Hello,
please read the following SAP note regarding supported Java version:
1097311 - SAP MaxDB Database Studio Installation
This requires a Java Runtime Environment (JRE) with Version 5.
Ensure that you have installed the Java runtime environment (32-bit/64-bit) that is suitable for your Database Studio. Use the 32-bit Java runtime environment only if you use Database Studio in the 32-bit variant.
Best Regards,
Valerio