Printable View
i downloaded the compilers for java and i finnaly figured out how to compile a .java file. but i cant seem to be able to run the file. how do i do this? i have my .java file and .class file in my C drive do the paths to them are C:\Hello.java and C:\Hello.class
i tried typing in "java Hello" but it gave me and error.
What error would that be?Quote:
Originally posted by flamewavetech
i tried typing in "java Hello" but it gave me and error.
Exception in thread "main" java.lang.NoClassDefFoundError: Hello
and you were in c:\ when you tried to run it? Did you package it?
what do u mean? i just went to run and typed in command and then typed in java Hello
well, if you don't know what packaging is, then its probably not the problem :p. But, as far as where you are in at the command line...if you have the .class file in c:\ and you are in c:\windows when you type in "java Hello", then it won't work. That's what I meant. It seems like a stupid mistake to make, but it happens sometimes.
:)
the jvm can't find your .class file because you didn't specify the classpath (path of the directory where your class files are)
type this instead
java -classpath c:\ Hello
Yeah flamewavetech you have to use either the -classpath comamand line switch ie........ C:\ java -classpath C:\MyClassDir; myProg or set the CLASSPATH environment variable in your autoexec.bat file. *~Note if you change your autoexec.bat file you have to reboot in order for the changes to take effect.
nah, just call the autoexec again at the command line :pQuote:
Originally posted by Dilenger4
*~Note if you change your autoexec.bat file you have to reboot in order for the changes to take effect.
NT/2000/XP don't have Autoexec.bat. You will have to use Environment tab from the System control applet (or press Windows Key + Pause)
Remember to put a . (dot) after the last path in the classpath or Java can't see your current folder