Using Java Generics with Enums -

-

Update: Thanks for all people who help - the answer to who I was More complex code is not being ignored and I did not know about Java 5 code type types.

Original post:

I am playing with something this morning. Although I know that I can deal with this whole problem differently, I have to find out that the way I was hoping it is not working, I feel mad Has been doing. After spending some time in reading around this, I understand that I am not close to understanding, so I have to present it as a question to see if I am just stupid or if really That's what I'm not coming here.

I created a custom event hierarchy such as: 

  Public abstract class abstract essive {Private S src; Private T. ID; Public Abbeycher Event (SKR, T ID) {this.src = src; This.id = ID; } Public S getSource () {Return src; } Public T getId () {Return ID; }}

With such a concrete implementation: 

  Public Class Expands MyEvent AbstractEvent < String, MyEvent.Type & gt; {Public Enum Type {SELECTED, SELECTION_CLEARED}; Public MyEvent (string source, type T) {super (src, t); }}

And then I will create an event such as: 

  fireEvent (new MyEvent ("MyClass.myMethod", MyEvent.Type.SELECTED));

Where my firewire is defined: 

  Secure void fireEvent (MyEvent event) {for (EventListener l: getListeners ()) {switch ( Event. GetId ()) {Case selected: L. Selected (event); break; Case SELECTION_CLEARED: l.unselect (event); break; }}}

So I thought it would be very straightforward, but it came to know that call to event.getId () will tell in the compiler that I can not switch to Enums, only convertible It is possible to add the following method to MyEvent: difference value or ANIM constant 

  public type getId () {return super.getId (); }

Once I do this, everything works properly as I expected I am not interested in finding a workaround for this matter (because I clearly I am interested in people with any insights because this does not work because I hope it is right from the bat. getId () into your own class as the Java can handle in run-time.


Comments

Post a Comment

Popular posts from this blog

c# - ListView onScroll event -

-
I am programming a simple C # application, and I need a Scallow event on the list view. So I inherited the original ListView class created in ListviewEx witch. I found out how to locate the scroll message from WinAPI and I modified the WndProc method. Now I have this WndProc: protected override zero WndProc (Ref message message) {base.WndProc (Ref I); If (m.msg == WM_VSCROLL) {onScroll (This, New EventArgs ()); }} But the problem is, I do not know how to know about scrolling information. This data should be in wParam, but there is a LOWORD macro ++ like in C in C # and I switch to find the criteria like SB_ below, SB_ENDSCROLL, SB_PAGEUP etc. there any way Need to change the LOWORD macro from C #? Or any other way to find the necessary parameters about scrolling? You can define the WParam constants as the following: Private const int WM_HSCROLL = 0x114; Private Constant WM_VSCROLL = 0x115; Private contact int SBHOZZ = 0; Private Consultant SB_VERT = 1; Private Con...
Read more

PHP - get image from byte array -

-
I am trying to create a back-end for my mobile application. I am sending the content of an image in the body of the HTTP request (output stream) as a byte array, I want to read this stream of bytes in PHP scripts and take back an image. Can anyone tell me how can I do this? Thank you. You can obtain the request body $ body = Reading from file_get_contents ('php: // input'); What you do with that data Depending on you, you can write the data in a file as you mentioned that this is image data, you can drop the data into the object can do. Another option is to use and load the image.
Read more

Linux Terminal Problem with Non-Canonical Terminal I/O app -

-
I have a small app written in C to run on Linux. Part of the app accepts user-input from keyboard , And it uses non-canonical terminal mode so that it can respond to each keystroke. The section of the code that accepts input is a simple task that is called repeatedly in the loop: char get_input () {char C = 0; Int res = reading (input_tamille, & amp; c, 1); If (RSS == 0) 0 returns; If (res == -1) {/ * snip error handling * /} return c; } It reads a letter from the terminal if there is no input within a given time limit, (c_cc [VTIME] value in the vocabulary structure), read () 0 And get_input () is called again It all works very well, I have recently discovered that if you run this app in a terminal window, and then the app Close the terminal window without ending, the app will not exit Received, but CPU intensive launches into an infinite loop, where the read () returns 0 without waiting continued. So how can I get out of the apple if it runs from the terminal win...
Read more