Compiling java pages in 12.2.9

User_FLBKS Member, Orion GCS Customer Posts: 2 Green Ribbon

We are upgrading from 12.1.3 and 12.2.9. The java pages are not opening. Is there a guide on how to move java pages to correct path and compile the ja?va files is it recommended compile pages in jdeveloper or should it be compiled outside jdeveloper?