Jar doesn't work while java work fine

Question

I have a similar but not same case as "Please Help, jar file don't work" that is on 4/20. My program works fine by java class execution, but when I put them to jar it generates NullPointerException. The program get data from separate csv files. The error I get by executing jar is quite same as when I delete csv files and execute java. Only one jar file involves. csv files are in the same directory as class files.
- My manifest file is;
Manifest-Version: 1.0
Class-Path: .
Main-Class: MetricConverter
Created-By: 1.4.2_07 (Sun Microsystems Inc.)
I tried different Class-path possibility, but same result.
java.lang.NullPointerException
at MenueMaker.cahrtMaker(MetricConverter.java:71)
at MenueMaker.<init>(MetricConverter.java:53)
at MetricConverter.MetricConverter(MetricConverter.java:81)
at MetricConverter$1.run(MetricConverter.java:33)
at java.awt.event.InvocationEvent(EventQueue.java:178)
at java.awt.EventQueue.dispatchEvent(Unknown Source:454)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(Unknown Source:201)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source:151)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source:145)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source:137)
at java.awt.EventDispatchThread.run(Unknown Source:100)
Classes used in the program are;
MetricConverter (Main) that has >$1
MenueMaker that has > $1,$2,$3,$4,$5
ReadCSV
When I delete csv files from the directory and execute java, the following line is added to 1st line of above Exception message.
at ReadCSV.readCSV(MertricConverter.java:272)
The following is chartMaker method;
public void chartMaker(){
String[][] gotChart=null;
chart=new String[4][][];
int index=0;
for(int i=0; i<4 ; i++){
URL pickURL=getClass().getResource("csv"+i+".csv");
ReadCSV file=new ReadCSV();
try{
gotChart=file.readCSV(pickURL,0);
}catch(IOException e){}
int a1=0;
int a2=0;
while(a1<gotChart.length){
while(a2<gotChart[a1].length){
a2++;
a1++;
index=i;
chart[index]=new String[a1][a2];
chart[index]=gotChart;
I have looked every place I can imagine for a day, but found no answer. Since it works fine with java it should be with jar archiving.
Any advice will be appreciated.
Thanks.

Answer 1

atmguy, thanks for sticking with this.
I spend a half day again studying this.
A new founding that is jar is getting csv files from outside of jar archive.
My command to make jar is "jar cvfm MetricConverter.jar mym *.class si.au source"
source folder has 4 csv files. and result is,
added manifest
adding: MenueMaker$1.class(in = 809) (out= 515)(deflated 36%)
adding: MenueMaker$2.class(in = 699) (out= 472)(deflated 32%)
adding: MenueMaker$3.class(in = 589) (out= 398)(deflated 32%)
adding: MenueMaker$4.class(in = 1714) (out= 950)(deflated 44%)
adding: MenueMaker$5.class(in = 667) (out= 436)(deflated 34%)
adding: MenueMaker.class(in = 5168) (out= 2824)(deflated 45%)
adding: MetricConverter$1.class(in = 349) (out= 247)(deflated 29%)
adding: MetricConverter.class(in = 1068) (out= 677)(deflated 36%)
adding: ReadCSV.class(in = 1459) (out= 913)(deflated 37%)
adding: s1.au(in = 55708) (out= 44941)(deflated 19%)
adding: source/(in = 0) (out= 0)(stored 0%)
adding: source/csv0.csv(in = 543) (out= 254)(deflated 53%)
adding: source/csv1.csv(in = 765) (out= 365)(deflated 52%)
adding: source/csv2.csv(in = 340) (out= 191)(deflated 43%)
adding: source/csv3.csv(in = 1004) (out= 497)(deflated 50%)
Double Clicking MetricConverter.jar with the source folder in the same directory open the program even copying them to other directories. However, from desk top or my document doesn't work (seems to me space in the directory name?). Without source folder console shows NullPointerException at ReadCSV.. The program cannot find csv files.
Another thing that is the program only works when manifest file has class-path : . and <cade> URL pickURL=getClass().getResource("./source/csv"+i+".csv");
has ./.
I tried making source.jar and putting index using "jar -i MetricConverter.jar" with "class-path: source.jar" in manifest, and use jnlp, but nothing works.
You seems to me an experienced java programer. If you don't mind look this at www.mixvision.net/java/MetricConverter.jnlp, also I leave www.mixvision.net/java accessible for now.
Thanks again.