Operational Systems & Java

Answer:  Unfortunately there is no command as "cls", but try this instead:

for    (int i=0; i<25; i++)  System.out.println();

It will print 25 empty lines and they will move current printouts up

Q: Why my program does not give the address of the local machine on one PC

and give on another?

Answer:  As long as you have TCP/IP installed, you should at least get 127.0.0.1

Can applet corrupt my registry file?

Q: I have written a java applet for displaying my genealogy. It has worked fine at

home. My brother tested it on my web site with no problems. BUT, the third person I

asked to take a look at it reported, that though it worked fine, when he exited the

page, his system locked up and he had to reboot. After the reboot he said his registry

was corrupted and had to be restored.

Has anyone seen anything like this? if so, do you have any suggestions as to

probable cause and fix?

Answer:  Any time you don t shutdown properly, your registry can be corrupted, even

if the program that did the freezing was not even using the registry.

The registry is one of the stupidest ideas ever conceived in computer science. It puts

ALL your eggs in one basket.

by Roedy Green

For the JAVA GLOSSARY see 

http://mindprod.com/jgloss.html

 Q: Does anybody know how to find out the complete path of a system default

browser (if there s such) from a Java stand alone app?

Answer: Under Windows you can  invoke  the default browser calling 

 start filename.html , under Unix is a lot more complicated because nobody can

assure you that a browser exists and the user is under X....

Davide

 Q: ...The problem is that, after the file is uploaded to the server, every end of line

is placed with ^M character...

I have written a servlet which uploads a file from client(Win32) to server (Unix). I

have used DataInputStream to read the file in bytes and FileOutputStream to write

the file to the location in the server.

The problem is that, after the file is uploaded to the server, every end of line is placed

with ^M character. This problem is faced only when I upload to Unix Server from

Windows O/S.

Answer: This is normal, I think. A line ends with a single return symbol in Unix and

ends with a return symbol and a switching line symbol in Windows. The editor in Unix

shows "^M" when it meets the switching line symbol.

So to fix this bug, you can remove the switching line symbol in the end of lines when

you upload files from Windows to Unix.

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