reflection

问题 I've taken a class file(say Foo.class ) using JFileChooser and stored it in a File class object(say File a ). now I've to read metadata like methods and variables of this Foo.class using reflection APIs. My question is that, I've stored it in a , which is just a File reference variable . So how can I use any API on a File. or any other suggestion for doing so are also welcomed. 回答1: as i understand,first of all you need to convert class file to Class object you can do that via UrlClassLoader

问题 I have a problem where i need to walk through an object graph and pick out a particular property value. My original solution caches a linked list of property names that need to be applied in order to get from point A to point B in the object graph. I then use apache commons PropertyUtils to iterate through the linked list calling getProperty(Object bean, String name) until i have reached point B. My question is around how this will perform compared to perhaps cahing the Method objects for

问题 I am in the process of creating a factory method which uses a generic abstract type parameter to return the instance of the concrete derived type using reflection. For eg. public abstract class ServiceClientBase : IServiceClient { } public abstract class Channel : ServiceClientBase { } public class ChannelImpl : Channel { } public class ServiceClientFactory { public T GetService<T>() where T : class, IServiceClient { // Use reflection to create the derived type instance T instance = typeof(T)

问题 I am in the process of creating a factory method which uses a generic abstract type parameter to return the instance of the concrete derived type using reflection. For eg. public abstract class ServiceClientBase : IServiceClient { } public abstract class Channel : ServiceClientBase { } public class ChannelImpl : Channel { } public class ServiceClientFactory { public T GetService<T>() where T : class, IServiceClient { // Use reflection to create the derived type instance T instance = typeof(T)

问题 I am in the process of creating a factory method which uses a generic abstract type parameter to return the instance of the concrete derived type using reflection. For eg. public abstract class ServiceClientBase : IServiceClient { } public abstract class Channel : ServiceClientBase { } public class ChannelImpl : Channel { } public class ServiceClientFactory { public T GetService<T>() where T : class, IServiceClient { // Use reflection to create the derived type instance T instance = typeof(T)

问题 The Problem : I've been searching on here for a while looking for a way to loop through variables named somewhat like variable_1 , variable_2 , ...., variable_n . Basically, I'm asking if there's a way to do that using a loop to achieve variable_i or, more specifically in my case, functionName_i . What I need : I'm trying to loop an objects' array to call different functions which are sequentially-named and parallel to the objects' array ( i.e: obj[ i ]->callback_i( ) ) What I Know :

问题 I am attempting to cycle through the Fields in my class, place the fields of a certain type into a list and then return that list. I know I am missing some key component but I cannot figure out what I am doing wrong. This is what I have so far: ... I need to return a list of the actual fields as pointers, not a copy of the data. Any help in getting this to work would be appreciated. I removed the above code (you should still be able to see it in the history) because it was confusing. This is

问题 Most F# Message Passing examples I've seen so far are working with 2-4 message types, and are able to utilize pattern matching to direct each message to its proper handler function. For my application, I need hundreds of unique message types due to the different nature of their handling and required parameters. So far, each message type is its own record type with a marker interface attached, because including hundreds of types in a single discriminated union would not be very pretty - and

问题 Most F# Message Passing examples I've seen so far are working with 2-4 message types, and are able to utilize pattern matching to direct each message to its proper handler function. For my application, I need hundreds of unique message types due to the different nature of their handling and required parameters. So far, each message type is its own record type with a marker interface attached, because including hundreds of types in a single discriminated union would not be very pretty - and

问题 I have a package package one.two.three and in that package I have public trait first public class Second and pubic class Third I want to get all the classes and interface(in one.two.three) names as Strings. heard that the best way to do it is using reflection. can someone tell me a way to do that thing please. 回答1: Well, that is a bit more complex task than one would thought. For instance, you may have classes in the same package but in different locations (e.g., 2 JAR files loaded by an