Jasper requires at least Java 2 to run. Except under Windows the full development kit, not just the JRE, is needed. Jasper does not work with Visual J++ or Visual Café. Unless indicated otherwise, you can download the JDK from http://java.sun.com.
Except where indicated, Jasper is supported for Java 1.5 or later.
For some platforms, Jasper is only supported under the following conditions:
Note that Java 1.6 is not available in a 32-bit version on all versions of Mac OS X.