Throws Run time error at runtime.

Question

Hi freinds,
I've downloaded special jar file and placed in "C:\j2sdk1.4.2_11\jre\lib\ext".
I've used one of the IO class from this jar file in my Candies.java class.
When i going to compile it from command prompt it compiles dine but at run time while running following command ,
D:\TP>javac Candies.java
D:\TP>java Candies
Exception in thread "main" java.lang.NoClassDefFoundError: ncst/pgdst/IOException
When i compile and run this code with IDE 'JCreator' it works fine.
Why the same application throws run time error at command prompt?
How could i resolve this issue ?
Note:I've also set classpath to "C:\j2sdk1.4.2_11\jre\lib\ext\." .
Regards,
Sachin Warang.

Answer 1

If i placed the jar file some where else how could
used it in my source file?To use a class in your source code, you just import its package and make sure the jar is on the classpath, nothing else is necessary.
I'm stick to command prompt as i want include the
input file(which contains big input) at run time
using the command
D:\TP>java Candies < input
Is it possible with any IDE to include such text file
at run time , if so how could i do this?All IDEs let their users specify parameters for programs they start from within the IDE. See doc of your IDE. (But people here don't recommend IDEs for beginners ;)
But why it compiles fine and giving me Error at run
time if it is not set in the classpath?Looks like it is because that class is not used directly in your code but your code calls another class that uses that missing class.
I've also change the classpath to
"C:\j2sdk1.4.2_11\jre\lib\ext\pgdst.jar\." still the
problem exist , why is it so as i'm giving the actual
path now?You still don't specify the exact jar! E.g: C:\j2sdk1.4.2_11\jre\lib\ext\pgdst.jar\aa.jar
Hope it helps...