problems with jasperreports-3.0.0 and jdk 1.3.1_11

[marito]

Hi

in which jdk version should be run jasperreport 1.3.???

I have a project that uses jasperreports-3.0.0 to show a file in .pdf format. The aplication server is SAP_J2EEngine6.20 and the jdk version is 1.3.1_11

when i run the class that use jassperreport it shows the next message:

java.lang.UnsupportedClassVersionError: net/sf/jasperreports/engine/JRDataSource (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(Secure ClassLoader.java:106)
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)
....

So when I runs it in jdk version is 1.6. it runs ok, but I need to work with jdk version 1.3.1_11, because in SAP_J2EEngine6.20, Versions different to the 1.3.1 are not supported, regardless of the OS and JVM Vendor.

please can somebody help me.

thanks!

[r035198x]

You'd probably have to use an older version of jasperreports then.
P.S Even 1.4 is now considered old and has reached its eol.