SecureRandom.getInstance("SHA1PRNG"); byte[] arrB = sRandom.generateSeed(5); System.out.println("The seed bytes generated are: " + Arrays.toString(arrB)); } catch (NoSuchAlgorithmException e) { ...
Read MoreSecureRandom getAlgorithm() method in Java
The name of the algorithm for the SecureRandom object can be obtained using the method getAlgorithm() in the class java.security.SecureRandom. This method requires no parameters and it returns the name of the algorithm for the SecureRandom object.A program that demonstrates this is given as follows −Exampleimport java.security.*; import java.util.*; public class Demo { public static void main(String[] argv) { try { SecureRandom sRandom = SecureRandom.getInstance("SHA1PRNG"); String algorithmName = sRandom.getAlgorithm(); System.out.println("The Algorithm is: " + algorithmName); } catch (NoSuchAlgorithmException e) { ...
Read MoreSecureRandom getProvider() method in Java
The provider for the SecureRandom object can be obtained using the method getProvider() in the class java.security.SecureRandom. This method requires no parameters and it returns the provider for the SecureRandom object.A program that demonstrates this is given as follows −Exampleimport java.security.*; import java.util.*; public class Demo { public static void main(String[] argv) { try { SecureRandom sRandom = SecureRandom.getInstance("SHA1PRNG"); Provider provider = sRandom.getProvider(); System.out.println("The Provider is: " + provider.getName()); } catch (NoSuchAlgorithmException e) { ...
Read MoreSecureRandom setSeed() method in Java
The random object can be reseeded using the setSeed() method in the class java.security.SecureRandom. This method requires a single parameter i.e. the required seed byte array and it returns the reseeded random object.A program that demonstrates this is given as follows −Exampleimport java.security.*; import java.util.*; public class Demo { public static void main(String[] argv) { try { SecureRandom sRandom = SecureRandom.getInstance("SHA1PRNG"); String str = "Apple"; byte[] arrB = str.getBytes(); sRandom.setSeed(arrB); byte[] arrSeed = sRandom.getSeed(5); ...
Read MoreSecureRandom nextBytes() method in Java
The number of random bytes as specified by the user can be obtained using the nextBytes() method in the class java.security.SecureRandom. This method requires a single parameter i.e. a random byte array and it returns the random bytes as specified by the user.A program that demonstrates this is given as follows −Exampleimport java.security.*; import java.util.*; public class Demo { public static void main(String[] argv) { try { SecureRandom sRandom = SecureRandom.getInstance("SHA1PRNG"); String s = "Apple"; byte[] arrB = s.getBytes(); System.out.println("The ...
Read MoreKeyPairGenerator getProvider() method in Java
The provider of the key pair object can be obtained using the getProvider() method in the class java.security.KeyPairGenerator. This method requires no parameters and it returns the provider of the key pair object.A program that demonstrates this is given as follows −Exampleimport java.security.*; import java.util.*; public class Demo { public static void main(String[] argv) { try { KeyPairGenerator kpGenerator = KeyPairGenerator.getInstance("DSA"); Provider p = kpGenerator.getProvider(); System.out.println("The Provider is: " + p.getName()); } catch (NoSuchAlgorithmException e) { ...
Read MoreKeyPairGenerator getAlgorithm() method in Java
The algorithm name for the key pair generator can be obtained using the method getAlgorithm() in the class java.security.KeyPairGenerator. This method requires no parameters and it returns the algorithm name for the key pair generator.A program that demonstrates this is given as follows −Exampleimport java.security.*; import java.util.*; public class Demo { public static void main(String[] argv) { try { KeyPairGenerator kpGenerator = KeyPairGenerator.getInstance("DSA"); String algorithm = kpGenerator.getAlgorithm(); System.out.println("The Algorithm is: " + algorithm); } catch (NoSuchAlgorithmException e) { ...
Read MoreAlgorithmParameterGenerator getProvider() method in Java
The provider of the generator object can be obtained using the method getProvider() in the class java.security.AlgorithmParameterGenerator. This method requires no parameters and it returns the provider of the generator object.A program that demonstrates this is given as follows −Exampleimport java.security.*; import java.util.*; public class Demo { public static void main(String[] argv) { try { AlgorithmParameterGenerator apGenerator = AlgorithmParameterGenerator.getInstance("DiffieHellman"); apGenerator.init(1024); Provider provider = apGenerator.getProvider(); System.out.println("The Provider is: " + provider); } catch (NoSuchAlgorithmException e) { ...
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