2002 JI Open Discussion Posted August 30, 2006 Share Posted August 30, 2006 By: Eric Tam - hy_tam Exception UnsupportedClassVersionError Thrown 2005-02-06 18:56i am a beginner of using iReport, when i start the iReport with iReport.bat, i've got an exception UnsupportedClassVersionError thrown, following is the screen dump Exception in thread "main" java.lang.UnsupportedClassVersionError: it/businesslo gic/ireport/gui/MainFrame (Unsupported major.minor version 48.0) at java.lang.ClassLoader.defineClass0(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:488) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:10 6) at java.net.URLClassLoader.defineClass(URLClassLoader.java:243) at java.net.URLClassLoader.access$100(URLClassLoader.java:51) at java.net.URLClassLoader$1.run(URLClassLoader.java:190) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:183) at java.lang.ClassLoader.loadClass(ClassLoader.java:294) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:281) at java.lang.ClassLoader.loadClass(ClassLoader.java:250) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:310) Do anybody have idea of this problem? jdk version: 1.3.1_07 iReport version: 0.4.1 Many Thanks, eric By: Jte - jte_rem RE: Exception UnsupportedClassVersionError Thrown 2005-03-03 08:09yes the problem here is that the version of JasperReports that you are using is not compatible with the JDK version that you are working from. You may need to download an older version of JasperReports to solve the problem. Or else upgrade to a new version of the JDK By: Kees Kuip - keeskuip Link to comment Share on other sites More sharing options...
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