Finding the source code from Jar file

Hi,
I am a beginner java programmer but have been entrusted with learning our company's Java application. The architect of the application is not forthcoming in sharing information and so I need help in tracing the source code for the application. I know where the .jar files are stored but I don't know where the actual .java or .class files are stored.
In the .profile file, I see the classpaths set to various jar files. eg.
CLASSPATH=$PATH:/eaid01_apps/merc01/libs/tools/java/drivers/bin/eaiRun.jar
When I view this jar file with command "jar tf eaiRun.jar", it displays all the files under it. Onc such listing is as following:
citi/eai/EAI.class
citi/eai/Interface.class
I want to go to that specific directory on our file system which is storing these .class or.java file. From what I have learned about packages, I should find some folder called 'citi' ,'eai'.
However I am not able to find these folders anywhere on file system. Is there a way I can find where the actual souce code is by looking at the jar files.
Please help. Let me know if you need more information.
thanks,
Anand.

Is there a way I can find where the actual souce code is by looking at the jar files.No, in general you can't, you should ask the architect that you mentioned earlier. The name of the source file is sometimes stored in the .class file for debugging purposes but that's unlikely going to help you find the files.
You should also ask if he/she has got any documentation of the system. It's often a lot easier to follow documentation written in human language than program code written in a programming language. There could be documentation in a format similar to this: http://java.sun.com/j2se/1.4.2/docs/api/

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Very Easy Question: How to view source code of JAR file

Hi Experts,
1) Can we can see the content of JAR file?
2) How we can we see content of JAR file?
3) I have with me JAR file. It is sap.compcui_gpoadp~ObjectAndDataProvider.JAR. I have to make some changes in the JAR file source code. How I can find the source code?
I tried to see the source code using NWDS. However, I can not see the code.
Regards,
Gaurav

>
Gary wrote:
> Can I make changes in the source code of JAR file? Can I make changes in the code?
You cannot do this by simple repacking/rearchiving of JAR, because it contains special descriptor with fingerprint. In general, JAR is unmodifiable, however, you can create a new one with modified sources.
You can try to import the JAR in some Java project in Eclipse, for example. Then make your changes and use the Eclipse's Export JAR wizard in order to repack the modified source Java files in a new JAR.
>
Gary wrote:
> Can I rename the JAR file and still it will usable? Please confirm.
I general, yes, the operation is allowed. However, you cannot do this with JAR deployed on some J2EE server or Portal, for example. Because there are references to it.
>
Gary wrote:
> Please let me know if by any chance I can see the content of JAR file in NWDS.
Yes, sure. Use Import from Archive wizard in Eclipse. Or add the JAR in the class path of some Java project and Eclipse will show you the content of it.
BR, Sergei

