?? sampleinvoke.java
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/* * Copyright (c) 1995-1998 Sun Microsystems, Inc. All Rights Reserved. * * Permission to use, copy, modify, and distribute this software * and its documentation for NON-COMMERCIAL purposes and without * fee is hereby granted provided that this copyright notice * appears in all copies. Please refer to the file "copyright.html" * for further important copyright and licensing information. * * SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF * THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED * TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A * PARTICULAR PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. */import java.lang.reflect.*;class SampleInvoke { public static void main(String[] args) { String firstWord = "Hello "; String secondWord = "everybody."; String bothWords = append(firstWord, secondWord); System.out.println(bothWords); } public static String append(String firstWord, String secondWord) { String result = null; Class c = String.class; Class[] parameterTypes = new Class[] {String.class}; Method concatMethod; Object[] arguments = new Object[] {secondWord}; try { concatMethod = c.getMethod("concat", parameterTypes); result = (String) concatMethod.invoke(firstWord, arguments); } catch (NoSuchMethodException e) { System.out.println(e); } catch (IllegalAccessException e) { System.out.println(e); } catch (InvocationTargetException e) { System.out.println(e); } return result; }}
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