I follow this tutorial http://www.vogella.com/articles/JavaPersistenceAPI/article.html and I and did section 4 ,I run the main program and I saw in console that the entries created,my qustion is how can I see the table that created and the entries inside of it ,where can I find it ?
Could be that Derby stores its data not in plain text but in something other. Can't help this way. You should look for the way to connect to Derby database with some Viewer application and open that table. Read this thread: Is there a tool other than ij to look into a local derby database (folder)?