JDK 11 java.base.jmod is the JMOD file for JDK 11 Base module.

JDK 11 Base module compiled class files are stored in \fyicenter\jdk-11.0.1\jmods\java.base.jmod.

JDK 11 Base module compiled class files are also linked and stored in the \fyicenter\jdk-11.0.1\lib\modules JImage file.

JDK 11 Base module source code files are stored in \fyicenter\jdk-11.0.1\lib\src.zip\java.base.

You can click and view the content of each source code file in the list below.

⏎ java/security/interfaces/RSAPrivateKey.java

/*
 * Copyright (c) 1998, 2013, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
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package java.security.interfaces;

import java.math.BigInteger;

/**
 * The interface to an RSA private key.
 *
 * @author Jan Luehe
 * @since 1.2
 *
 *
 * @see RSAPrivateCrtKey
 */

public interface RSAPrivateKey extends java.security.PrivateKey, RSAKey
{

    /**
     * The type fingerprint that is set to indicate
     * serialization compatibility with a previous
     * version of the type.
     */
    static final long serialVersionUID = 5187144804936595022L;

    /**
     * Returns the private exponent.
     *
     * @return the private exponent
     */
    public BigInteger getPrivateExponent();
}

⏎ java/security/interfaces/RSAPrivateKey.java

Or download all of them as a single archive file:

File name: java.base-11.0.1-src.zip
File size: 8740354 bytes
Release date: 2018-11-04
Download 

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