This java.security.spec.KeySpec is a transparent representation of a Diffie-Hellman public key.

Figure 17-20. javax.crypto.spec.DHPublicKeySpec

public class DHPublicKeySpec implements java.security.spec.KeySpec {
// Public Constructors
     public DHPublicKeySpec(java.math.BigInteger y, java.math.BigInteger p, 
        java.math.BigInteger g);  
// Public Instance Methods
     public java.math.BigInteger getG( );  
     public java.math.BigInteger getP( );  
     public java.math.BigInteger getY( );  
}