JDK 11 jdk.jshell.jmod - JShell Tool

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.

✍: FYIcenter

jdk/jshell/Util.java

/*
 * Copyright (c) 2014, 2018, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
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 */

package jdk.jshell;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Locale;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.stream.Stream;
import java.util.stream.StreamSupport;
import javax.lang.model.element.Name;

/**
 * Assorted shared utilities and constants.
 */
class Util {

    /**
     * The package name of all wrapper classes.
     */
    static final String REPL_PACKAGE = "REPL";

    /**
     * The prefix for all wrapper class names.
     */
    static final String REPL_CLASS_PREFIX = "$JShell$";

    /**
     * The name of the invoke method.
     */
    static final String DOIT_METHOD_NAME = "do_it$";

    /**
     * The prefix for all anonymous classes upgraded to member classes.
     */
    static final String JSHELL_ANONYMOUS = "$JShell$anonymous$";

    /**
     * A pattern matching the full or simple class name of a wrapper class.
     */
    static final Pattern PREFIX_PATTERN = Pattern.compile(
            "(" + REPL_PACKAGE + "\\.)?"
            + "(?<class>" + Pattern.quote(REPL_CLASS_PREFIX)
            + "\\w+" + ")" + "[\\$\\.]?");

    static final String REPL_DOESNOTMATTER_CLASS_NAME = REPL_CLASS_PREFIX + "DOESNOTMATTER";

    static final Locale PARSED_LOCALE = Locale.ROOT;

    static boolean isDoIt(Name name) {
        return isDoIt(name.toString());
    }

    static boolean isDoIt(String sname) {
        return sname.equals(DOIT_METHOD_NAME);
    }

    static String expunge(String s) {
        StringBuilder sb = new StringBuilder();
        for (String comp : PREFIX_PATTERN.split(s)) {
            sb.append(comp);
        }
        return sb.toString();
    }

    /**
     * Check if this is the name of something in JShell.
     *
     * @param s the name of the class, method, variable, ...
     * @return true if it is, or is within a JShell defined wrapper class
     */
    static boolean isInJShellClass(String s) {
        Matcher m = PREFIX_PATTERN.matcher(s);
        return m.find() && m.start() == 0;
    }

    static String asLetters(int i) {
        if (i == 0) {
            return "";
        }

        char buf[] = new char[33];
        int charPos = 32;

        i = -i;
        while (i <= -26) {
            buf[charPos--] = (char) ('A'-(i % 26));
            i = i / 26;
        }
        buf[charPos] = (char) ('A'-i);

        return new String(buf, charPos, (33 - charPos));
    }


    static String trimEnd(String s) {
        int last = s.length() - 1;
        int i = last;
        while (i >= 0 && Character.isWhitespace(s.charAt(i))) {
            --i;
        }
        if (i != last) {
            return s.substring(0, i + 1);
        } else {
            return s;
        }
    }

    static <T> Stream<T> stream(Iterable<T> iterable) {
        return StreamSupport.stream(iterable.spliterator(), false);
    }

    static String[] join(String[] a1, String[] a2) {
        List<String> result = new ArrayList<>();

        result.addAll(Arrays.asList(a1));
        result.addAll(Arrays.asList(a2));

        return result.toArray(new String[0]);
    }

    static class Pair<T, U> {
        final T first;
        final U second;

        Pair(T first, U second) {
            this.first = first;
            this.second = second;
        }
    }
}

jdk/jshell/Util.java

 

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