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Java Forum / First Aid / February 2006Java Compilation Problem
Because of a problem, I had to format my hard drive, and reinstall MS XP. I downloaded j2sdk-1_4_2_10-windows-i586-p, and tried to compile my java program. I got the following: C:\j2sdk1.4.2_10\bin>javac ira.java Error occurred during initialization of VM java/lang/NoClassDefFoundError: java/lang/Object Any suggestions? > Because of a problem, I had to format my hard drive, and reinstall > MS XP. I downloaded j2sdk-1_4_2_10-windows-i586-p, and tried to [quoted text clipped - 5 lines] > > Any suggestions? What's your classpath?  Signaturemonique Ask smart questions, get good answers: http://www.catb.org/~esr/faqs/smart-questions.html >C:\j2sdk1.4.2_10\bin>javac ira.java >Error occurred during initialization of VM >java/lang/NoClassDefFoundError: java/lang/Object that's an odd one. NoClassDefFoundError is normally a run time problem. javac is having trouble finding its classes. I suspect it is because you have two different JDKs installed and somehow it is getting parts of the old one mixed in with the new. I suggest uninstalling all JDKs, cleaning the registry, getting rid of java.exes anywhere and starting over. See http://mindprod.com/jgloss/jdk.html#TESTING for details. http://mindprod.com/projects/jvmmanager.html we need a sanity checker and restorer for Java if it is to be successful with the general public. See http://mindprod.com/projects.html#SANITYCHECKER SignatureCanadian Mind Products, Roedy Green. http://mindprod.com Java custom programming, consulting and coaching. I went to add/remove programs, and the only java I found was the one I was running. Note: when I did my compilation, I put my .java file in the same directory as the javac command, so for my first test I wouldn't have any path issues. > >C:\j2sdk1.4.2_10\bin>javac ira.java > >Error occurred during initialization of VM [quoted text clipped - 18 lines] > Canadian Mind Products, Roedy Green. > http://mindprod.com Java custom programming, consulting and coaching. "jerry" wrote... > "Roedy Green" wrote... >> [quoted text clipped - 10 lines] >> >> See http://mindprod.com/jgloss/jdk.html#TESTING for details. I would rather believe that the single instance of the jdk is corrupt, as the OP has reformatted the harddrive and made a clean install. > I went to add/remove programs, and the only java I found was the one I was > running. Note: when I did my compilation, I put my .java file in the same > directory as the javac command, so for my first test I wouldn't have any > path issues. The class libraries are located elsewhere, so it could still be some sort of classpath problem. However, as it occurs already at initialization of the VM, that infers that the registry settings for Java are corrupt, or that the class libraries not are present. In any case, that would make me believe that the installation of the JDK has been interrupted somehow, and it needs to be completely reinstalled. // Bjorn A On 7 Feb 2006 11:48:50 +0100, "Bjorn Abelli" <bjorn_abelli@DoNotSpam.hotmail.com> wrote, quoted or indirectly quoted someone who said : >The class libraries are located elsewhere, so it could still be some sort of >classpath problem. Javac gets its own class files without using the classpath. The error message sounded like it was having trouble finding its OWN classes, not the programmer's. Things have to be pretty screwed up for that to happen. SignatureCanadian Mind Products, Roedy Green. http://mindprod.com Java custom programming, consulting and coaching. "Roedy Green" wrote... >> The class libraries are located elsewhere, so it could still be some >> sort of classpath problem. [quoted text clipped - 3 lines] > not the programmer's. Things have to be pretty screwed up for that to > happen. And that is what I said, that Java can't find the path to the classes, hence a possible "classpath" problem. The OP was wondering why it didn't work despite the fact that he ran it from the bin-directory. I agree that I could have been more specific in writing out what I meant with "sort of" classpath problem, as I *didn't* mean the environment variable "CLASSPATH" or the switch -classpath, but just that; the path to the classes. Out of courtesy, you should have included the part of my answer that it most likely means that the JDK-installation is corrupt. // Bjorn A On 7 Feb 2006 13:34:21 +0100, "Bjorn Abelli" <bjorn_abelli@DoNotSpam.hotmail.com> wrote, quoted or indirectly quoted someone who said : >Out of courtesy, you should have included the part of my answer that it most >likely means that the JDK-installation is corrupt. Sorry no, I won't. I only include enough of a previous post to let mine make sense, just it indicate the general topic, not to recapitulate. I hate it when people quote stuff I have already read and you have to scroll down four pages to read one new line. If people can't remember what was said before, let them get a decent newsreader that lets them look. SignatureCanadian Mind Products, Roedy Green. http://mindprod.com Java custom programming, consulting and coaching. Another comment. I just formatted my hard drive, and reinstalled MS, and java. So I don't so how othere pieces of java would be out there. > >C:\j2sdk1.4.2_10\bin>javac ira.java > >Error occurred during initialization of VM [quoted text clipped - 18 lines] > Canadian Mind Products, Roedy Green. > http://mindprod.com Java custom programming, consulting and coaching. >Another comment. I just formatted my hard drive, and reinstalled MS, and >java. So I don't so how othere pieces of java would be out there. check your registry for sanity. See http://mindprod.com/jgloss/registry.html for what it should look like. You might also have a stray old copy of java.exe screwing things up. SignatureCanadian Mind Products, Roedy Green. http://mindprod.com Java custom programming, consulting and coaching. > Because of a problem, I had to format my hard drive, and reinstall MS XP. I > downloaded j2sdk-1_4_2_10-windows-i586-p, and tried to compile my java [quoted text clipped - 5 lines] > > Any suggestions? Uninstall/Reinstall the jvm. It's hosed. 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