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Java Forum / General / December 2005Applet Problems - Works in appletviewer but not ie
I finished the applet and everything works in using the applet viewer. When I open the htm file that opens the java class, everything works until I get to my high scores screen. when I click that button, It reads from a file and sorts out the high scores and then compares to the current users high score. nothing is written to a file. just read. I am wondering why it wouldn't work in the htm file but would work using appletviewer. If I make it a signed applet will it work? I thought it didn't have to be signed if you are just reading from a file not writing. Anyone have any suggestions? >I finished the applet and everything works in using the applet viewer. > When I open the htm file that opens the java class, everything works [quoted text clipped - 6 lines] > thought it didn't have to be signed if you are just reading from a file > not writing. Yes, you need to sign it to do *any* file access. If not, you would be able to read my "passwors_and_pincodes.txt" file in my root folder... ;-) Read or write doesn't matter.  SignatureDag. Thanks Dag Sunde for the help. ok i've signed other applets but this one isnt working. either something isnt working or im forgetting something... i gotta jar my class.. jar cvf quiz.jar quiz.class then run my key tool... keytool -genkey -alias quiz -validity 365 then enter all my info then last i need to sign the jar file with the jarsigner jarsigner quiz.jar quiz is that all i need to do? i did all that and tried recompiling and it didnt work. i went and deleted my keyfile and retried it and it still didn't work. I'm new to this so any help would be great if im missing anything. Thanks. > Thanks Dag Sunde for the help. > [quoted text clipped - 8 lines] > keytool -genkey -alias quiz -validity 365 > then enter all my info Hmmm... It is a long time since I used a self-signed certificate, and I've never used keytool. But as far as I remember you have to create a "root" certificate, and import that so you become your own CA. Then you use that CA-certificate to create and sign your code-signing certificate. Only now, you have a certificate you can use to sign your jar. The command line I use to create and sign a jar file in one shot is like this: signtool -k"My CommonName" -d. -Z"jarfilename.jar" -p"mypwd" signdir I have alway used OpenSSL to create self-signed server certificates, not code-signing. I use a commercial Verisign certificate for that. Anyway, here's the process for OpenSSL: http://www.dylanbeattie.net/docs/openssl_iis_ssl_howto.html Maybe you can get something from that... SignatureDag. well i got it to work. and now when i click the high scores button. it crashes the whole window. i have it just quiz.htm and it crashes that window and i uploaded it to my ftp and went to that website and ran the signed applet and when i hit the "high scores".. it crashes the whole window and closes it. i guess im stuck and don't know what would cause that. any suggestions/ideas would be appreciated. thanks for your time! well i found out why it crashes and i got it to stop but now i still have a problem. in my catch for reading from the file... some how it would throw and error and my code has it do a system.exit if it does. so now i removed the system.exit... and when it displays the high scores... it just says null 0. cause obviously its not reading them.. i just dont understand how it worked through appletviewer but not worked through regular html file. hmm.. thanks for the help! > well i found out why it crashes and i got it to stop but now i still > have a problem. [quoted text clipped - 7 lines] > i just dont understand how it worked through appletviewer but not > worked through regular html file. hmm.. thanks for the help! In Appletviewer, it is running as a local program, accessing files locally. How do you access the file you try to open? Post the file-reading code. How is your filename and path formatted? SignatureDag. > in my catch for reading from the file... some how it would throw and > error and my code has it do a system.exit if it does. You cannot do a System.exit(n) form within an applet. > so now i removed the system.exit... and when it displays the high > scores... it just says null 0. cause obviously its not reading them.. Where is your applet? Give us the URL so we can see it crash. Link to the code. > i just dont understand how it worked through appletviewer but not > worked through regular html file. hmm.. thanks for the help! Could be due to a number of things. SignatureAndrew Thompson physci, javasaver, 1point1c, lensescapes - athompson.info/andrew Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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