在框架中经常会会用到method.invoke()方法,用来执行某个的对象的目标方法。以前写代码用到反射时,总是获取先获取Method,然后传入对应的Class实例对象执行方法。然而前段时间研究invoke方法时,发现invoke方法居然包含多态的特性,这是以前没有考虑过的一个问题。那么Method.invoke()方法的执行过程是怎么实现的?它的多态又...
The JVM creates an internal representation of the class and stores it in the method area. An example of a class method area is shown in above Figure. The following data areas are contained within the internal representation of a class: Runtime Constant Pool contains constants used in a partic...
_methods(methods){//...忽略部分代码for(inti=len-1;i>=0;i--){Method*method=_methods->at(i...
_methods(methods){//...忽略部分代码for(inti=len-1;i>=0;i--){Method*method=_methods->at(i...
Other notes: WebEngine Limits JavaScript Method Calls for Certain Classes JavaScript programs that are run in the context of a web page loaded by WebEngine can communicate with Java objects passed from the application to the JavaScript program. JavaScript programs that reference java.lang.Class objec...
Method animalMethod = Animal.class.getDeclaredMethod("print"); Method catMethod = Cat.class.getDeclaredMethod("print"); Animal animal =new Animal(); Cat cat =new Cat(); animalMethod.invoke(cat); animalMethod.invoke(animal); catMethod.invoke(cat); ...
The two methods perform the same steps when the caller's type descriptor exactly m atches the callee's, but when the types differ, plain #invoke invoke also calls asType (or some internal equivalent) in order to match up the caller's and callee's types. If the current method is a ...
public class MethodInvoke { public static void main(String[] args) throws Exception { Method animalMethod = Animal.class.getDeclaredMethod("print"); Method catMethod = Cat.class.getDeclaredMethod("print"); Animal animal = new Animal(); ...
Memory Model, any method handle will behave as if all of its (internal) fields are final variables. This means that any method handle made visible to the application will always be fully formed. This is true even if the method handle is published through a shared variable in a data race....
invoke()方法定义在java.lang.reflect.Method中,源码如下,前面长长的一串注释详细地描述了invoke方法的使用以及可能抛出的错误。 invoke方法应该由Method对象调用,并传入调用该method的实例对象obj以及需要传入的参数args。 当使用invoke调用static方法的时候,obj参数应当为null ...