This abstract class defines the service-provider interface for KeyGenerator. A cryptographic provider must implement a concrete subclass of this class for each key-generation algorithm it supports. Applications never need to use or subclass this class.

public abstract class KeyGeneratorSpi {
// Public Constructors
     public KeyGeneratorSpi( );  
// Protected Instance Methods
     protected abstract SecretKey engineGenerateKey( );  
     protected abstract void engineInit(java.security.SecureRandom random);  
     protected abstract void engineInit(int keysize, java.security.SecureRandom random);  
     protected abstract void engineInit(java.security.spec.AlgorithmParameterSpec params,
        java.security.SecureRandom random) 
        throws java.security.InvalidAlgorithmParameterException;  
}

Passed To

KeyGenerator.KeyGenerator( )