## Uses of Interface
java.security.PrivateKey

Packages that use PrivateKey
java.security: Provides the classes and interfaces for the security framework.
java.security.interfaces: Provides interfaces for generating RSA (Rivest, Shamir and Adleman AsymmetricCipher algorithm) keys as defined in the RSA Laboratory Technical Note PKCS#1, and DSA (Digital Signature Algorithm) keys as defined in NIST's FIPS-186.
javax.crypto.interfaces: Provides interfaces for Diffie-Hellman keys as defined in RSA Laboratories' PKCS #3.
javax.net.ssl: Provides classes for the secure socket package.
javax.security.auth.x500: This package contains the classes that should be used to store X500 Principal and X500 Private Credentials in a Subject.
jdk.security.jarsigner: This package defines APIs for signing jar files.

### Uses of PrivateKey in java.security

Methods in java.security that return PrivateKey
`protected abstract PrivateKey` KeyFactorySpi.`engineGeneratePrivate​(KeySpec keySpec)` Generates a private key object from the provided key specification (key material).
`PrivateKey` KeyFactory.`generatePrivate​(KeySpec keySpec)` Generates a private key object from the provided key specification (key material).
`PrivateKey` KeyPair.`getPrivate()` Returns a reference to the private key component of this key pair.
`PrivateKey` KeyStore.PrivateKeyEntry.`getPrivateKey()` Gets the `PrivateKey` from this entry.
`PrivateKey` Signer.`getPrivateKey()` Deprecated, for removal: This API element is subject to removal in a future version. Returns this signer's private key.

Methods in java.security with parameters of type PrivateKey
`protected abstract void` SignatureSpi.`engineInitSign​(PrivateKey privateKey)` Initializes this signature object with the specified private key for signing operations.
`protected void` SignatureSpi.`engineInitSign​(PrivateKey privateKey, SecureRandom random)` Initializes this signature object with the specified private key and source of randomness for signing operations.
`void` Signature.`initSign​(PrivateKey privateKey)` Initialize this object for signing.
`void` Signature.`initSign​(PrivateKey privateKey, SecureRandom random)` Initialize this object for signing.

Constructors in java.security with parameters of type PrivateKey
`KeyPair​(PublicKey publicKey, PrivateKey privateKey)` Constructs a key pair from the given public key and private key.
`PrivateKeyEntry​(PrivateKey privateKey, Certificate[] chain)` Constructs a `PrivateKeyEntry` with a `PrivateKey` and corresponding certificate chain.
`PrivateKeyEntry​(PrivateKey privateKey, Certificate[] chain, Set<KeyStore.Entry.Attribute> attributes)` Constructs a `PrivateKeyEntry` with a `PrivateKey` and corresponding certificate chain and associated entry attributes.
`SignedObject​(Serializable object, PrivateKey signingKey, Signature signingEngine)` Constructs a SignedObject from any Serializable object.

### Uses of PrivateKey in java.security.interfaces

Subinterfaces of PrivateKey in java.security.interfaces
`interface` `DSAPrivateKey` The standard interface to a DSA private key.
`interface` `ECPrivateKey` The interface to an elliptic curve (EC) private key.
`interface` `RSAMultiPrimePrivateCrtKey` The interface to an RSA multi-prime private key, as defined in the PKCS#1 v2.2 standard, using the Chinese Remainder Theorem (CRT) information values.
`interface` `RSAPrivateCrtKey` The interface to an RSA private key, as defined in the PKCS#1 v2.2 standard, using the Chinese Remainder Theorem (CRT) information values.
`interface` `RSAPrivateKey` The interface to an RSA private key.
`interface` `XECPrivateKey` An interface for an elliptic curve private key as defined by RFC 7748.

### Uses of PrivateKey in javax.crypto.interfaces

Subinterfaces of PrivateKey in javax.crypto.interfaces
`interface` `DHPrivateKey` The interface to a Diffie-Hellman private key.

### Uses of PrivateKey in javax.net.ssl

Methods in javax.net.ssl that return PrivateKey
`PrivateKey` X509KeyManager.`getPrivateKey​(String alias)` Returns the key associated with the given alias.

### Uses of PrivateKey in javax.security.auth.x500

Methods in javax.security.auth.x500 that return PrivateKey
`PrivateKey` X500PrivateCredential.`getPrivateKey()` Returns the PrivateKey.

Constructors in javax.security.auth.x500 with parameters of type PrivateKey
`X500PrivateCredential​(X509Certificate cert, PrivateKey key)` Creates an X500PrivateCredential that associates an X.509 certificate, a private key and the KeyStore alias.
`X500PrivateCredential​(X509Certificate cert, PrivateKey key, String alias)` Creates an X500PrivateCredential that associates an X.509 certificate, a private key and the KeyStore alias.

### Uses of PrivateKey in jdk.security.jarsigner

Methods in jdk.security.jarsigner with parameters of type PrivateKey
`static String` JarSigner.Builder.`getDefaultSignatureAlgorithm​(PrivateKey key)` Gets the default signature algorithm for a private key.

Constructors in jdk.security.jarsigner with parameters of type PrivateKey
`Builder​(PrivateKey privateKey, CertPath certPath)` Creates a `JarSigner.Builder` object with a private key and a certification path.