Java example source code file (T6937244A.java)

This example Java source code file (T6937244A.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

exception, list, printwriter, string, stringwriter, t6937244a, test, util

The T6937244A.java Java example source code

/*
 * Copyright (c) 2010, 2011, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

/*
 * @test
 * @bug 6937244
 * @summary fields display with JVMS names, not Java names
 */

import java.io.*;
import java.util.*;

public class T6937244A {
    public static void main(String[] args) throws Exception {
        new T6937244A().run();
    }

    void run() throws Exception {
        StringWriter sw = new StringWriter();
        PrintWriter pw = new PrintWriter(sw);
        String[] args = { "Test" };
        int rc = com.sun.tools.javap.Main.run(args, pw);
        pw.close();
        String out = sw.toString();
        System.err.println(out);
        if (rc != 0)
            throw new Exception("unexpected exit from javap: " + rc);

        int count = 0;

        for (String line: out.split("[\r\n]+")) {
            if (line.contains("implements")) {
                verify(line, "implements java.util.List<java.lang.String>");
                count++;
            }

            if (line.contains("field")) {
                verify(line, "java.util.List<java.lang.String> field");
                count++;
            }

            if (line.contains("method")) {
                verify(line, "java.util.List<java.lang.String> method(java.util.List) throws java.lang.Exception");
                count++;
            }
        }

        // final backstop check
        if (out.contains("/"))
            throw new Exception("unexpected \"/\" in output");

        if (count != 3)
            throw new Exception("wrong number of matches found: " + count);
    }

    void verify(String line, String expect) throws Exception {
        if (!line.contains(expect)) {
            System.err.println("line:   " + line);
            System.err.println("expect: " + expect);
            throw new Exception("expected string not found in line");
        }
    }
}


abstract class Test implements List<String> {
    public List<String> field;
    public List<String> method(List arg) throws Exception { return null; }
}