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Change and delete rows in a sql-database

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Note, some of the code could be hard to understand as a bit is in Swedish.


I am trying to learn some sql/java. I created some tables in an sql-database, and a java-program to access and modify the tables. I am not that experienced in programming so I might have made some mistakes and I don't always know all the terminology. Anyway, here goes.

I made a GUI where you can switch from different tables using a scrollpane. I also have buttons and textfields for navigation and user input. I manged to find out how to change from different tables and how to add rows of data. I also ahve classes to run the program and classes to access to the database, and some methods in them,

This is how i show the table called Movies:

This is how I add rows to tables:

It seems a bit more complicated to delete rows and to change data in them. Mainly I am not sure how I should make the program understand which row that I want to change or delete. If it is possible to select a row in the scrollpane or somehow search in an array after the movie or staff that I want to change, I make the input using Textforms.

Any help would be great.


Complete code:

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Since this is more SQL related than Swing related, I'm moving this to JDBC.
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What happens when you try to delete a row from the command line? What SQL instructions do you use?
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