How do I import classes in a jar file?

Question

I have the following directory structure, each directory is a seperate package of the same name as the directory
RPGUniversal
RPGMap
RPGCharacter
RPGCharacter is not done yet so I am ignoring that package for now.
RPGCharacter and RPGMap both depends on classes inside the RPGUniversal Package, but are independant of eachother and RPGUniversal is completely independant.
I want to place each package in it's own .jar file for use as a library in later programs.
I placed all the compiled classes for RPGUniversal inside the proper directory structure, I then used this command to place it in a jar:
jar -cf ./RPGUniversal.jar ./RPGUniversal/*
I then tested the contents with this command:
exodist@Abydos:/stuff/JProject/test$ jar -tf RPGUniversal.jar
META-INF/
META-INF/MANIFEST.MF
RPGUniversal/ADTs/
RPGUniversal/ADTs/t1.jpg
RPGUniversal/ADTs/t2.jpg
RPGUniversal/ADTs/t3.jpg
RPGUniversal/ADTs/t4.jpg
RPGUniversal/ADTs/Coordinates.class
RPGUniversal/ADTs/RPGImage.class
RPGUniversal/ADTs/FrameSet.class
RPGUniversal/ADTs/ImageTester.class
RPGUniversal/Exceptions/
RPGUniversal/Interfaces/
RPGUniversal/Interfaces/RPGCharacter.class
RPGUniversal/Interfaces/RPGItem.class
RPGUniversal/Interfaces/RPGObject.class
RPGUniversal/Interfaces/Trackable.class
RPGUniversal/Interfaces/Tracker.class
RPGUniversal/Interfaces/RPGMapComponent.class
RPGUniversal/Interfaces/RPGMap.class
so far all good, next I delete the RPGUniversal directory leaving the only file in the current directory RPGUniversal.jar
next I create the RPGMap directory and give it the proper .java files and directory tree.
I then run a script to compile every .java file
for i in `find ./ -name "*.java"`; do javac "$i"; done
and I get a ton of dependancy errors:
exodist@Abydos:/stuff/JProject/test$ for i in `find ./ -name "*.java"`; do javac "$i"; done
./RPGMap/BaseClasses/StaticMap.java:13: package RPGUniversal.Interfaces does not exist
import RPGUniversal.Interfaces.*;
^
./RPGMap/BaseClasses/StaticMap.java:20: cannot resolve symbol
symbol : class RPGMap
location: class RPGMap.BaseClasses.StaticMap
public abstract class StaticMap implements RPGMap
^
./RPGMap/ComponentClasses/MapTile.java:9: package RPGUniversal.Interfaces does not exist
import RPGUniversal.Interfaces.*;
^
./RPGMap/ComponentClasses/MapTile.java:10: package RPGUniversal.ADTs does not exist
import RPGUniversal.ADTs.*;
^
./RPGMap/ComponentClasses/MapTile.java:16: cannot resolve symbol
symbol : class RPGObject
location: class RPGMap.ComponentClasses.MapTile
public class MapTile implements RPGObject
^
./RPGMap/ComponentClasses/MapTile.java:19: cannot resolve symbol
symbol : class RPGImage
location: class RPGMap.ComponentClasses.MapTile
private RPGImage MyImage;
^
./RPGMap/ComponentClasses/MapTile.java:31: cannot resolve symbol
symbol : class Coordinates
location: class RPGMap.ComponentClasses.MapTile
public boolean CheckForCollision(Coordinates C)
....the list goes on........
how do I tell it to look inside the RPGUniversal.jar file to find the required classes?
here is a directory tree so you can see how it is set up:
ls -R1
RPGMap/
RPGUniversal.jar
./RPGMap:
BaseClasses/
ComponentClasses/
ExternalInterfaces/
HigherClasses/
InternalInterfaces/
./RPGMap/BaseClasses:
StaticMap.java
./RPGMap/ComponentClasses:
MapTable.java
MapTile.java
TableList.java
TileSet.java
./RPGMap/ExternalInterfaces:
./RPGMap/HigherClasses:
DynamicMap.java
./RPGMap/InternalInterfaces:

Answer 1

The JAR file needs to be in the compliers classpath : javac -classpath "$CLASSPATH:RPGUniversal.jar" "$i"