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/nio/charset/StandardCharsets.java

/*
 * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 */
package java.nio.charset;

/**
 * Constant definitions for the standard {@link Charset Charsets}. These
 * charsets are guaranteed to be available on every implementation of the Java
 * platform.
 *
 * @see <a href="Charset.html#standard">Standard Charsets</a>
 * @since 1.7
 */
public final class StandardCharsets {

    // To avoid accidental eager initialization of often unused Charsets
    // from happening while the VM is booting up, which may delay
    // initialization of VM components, we should generally avoid depending
    // on this class from elsewhere in java.base.

    private StandardCharsets() {
        throw new AssertionError("No java.nio.charset.StandardCharsets instances for you!");
    }

    /**
     * Seven-bit ASCII, a.k.a. ISO646-US, a.k.a. the Basic Latin block of the
     * Unicode character set
     */
    public static final Charset US_ASCII = sun.nio.cs.US_ASCII.INSTANCE;
    /**
     * ISO Latin Alphabet No. 1, a.k.a. ISO-LATIN-1
     */
    public static final Charset ISO_8859_1 = sun.nio.cs.ISO_8859_1.INSTANCE;
    /**
     * Eight-bit UCS Transformation Format
     */
    public static final Charset UTF_8 = sun.nio.cs.UTF_8.INSTANCE;
    /**
     * Sixteen-bit UCS Transformation Format, big-endian byte order
     */
    public static final Charset UTF_16BE = new sun.nio.cs.UTF_16BE();
    /**
     * Sixteen-bit UCS Transformation Format, little-endian byte order
     */
    public static final Charset UTF_16LE = new sun.nio.cs.UTF_16LE();
    /**
     * Sixteen-bit UCS Transformation Format, byte order identified by an
     * optional byte-order mark
     */
    public static final Charset UTF_16 = new sun.nio.cs.UTF_16();
}

⏎ java/nio/charset/StandardCharsets.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 

⇒ JDK 11 java.compiler.jmod - Compiler Module

⇐ JDK 11 Modules List

⇑ Download and Use JDK 11

⇑⇑ FAQ for JDK (Java Development Kit)