use reflection to invoke a method

import java.lang.reflect.Method;

public class InvokeTester
{
public int add(int param1, int param2)
{
return param1 + param2;
}

public String echo(String message)
{
return "hello: " + message;
}

public static void main(String[] args) throws Exception
{
InvokeTester test = new InvokeTester();
System.out.println(test.add(1, 2));
System.out.println(test.echo("John"));
                //the above is to use normal ways to use a class and invoke a method
                //the following is to use reflection

Class<?> classType = InvokeTester.class;

Object invokeTester = classType.newInstance();

System.out.println(invokeTester instanceof InvokeTester);

Method addMethod = classType.getMethod("add", new Class[] { int.class,
int.class });

Object result = addMethod.invoke(invokeTester, new Object[]{1, 5});
                // this is something like
                // result=invokeTester.add(1,2)

System.out.println((Integer)result);

System.out.println("---------------------");

Method echoMethod = classType.getMethod("echo", new Class[]{String.class});

Object result2 = echoMethod.invoke(invokeTester, new Object[]{"Clinton"});

System.out.println((String)result2);


}
}