public class Main {
public static void main(String args[]) throws Exception{
String name = "java.lang.String";
String methodName = "toLowerCase";
Class cl = Class.forName(name);
java.lang.reflect.Constructor constructor = cl.getConstructor(new Class[] { String.class });
Object invoker = constructor.newInstance(new Object[] { "AAA" });
Class arguments[] = new Class[] {};
java.lang.reflect.Method objMethod = cl.getMethod(methodName, arguments);
Object result = objMethod.invoke(invoker, (Object[]) arguments);
System.out.println(result);
}
}