test.java

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package com.ntsky.reflect;

import java.lang.reflect.*;
public class Test {
    public static void main(String[] args){
    	String firstString = "hello";
    	String secondString = "world";
    	
    	String s = append(firstString,secondString);
    	System.out.println(s);
    }
    
    public static String append(String first,String second){
    	String returnString = null;
    	Class c = String.class;
    	try {
			Method method = c.getMethod("concat",new Class[]{String.class});
			returnString = (String)method.invoke(first,new Object[]{second});
			
		} catch (SecurityException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (NoSuchMethodException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
    	} catch (IllegalArgumentException e1) {
			// TODO Auto-generated catch block
			e1.printStackTrace();
		} catch (IllegalAccessException e2) {
			// TODO Auto-generated catch block
			e2.printStackTrace();
		} catch (InvocationTargetException e3) {
			// TODO Auto-generated catch block
			e3.printStackTrace();
		}    	
    	return returnString;
    }
}