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Java example source code file (LaunchCommandLine.java)

This example Java source code file (LaunchCommandLine.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

arrayreference, bad, breakpointevent, exception, helloworld, jdi, jdiscaffold, launchcommandline, list, localvariable, stackframe, string, util, wrong

The LaunchCommandLine.java Java example source code

/*
 * Copyright (c) 1999, 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 4245011
 *  @summary Test launcher command line construction
 *  @author Gordon Hirsch
 *
 *  @library scaffold
 *  @run build JDIScaffold VMConnection
 *  @run compile -g HelloWorld.java
 *  @run build LaunchCommandLine
 *
 *  @run main LaunchCommandLine
 */
import com.sun.jdi.*;
import com.sun.jdi.event.*;
import com.sun.jdi.request.*;

import java.util.List;

public class LaunchCommandLine extends JDIScaffold {
    public static void main(String args[]) throws Exception {
        new LaunchCommandLine(args).startTests();
    }

    LaunchCommandLine(String args[]) {
        // args are set in code below
        super();
    }

    protected void runTests() throws Exception {
        String[] args = new String[2];
        args[0] = "-connect";
        args[1] = "com.sun.jdi.CommandLineLaunch:main=HelloWorld a b c \"a b c\"";
        testArgs(args);
        System.out.println("com.sun.jdi.CommandLineLaunch: passed");

        // Add test for RawCommandLineLauncher?
    }

    void testArgs(String[] args) throws Exception {
        connect(args);
        waitForVMStart();

        /*
         * Get to a point where the command line args are accessible.
         */
        BreakpointEvent bp = resumeTo("HelloWorld", "main", "([Ljava/lang/String;)V");

        StackFrame frame = bp.thread().frame(0);
        LocalVariable argsVariable = frame.visibleVariableByName("args");
        ArrayReference argsArray = (ArrayReference)frame.getValue(argsVariable);

        List argValues = argsArray.getValues();

        if (argValues.size() != 4) {
            throw new Exception("Wrong number of command line arguments: " + argValues.size());
        }

        String string = ((StringReference)argValues.get(0)).value();
        if (!string.equals("a")) {
            throw new Exception("Bad command line argument value: " + string);
        }
        string = ((StringReference)argValues.get(1)).value();
        if (!string.equals("b")) {
            throw new Exception("Bad command line argument value: " + string);
        }
        string = ((StringReference)argValues.get(2)).value();
        if (!string.equals("c")) {
            throw new Exception("Bad command line argument value: " + string);
        }
        string = ((StringReference)argValues.get(3)).value();
        if (!string.equals("a b c")) {
            throw new Exception("Bad command line argument value: " + string);
        }

        // Allow application to complete
        resumeToVMDeath();
    }

}

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