October 12, 2008 05:25am pdt

1. CEHJ 1,193,414
2. objects 712,700
3. cmalakar 275,397
4. sciuriware 228,290
5. ksivananth 223,815
6. MicheleM... 139,343
7. Bart_Cr 130,546
8. ysnky 105,684
9. contactka... 105,616
10. krakatoa 98,410
11. mwvisa1 95,477
12. Ajay-Singh 77,545
13. mbodewes 72,547
14. dejanpazin 63,750
15. Venabili 63,586
16. girionis 57,915
17. aiklamha 48,300
18. rrz@87... 46,390
19. humanono... 43,292
20. shivaspk 41,858
21. melchkish... 41,019
22. ADSLMark 36,393
23. manuel_m 32,075
24. brunoguim... 30,825
25. mrcoffee... 30,290

1. objects 9,825,466
2. CEHJ 8,344,317
3. zzynx 1,588,876
4. mayankea... 1,435,908
5. TimYates 1,319,443
6. girionis 1,019,787
7. sciuriware 963,522
8. Ajay-Singh 742,344
9. ksivananth 577,491
10. heyhey_ 515,764
11. aozarov 483,814
12. Javatm 456,951
13. jim_cakalic 421,656
14. orangehe... 393,681
15. hoomanv 378,789
16. Webstorm 359,422
17. sudhakar... 349,968
18. bloodredsun 321,737
19. StillUnAw... 300,197
20. cmalakar 296,849
21. suprapto45 291,202
22. Giant2 287,095
23. petmagdy 285,438
24. contactka... 233,781
25. dejanpazin 228,212

05.07.2008 at 07:10PM PDT, ID: 23384868

	[x] Attachment Details

[x]

The Solution Rating System

With so many solutions, how can you tell which solutions are most likely to help you and which ones are not? To provide you with a tool to use, we rate our solutions based on various elements that most accurately determine if a solution is a quality solution. To explain what factors affect the solution rating, here are the elements we take into consideration when formulating our solution rating.

The Grade of the Solution
The Zone Rank of the Expert Providing the Solution
The Number of Author and Expert Comments
The Number of Experts Contributing
The Feedback of the Community

Your Input Matters
Because of the way the system is set up, the most important variable in this equation is you. As a member of Experts Exchange, you are able to cast your vote on the quality of the solutions in regard to how complete, accurate, helpful and easy to understand each solution is. When you provide your feedback, each rating is adjusted accordingly. So, if you see a solution that has a poor rating that you think is a good solution, let us know by rating it. As you do, the rating will be adjusted and will become more accurate for other members of our site.

If you have any suggestions that you would like to make for our rating system, please ask a question in the Suggestions Zone of Community Support.

Thank you!

9.1

Problem with socket, readobject and instanceof

Asked by ikjop in Java Programming Language, Programming Languages, J2EE

Tags: Sun, Java, 1.6.0_06

I'm building a client/server application, when a client logs onto the server he sends his "clientobject" (Classname Speler) to the server. The server should notice that when he recieves an instance of "Speler" it's a new client on the server. I've written the following code to do this. (see code snipped)..

The error is in

if(messageObject instanceof Speler) {
System.out.println("here230");
server.frmMain.addUserOnlineEvent((Speler) messageObject);
}

After debugging i can see that messageObject is indeed of the type Speler (i added a watch to "messageObject"), but for some reason he can't check it because he says that "Speler is not a known variable in the current context". I don't understand ? Speler is a class in the same package, hé even listed "Speler" in the code completion list. What mistake did i make, please help :)Start Free Trial

         
           
             1:
2:
3:
4:
5:
6:
7:
8:
9:
10:
11:
12:
13:
14:
15:
16:
17:
18:
19:
20:
21:
22:
23:
24:
25:
26:
27:
28:
29:
30:
31:
32:
33:
34:
35:
36:
37:
38:

           
           
             public void run(){
        try {
            
            //wachten op inkomende message
            boolean stop = false;
        
            while(!stop) {
 
                Object messageObject = istream.readObject();                
                
               if(messageObject instanceof Speler) {
                    System.out.println("here230");
                    server.frmMain.addUserOnlineEvent((Speler) messageObject);
                }
        }
            
        } catch(IOException ex){
            ex.printStackTrace();
        }  catch (ClassNotFoundException ex) {
            ex.printStackTrace();
        } finally {
            try {
                if (link != null){
 
                    ostream.writeObject("QUIT!!!");
 
                    server.removeClientHandler(this);
                    server.setClientCount(server.getClientCount()-1);
                    
                    link.close();
                }
            }
            
            catch(IOException e){
                e.printStackTrace();
            }
        }
    }

           
         

Keywords: Problem with socket, readobject and i…

	Title
1	instanceof
2	Replacement for using instanceOf oper…
3	instanceof operator
4	instanceof in C++
5	exception instanceof
6	instanceof array

Loading Advertisement...

20080924-EE-VQP-39 / EE_QW_2_20070628

Problem with socket, readobject and instanceof

Asked by ikjop in Java Programming Language, Programming Languages, J2EE

Tags: Sun, Java, 1.6.0_06

About this solution