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/tool/IOContext.java

/*
 * Copyright (c) 2015, 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.tool;

import java.io.IOException;

/**
 * Interface for defining user interaction with the shell.
 * @author Robert Field
 */
abstract class IOContext implements AutoCloseable {

    @Override
    public abstract void close() throws IOException;

    public abstract String readLine(String prompt, String prefix) throws IOException, InputInterruptedException;

    public abstract boolean interactiveOutput();

    public abstract Iterable<String> history(boolean currentSession);

    public abstract  boolean terminalEditorRunning();

    public abstract void suspend();

    public abstract void resume();

    public abstract void beforeUserCode();

    public abstract void afterUserCode();

    public abstract void replaceLastHistoryEntry(String source);

    public abstract int readUserInput() throws IOException;

    class InputInterruptedException extends Exception {
        private static final long serialVersionUID = 1L;
    }
}

⏎ jdk/internal/jshell/tool/IOContext.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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