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

import java.util.*;


This class is a simple holder for a key pair (a public key and a
private key). It does not enforce any security, and, when initialized,
should be treated like a PrivateKey.

Author:Benjamin Renaud
See Also:
Since:1.1
/**
 * This class is a simple holder for a key pair (a public key and a
 * private key). It does not enforce any security, and, when initialized,
 * should be treated like a PrivateKey.
 *
 * @see PublicKey
 * @see PrivateKey
 *
 * @author Benjamin Renaud
 * @since 1.1
 */

public final class KeyPair implements java.io.Serializable {

    private static final long serialVersionUID = -7565189502268009837L;

    private PrivateKey privateKey;
    private PublicKey publicKey;

    
Constructs a key pair from the given public key and private key.

Note that this constructor only stores references to the public and private key components in the generated key pair. This is safe, because Key objects are immutable. 
Params:
  • publicKey – the public key.
  • privateKey – the private key.
/**
     * Constructs a key pair from the given public key and private key.
     *
     * <p>Note that this constructor only stores references to the public
     * and private key components in the generated key pair. This is safe,
     * because {@code Key} objects are immutable.
     *
     * @param publicKey the public key.
     *
     * @param privateKey the private key.
     */
    public KeyPair(PublicKey publicKey, PrivateKey privateKey) {
        this.publicKey = publicKey;
        this.privateKey = privateKey;
    }

    
Returns a reference to the public key component of this key pair.

Returns:a reference to the public key.
/**
     * Returns a reference to the public key component of this key pair.
     *
     * @return a reference to the public key.
     */
    public PublicKey getPublic() {
        return publicKey;
    }

     
Returns a reference to the private key component of this key pair.

Returns:a reference to the private key.
/**
     * Returns a reference to the private key component of this key pair.
     *
     * @return a reference to the private key.
     */
   public PrivateKey getPrivate() {
        return privateKey;
    }
}