JDK 11 jdk.jshell.jmod is the JMOD file for JDK 11 JShell tool, which can be invoked by the "jshell" command.

JDK 11 JShell tool compiled class files are stored in \fyicenter\jdk-11.0.1\jmods\jdk.jshell.jmod.

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

JDK 11 JShell tool source code files are stored in \fyicenter\jdk-11.0.1\lib\src.zip\jdk.jshell.

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

⏎ jdk/internal/jshell/debug/InternalDebugControl.java

/*
 * Copyright (c) 2015, 2017, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
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 */

package jdk.internal.jshell.debug;

import java.io.PrintStream;
import java.util.HashMap;
import java.util.Map;
import jdk.jshell.JShell;

/**
 * This class is used to externally control output messages for debugging the
 * implementation of the JShell API.
 * <p>
 * This is not part of the SPI nor API.
 */
public class InternalDebugControl {

    /**
     * This is a static only class; The constructor should never be called.
     */
    private InternalDebugControl() {
    }

    /**
     * General debugging.
     */
    public static final int DBG_GEN = 0b0000001;

    /**
     * File manager debuging.
     */
    public static final int DBG_FMGR = 0b0000010;

    /**
     * Completion analysis debugging.
     */
    public static final int DBG_COMPA = 0b0000100;

    /**
     * Dependency debugging.
     */
    public static final int DBG_DEP = 0b0001000;

    /**
     * Event debugging.
     */
    public static final int DBG_EVNT = 0b0010000;

    /**
     * Event debugging.
     */
    public static final int DBG_WRAP = 0b0100000;

    private static Map<JShell, Integer> debugMap = null;

    /**
     * Sets which debug flags are enabled for a given JShell instance. The flags
     * are or'ed bits as defined in {@code DBG_*}.
     *
     * @param state the JShell instance
     * @param flags the or'ed debug bits
     */
    public static void setDebugFlags(JShell state, int flags) {
        if (debugMap == null) {
            debugMap = new HashMap<>();
        }
        debugMap.put(state, flags);
    }

    /**
     * Release a JShell instance.
     *
     * @param state the JShell instance
     */
    public static void release(JShell state) {
        if (debugMap != null) {
            debugMap.remove(state);
        }
    }

    /**
     * Tests if any of the specified debug flags are enabled.
     *
     * @param state the JShell instance
     * @param flag the {@code DBG_*} bits to check
     * @return true if any of the flags are enabled
     */
    public static boolean isDebugEnabled(JShell state, int flag) {
        if (debugMap == null) {
            return false;
        }
        Integer flags = debugMap.get(state);
        if (flags == null) {
            return false;
        }
        return (flags & flag) != 0;
    }

    /**
     * Displays debug info if the specified debug flags are enabled.
     *
     * @param state the current JShell instance
     * @param err the {@code PrintStream} to report on
     * @param flags {@code DBG_*} flag bits to check
     * @param format format string for the output
     * @param args args for the format string
     */
    public static void debug(JShell state, PrintStream err, int flags, String format, Object... args) {
        if (isDebugEnabled(state, flags)) {
            err.printf(format, args);
        }
    }

    /**
     * Displays a fatal exception as debug info.
     *
     * @param state the current JShell instance
     * @param err the {@code PrintStream} to report on
     * @param ex the fatal Exception
     * @param where additional context
     */
    public static void debug(JShell state, PrintStream err, Throwable ex, String where) {
        if (isDebugEnabled(state, 0xFFFFFFFF)) {
            err.printf("Fatal error: %s: %s\n", where, ex.getMessage());
            ex.printStackTrace(err);
        }
    }
}

⏎ jdk/internal/jshell/debug/InternalDebugControl.java

Or download all of them as a single archive file:

File name: jdk.jshell-11.0.1-src.zip
File size: 283093 bytes
Release date: 2018-11-04
Download 

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