Java tutorial
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); } }