https://openjdk.java.net/ 
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package java.security.interfaces;

import java.security.spec.NamedParameterSpec;


An interface for an elliptic curve public/private key as defined by
RFC 8032: Edwards-Curve
Digital Signature Algorithm (EdDSA). These keys are distinct from the keys represented by ECKey, and they are intended for use with algorithms based on RFC 8032 such as the EdDSA Signature algorithm. This interface allows access to the algorithm parameters associated with the key. 
Since:15
/**
 * An interface for an elliptic curve public/private key as defined by
 * <a href="https://tools.ietf.org/html/rfc8032">RFC 8032: Edwards-Curve
 * Digital Signature Algorithm (EdDSA)</a>. These keys are distinct from the
 * keys represented by {@code ECKey}, and they are intended for use with
 * algorithms based on RFC 8032 such as the EdDSA {@code Signature} algorithm.
 * This interface allows access to the algorithm parameters associated with
 * the key.
 *
 * @since 15
 */
public interface EdECKey {
    
Returns the algorithm parameters associated with the key.

Returns:the associated algorithm parameters.
/**
     * Returns the algorithm parameters associated with the key.
     *
     * @return the associated algorithm parameters.
     */
    NamedParameterSpec getParams();
}