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 * 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 Oracle or 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,
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 */ 

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();
	}
    }
}