public class

AlgorithmParameters

extends Object
java.lang.Object
   ↳ java.security.AlgorithmParameters

Class Overview

AlgorithmParameters is an engine class which provides algorithm parameters.

Summary

Protected Constructors
AlgorithmParameters(AlgorithmParametersSpi algPramSpi, Provider provider, String algorithm)
Constructs a new instance of AlgorithmParameters with the given arguments.
Public Methods
final String getAlgorithm()
Returns the name of the algorithm.
final byte[] getEncoded()
Returns this AlgorithmParameters in their default encoding format.
final byte[] getEncoded(String format)
Returns this AlgorithmParameters in the specified encoding format.
static AlgorithmParameters getInstance(String algorithm, String provider)
Returns a new instance of AlgorithmParameters from the specified provider for the specified algorithm.
static AlgorithmParameters getInstance(String algorithm, Provider provider)
Returns a new instance of AlgorithmParameters from the specified provider for the specified algorithm.
static AlgorithmParameters getInstance(String algorithm)
Returns a new instance of AlgorithmParameters for the specified algorithm.
final <T extends AlgorithmParameterSpec> T getParameterSpec(Class<T> paramSpec)
Returns the AlgorithmParameterSpec for this AlgorithmParameters.
final Provider getProvider()
Returns the provider associated with this AlgorithmParameters.
final void init(byte[] params)
Initializes this AlgorithmParameters with the specified byte[] using the default decoding format for parameters.
final void init(AlgorithmParameterSpec paramSpec)
Initializes this AlgorithmParameters with the specified AlgorithmParameterSpec.
final void init(byte[] params, String format)
Initializes this AlgorithmParameters with the specified byte[] using the specified decoding format.
final String toString()
Returns a string containing a concise, human-readable description of this AlgorithmParameters.
[Expand]
Inherited Methods
From class java.lang.Object

Protected Constructors

protected AlgorithmParameters (AlgorithmParametersSpi algPramSpi, Provider provider, String algorithm)

Since: API Level 1

Constructs a new instance of AlgorithmParameters with the given arguments.

Parameters
algPramSpi the concrete implementation.
provider the security provider.
algorithm the name of the algorithm.

Public Methods

public final String getAlgorithm ()

Since: API Level 1

Returns the name of the algorithm.

Returns
  • the name of the algorithm.

public final byte[] getEncoded ()

Since: API Level 1

Returns this AlgorithmParameters in their default encoding format. The default encoding format is ASN.1.

Returns
  • the encoded parameters.
Throws
IOException if this AlgorithmParameters has already been initialized, or if this parameters could not be encoded.

public final byte[] getEncoded (String format)

Since: API Level 1

Returns this AlgorithmParameters in the specified encoding format.

Parameters
format the name of the encoding format.
Returns
  • the encoded parameters.
Throws
IOException if this AlgorithmParameters has already been initialized, or if this parameters could not be encoded.

public static AlgorithmParameters getInstance (String algorithm, String provider)

Since: API Level 1

Returns a new instance of AlgorithmParameters from the specified provider for the specified algorithm.

Parameters
algorithm the name of the algorithm to use.
provider name of the provider of the AlgorithmParameters.
Returns
  • a new instance of AlgorithmParameters for the specified algorithm.
Throws
NoSuchAlgorithmException if the specified algorithm is not available.
NoSuchProviderException if the specified provider is not available.
IllegalArgumentException if provider is null or of length zero.
NullPointerException if algorithm is null.

public static AlgorithmParameters getInstance (String algorithm, Provider provider)

Since: API Level 1

Returns a new instance of AlgorithmParameters from the specified provider for the specified algorithm.

Parameters
algorithm the name of the algorithm to use.
provider the provider of the AlgorithmParameters.
Returns
  • a new instance of AlgorithmParameters for the specified algorithm.
Throws
NoSuchAlgorithmException if the specified algorithm is not available.
NullPointerException if algorithm is null.
IllegalArgumentException if provider is null.

public static AlgorithmParameters getInstance (String algorithm)

Since: API Level 1

Returns a new instance of AlgorithmParameters for the specified algorithm.

Parameters
algorithm the name of the algorithm to use.
Returns
  • a new instance of AlgorithmParameters for the specified algorithm.
Throws
NoSuchAlgorithmException if the specified algorithm is not available.
NullPointerException if algorithm is null.

public final T getParameterSpec (Class<T> paramSpec)

Since: API Level

Returns the AlgorithmParameterSpec for this AlgorithmParameters.

Parameters
paramSpec the type of the parameter specification in which this parameters should be converted.
Returns
  • the AlgorithmParameterSpec for this AlgorithmParameters.
Throws
InvalidParameterSpecException if this AlgorithmParameters has already been initialized, or if this parameters could not be converted to the specified class.

public final Provider getProvider ()

Since: API Level 1

Returns the provider associated with this AlgorithmParameters.

Returns
  • the provider associated with this AlgorithmParameters.

public final void init (byte[] params)

Since: API Level 1

Initializes this AlgorithmParameters with the specified byte[] using the default decoding format for parameters. The default encoding format is ASN.1.

Parameters
params the encoded parameters.
Throws
IOException if this AlgorithmParameters has already been initialized, or the parameter could not be encoded.

public final void init (AlgorithmParameterSpec paramSpec)

Since: API Level 1

Initializes this AlgorithmParameters with the specified AlgorithmParameterSpec.

Parameters
paramSpec the parameter specification.
Throws
InvalidParameterSpecException if this AlgorithmParameters has already been initialized or the given paramSpec is not appropriate for initializing this AlgorithmParameters.

public final void init (byte[] params, String format)

Since: API Level 1

Initializes this AlgorithmParameters with the specified byte[] using the specified decoding format.

Parameters
params the encoded parameters.
format the name of the decoding format.
Throws
IOException if this AlgorithmParameters has already been initialized, or the parameter could not be encoded.

public final String toString ()

Since: API Level 1

Returns a string containing a concise, human-readable description of this AlgorithmParameters.

Returns
  • a printable representation for this AlgorithmParameters.