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user570667 wrote:
Hi 2 all,
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Hi,
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FROM [dbo].[INV_SubInvoice] isi JOIN
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FROM
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WHERE [INV_FacilityFeeID]
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FROM
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GROUP BY [iffa].[SectionID])
dates ON [isis_fee].[ID] = [dates].[SectionID] LEFT JOIN
(SELECT *
FROM
[dbo].[INV_FacilityFeeAccrual]) unpaid ON [dates].[SectionID] = [unpaid].[SectionID] AND
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FROM
[dbo].[INV_FacilityFeeAccrual]
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[FacilityFeeID] = NULL, [il].[LoanID], [isi].[PortfolioID], [isi].[Portfolio],
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= [il].[Name], [ReceivedAmount], [CurrentDueAmount], [PastDueAmount] = CASE WHEN ISNULL([ReceivedAmount],
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0) WHEN ISNULL([ReceivedAmount], 0)
< 0 THEN /* We bring past due to zero and
apply rest to current. */ CASE WHEN [PastDueAmount] + ISNULL([ReceivedAmount], 0)
< 0 THEN 0 ELSE [PastDueAmount] + ISNULL([ReceivedAmount],
0) END WHEN ISNULL([ReceivedAmount], 0) = 0 AND
[PastDueAmount] < 0 THEN 0 ELSE [PastDueAmount]
END,
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= 'LOAN_PRIN' THEN 0 ELSE CASE WHEN ISNULL([ReceivedAmount], 0)
< 0 THEN /* We bring past due to zero and
apply rest to current. */ CASE WHEN [PastDueAmount] + ISNULL([ReceivedAmount], 0)
< 0 THEN - ([PastDueAmount] + ISNULL([ReceivedAmount],
0)) ELSE 0 END WHEN ISNULL([ReceivedAmount], 0) = 0 AND
[PastDueAmount] < 0 THEN - [PastDueAmount]
ELSE 0 END END,
[AmountDue] = CASE WHEN [isis_loan].[SectionTypeCode]
= 'LOAN_PRIN' THEN [CurrentDueAmount] ELSE [unpaid].[AmountDue] END, [ID] = [il].[LoanID]
FROM [dbo].[INV_SubInvoice] isi JOIN
[dbo].[INV_Invoice] ii ON [isi].[InvoiceID]
= [ii].[ID] JOIN
[dbo].[INV_Facility] [if] ON [isi].[ID] = [if].[SubInvoiceID]
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(SELECT [sis_loan].[ID],
[sis_loan].[SectionTypeCode], [SectionType] = [st_loan].[Name], [sis_loan].[INV_LoanID]
FROM
[dbo].[INV_SubInvoiceSection] sis_loan JOIN
[dbo].[INV_SectionType] st_loan ON [sis_loan].[SectionTypeCode] = [st_loan].[Code]
WHERE [INV_LoanID]
IS NOT NULL AND [StatusCode] = 'BILL') isis_loan ON [il].[ID] = [isis_loan].[INV_LoanID] JOIN
(SELECT [iffa].[SectionID],
[AccrualDeterminationDateMax] = MAX([iffa].[AccrualDeterminationDate]),
[AccrualDeterminationDateMin] = MIN([iffa].[AccrualDeterminationDate]), [CurrentDueAmount] = SUM([iffa].[ExpectedPrincipalAmount]),
[ReceivedAmount] = SUM([ReceivedPrincipalAmount])
FROM
[dbo].[INV_LoanPrincipalAmortization] iffa
GROUP BY [iffa].[SectionID]
UNION
SELECT [iffa].[SectionID],
[AccrualDeterminationDateMax] = MAX([iffa].[AccrualDeterminationDate]),
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FROM
[dbo].[INV_LoanCashInterestAccrual] iffa
GROUP BY [iffa].[SectionID]
UNION
SELECT [iffa].[SectionID],
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[AccrualDeterminationDateMin] = MIN([iffa].[AccrualDeterminationDate]), [CurrentDueAmount] = SUM([iffa].[AccruedInterestAmount]),
[ReceivedAmount] = SUM([ReceivedInterestAmount])
FROM
[dbo].[INV_LoanPIKInterestAccrual] iffa
GROUP BY [iffa].[SectionID])
dates ON [isis_loan].[ID] = [dates].[SectionID] LEFT JOIN
(SELECT [AmountDue]
= [UnpaidPrincipalAmount], [SectionID], [AccrualDeterminationDate]
FROM
[dbo].[INV_LoanPrincipalAmortization]
UNION
SELECT [AmountDue]
= [UnpaidInterestAmount], [SectionID], [AccrualDeterminationDate]
FROM
[dbo].[INV_LoanCashInterestAccrual]
UNION
SELECT [AmountDue]
= [UnpaidInterestAmount], [SectionID], [AccrualDeterminationDate]
FROM
[dbo].[INV_LoanPIKInterestAccrual]) unpaid ON [dates].[SectionID] = [unpaid].[SectionID] AND
[dates].[AccrualDeterminationDateMax] = [unpaid].[AccrualDeterminationDate]
LEFT JOIN
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FROM
[dbo].[INV_LoanPrincipalAmortization]
GROUP BY [SectionID]
UNION
SELECT [PastDueAmount]
= SUM([PastDueInterestAmount]), [SectionID]
FROM
[dbo].[INV_LoanCashInterestAccrual]
GROUP BY [SectionID]
UNION
SELECT [PastDueAmount]
= SUM([PastDueInterestAmount]), [SectionID]
FROM
[dbo].[INV_LoanPIKInterestAccrual]
GROUP BY [SectionID]) pastdue
ON [dates].[SectionID] = [pastdue].[SectionID]
UNION
SELECT [isi].[InvoiceID], [ii].[DueDate], [SubInvoiceID] = [isi].[ID], [INV_FacilityID] = [if].[ID], [if].[FacilityID],
[FacilityFeeID] = NULL, [il].[LoanID], [isi].[PortfolioID], [isi].[Portfolio],
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= [il].[Name], [ReceivedAmount], [CurrentDueAmount] = - [dates].[CurrentDueAmount],
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< 0 THEN /* We bring past due to zero and
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0)) ELSE 0 END WHEN ISNULL([ReceivedAmount], 0) = 0 AND
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ELSE 0 END, [AmountDue] = - [AmountDue], [ID] = [il].[LoanID]
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= [ii].[ID] JOIN
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IS NOT NULL AND [StatusCode] = 'BILL' AND [sis_loan].[SectionTypeCode] = 'LOAN_INT_PIK') isis_loan ON
[il].[ID] = [isis_loan].[INV_LoanID] JOIN
(SELECT [iffa].[SectionID],
[AccrualDeterminationDateMax] = MAX([iffa].[AccrualDeterminationDate]),
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[ReceivedAmount] = SUM([ReceivedInterestAmount])
FROM
[dbo].[INV_LoanPIKInterestAccrual] iffa
GROUP BY [iffa].[SectionID])
dates ON [isis_loan].[ID] = [dates].[SectionID] LEFT JOIN
(SELECT [AmountDue]
= [UnpaidInterestAmount], [SectionID], [AccrualDeterminationDate]
FROM
[dbo].[INV_LoanPIKInterestAccrual]) unpaid ON [dates].[SectionID] = [unpaid].[SectionID] AND
[dates].[AccrualDeterminationDateMax] = [unpaid].[AccrualDeterminationDate]
LEFT JOIN
(SELECT [PastDueAmount]
= SUM([PastDueInterestAmount]), [SectionID]
FROM
[dbo].[INV_LoanPIKInterestAccrual]
GROUP BY [SectionID]) pastdue
ON [dates].[SectionID] = [pastdue].[SectionID]

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By trawling the approprite forum
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\ BW3.5 : Busness content ==>Need to find the source cube from an web item
Posted: Nov 2, 2005 10:00 PM Reply E-mail this post
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