?
Solved

rt.jar Version Mismatch

Posted on 2006-07-19
15
Medium Priority
?
695 Views
Last Modified: 2013-11-23
Hi,

I was using jdk 1.4.2. Today I uninstalled it and installed jdk 1.6. Again I uninstalled JDK 1.6 and now I installed jdk1.5 with netbeans.

I am using ant script for building. whenevr i tried to build using ant it is giving an error like this(Previously in jdk 1.4 it same code was working fine.)


C:\san>ant
Buildfile: build.xml

clean:
   [delete] Deleting directory C:\san\classes

init:
    [mkdir] Created dir: C:\san\classes
    [mkdir] Created dir: C:\san\classes\res

comp:
    [javac] Compiling 34 source files to C:\Geneva CRM\classes
    [javac] C:\san\src\gstl\san\Main.java:16: cannot access javax.swing.
JFrame
    [javac] bad class file: C:\jdk1.5.0_07\jre\lib\rt.jar(javax/swing/JFrame.cla
ss)
    [javac] class file has wrong version 49.0, should be 48.0
    [javac] Please remove or make sure it appears in the correct subdirectory of
 the classpath.
    [javac] public class Main extends JFrame implements ActionListener,WindowLis
tener
    [javac]                           ^
    [javac] 1 error

BUILD FAILED
C:\san\build.xml:32: Compile failed; see the compiler error output for de
tails.

Total time: 2 seconds

I am not getting what the error is. Can any body help me as soon as possible. I am doing an important project work now.
0
Comment
Question by:sree032397
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 4
  • 3
  • 3
  • +3
15 Comments
 
LVL 35

Expert Comment

by:girionis
ID: 17136988
Check your JaAVA_HOME and if you still have jdk1.4. 48 means jdk1.4 while 49 means 1.5. for some reason it is still looking to jdk1.4
0
 
LVL 1

Author Comment

by:sree032397
ID: 17137008
Yes I have checked for that. My JAVA_HOME refers to jdk 1.5
0
 
LVL 35

Expert Comment

by:girionis
ID: 17137024
ok can you do a java -version and see what it returns?
0
Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 
LVL 86

Expert Comment

by:CEHJ
ID: 17137032
Put

%JAVA_HOME%\bin

as the first entry in your PATH variable
0
 
LVL 1

Author Comment

by:sree032397
ID: 17137054
java -version returns 1.5
0
 
LVL 86

Expert Comment

by:CEHJ
ID: 17137098
What does

javac

print?
0
 
LVL 86

Expert Comment

by:CEHJ
ID: 17137106
And just for the record, what does

echo %JAVA_HOME%

print?
0
 
LVL 1

Author Comment

by:sree032397
ID: 17137110
Both java and javac are refering to jdk 1.5
0
 
LVL 92

Expert Comment

by:objects
ID: 17137129
sounds like you may not have uninstalled them. have you checked that they were removed completely?
0
 
LVL 35

Expert Comment

by:girionis
ID: 17137131
Somehow Ant tries to find 1.4 libs. Which version os Ant are you using? Do you have the one coming with NetBeans?
0
 
LVL 86

Expert Comment

by:CEHJ
ID: 17137150
Try

ant -Dbuild.compiler=javac1.5
0
 
LVL 12

Accepted Solution

by:
enachemc earned 2000 total points
ID: 17137342
Just delete all java.exe and javaw.exe from your windows directory (and subdirectories).
0
 
LVL 30

Expert Comment

by:Mayank S
ID: 17137903
>> Just delete all java.exe and javaw.exe from your windows directory (and subdirectories).

Might not solve the problem. Have you tried CEHJ's (%JAVA_HOME%\bin at the start of PATH).
0
 
LVL 30

Expert Comment

by:Mayank S
ID: 17138658
Just for the sake of completeness - also check the current version in your Windows registry HKEY_LOCAL_MACHINE\SOFTWARE\JavaSoft\Java Runtime Environment
0
 
LVL 30

Expert Comment

by:Mayank S
ID: 17200316
Sledge-hammer solution :) you still need to learn how to manage different JREs installed on your machine. Deleting the others is not the right way of learning this.
0

Featured Post

What does it mean to be "Always On"?

Is your cloud always on? With an Always On cloud you won't have to worry about downtime for maintenance or software application code updates, ensuring that your bottom line isn't affected.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

For beginner Java programmers or at least those new to the Eclipse IDE, the following tutorial will show some (four) ways in which you can import your Java projects to your Eclipse workbench. Introduction While learning Java can be done with…
Introduction This article is the first of three articles that explain why and how the Experts Exchange QA Team does test automation for our web site. This article explains our test automation goals. Then rationale is given for the tools we use to a…
The viewer will learn how to implement Singleton Design Pattern in Java.
How to fix incompatible JVM issue while installing Eclipse While installing Eclipse in windows, got one error like above and unable to proceed with the installation. This video describes how to successfully install Eclipse. How to solve incompa…
Suggested Courses
Course of the Month9 days, 9 hours left to enroll

762 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question