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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();
}
}
}
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