package reflectiondemo;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

public class TestReflection {

    public static void main(String[] args) throws ClassNotFoundException, NoSuchMethodException, InvocationTargetException, IllegalAccessException {
        Class RuntimeClass = Class.forName("java.lang.Runtime");
        Method method = RuntimeClass.getMethod("getRuntime");
        Object runtime = method.invoke(RuntimeClass);
        RuntimeClass.getMethod("exec", String.class).invoke(runtime, "gnome-calculator");
    }

}