Java-JDeveloper

Question

how can I open a code page in JDeveloper? What is the first open-application or project?

Answer 1

Oracle has lots of documentation about JDeveloper.
Assuming you have the newest version of JDeveloper here is a guide that helps you get started with a new project in JDeveloper:
http://docs.oracle.com/cd/E53569_01/tutorials/tut_ide/tut_ide.html

Answer 2

thanks for your answer and document @ChessMaster 😊