Compiling problem when importing third-party package

Question

Hi,
I have a question about compiling a java application program. I tried to use a free package from third-party, say "abc.jar". I added it to my classpath by setting Win2000 CLASSPATH environmental variable.
When I compile the program, it complained that it can not find the classes inside the abc.jar file.
My program is located at: C:\test\Test.java. The abc.jar file is located at: C:\libraries\abc.jar. It is already set in classpath.
Here is the structure of Test.java:
import com.abc.def.ghi.PLOT;
import com.abc.def.ghi.GRAPH;
class Test {
//main method using PLOT and GRAPH classes from abc.jar
Suppose now I am in C:\test\ directory, this does not work.
javac Test.java
Then still in C:\test\ directory,I tried:
javac -classpath ".;c:\libraries\abc.jar" Test.java
Still it does not work, it complains that it can not resolve symbol "PLOT","GRAPH".
How to solve this problem?
Thanks.

Answer 1

I'd put that JAR file in the same directory your Test.java file is in for now. You should keep it close to the Java files that use it in any case, IMO.
Ditch that system CLASSPATH. (I don't have one.) You should always set the CLASSPATH as you need it when you compile and run.
The statement you need to compile is:
javac -classpath .;abc.jar Test.javaIf that works, you run by typing:
java -classpath .;abc.jar TestThis assumes no package statement in Test.java.
Are you sure that JAR contains two files named PLOT.class and GRAPH.class, both with paths com.abc.def.ghi? If not, the class loader won't find them in the JAR.
It'd be better if you cut & pasted the message verbatim. If you've quoted it properly, the error you got sure is weird.
That message means you've got a CLASSPATH problem. It's the stumbling block of every newbie. Don't rest until you figure out what you've done wrong. - MOD