MethodTroubleToo.java Source code

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Here is the source code for MethodTroubleToo.java

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/*
 * Copyright (c) 1995 - 2008 Sun Microsystems, Inc.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 *   - Neither the name of Sun Microsystems nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

import java.lang.reflect.Method;

public class MethodTroubleToo {
    public void ping() {
        System.out.format("PONG!%n");
    }

    public static void main(String... args) {
        try {
            MethodTroubleToo mtt = new MethodTroubleToo();
            Method m = MethodTroubleToo.class.getMethod("ping");

            switch (Integer.parseInt(args[0])) {
            case 0:
                m.invoke(mtt); // works
                break;
            case 1:
                m.invoke(mtt, null); // works (expect compiler warning)
                break;
            case 2:
                Object arg2 = null;
                m.invoke(mtt, arg2); // IllegalArgumentException
                break;
            case 3:
                m.invoke(mtt, new Object[0]); // works
                break;
            case 4:
                Object arg4 = new Object[0];
                m.invoke(mtt, arg4); // IllegalArgumentException
                break;
            default:
                System.out.format("Test not found%n");
            }

            // production code should handle these exceptions more gracefully
        } catch (Exception x) {
            x.printStackTrace();
        }
    }
}