Java - Storing JMenuItems in an ArrayList

skate_punk_21 · 12-01-2005, 07:31 PM

OK heres the situation,
User enter text into a JOptionPane and dynamically creates a new JMenuItem with given text.

I want each JMenu option to be added to an ArrayList so that the JMenuBar reads through the list and creates the contents of the Bar from that list.

Problem:
I have initialized the arrayList and done all the proper imports. The program DOES compile, but whenever i try to add the JMenuItem to the list, I'm getting a NullPointerException.

Ideas?

Skate

<edit>eventually the idea is to write the necessary text to a file and have the program read from there and create the JMenu that way, but as always, Baby step

</edit>

MoralTerror · 12-02-2005, 11:06 AM

could you post the code please

skate_punk_21 · 12-08-2005, 02:01 PM

hi moralterror & thanks for the reply,
I figured out my problem (for now), in my haste i had defined the arraylist locally in the constructor and forgotten to intialize it.
thanks again,
Skate

12-01-2005, 07:31 PM	#1 (permalink)
skate_punk_21 1337 C0D3R Join Date: Mar 2005 Location: Canada Posts: 1,460 OS: Server 2K3/XP Pro/XP MCE/Win 98/Ubuntu Linux/BackTrack 2 My System	Java - Storing JMenuItems in an ArrayList OK heres the situation, User enter text into a JOptionPane and dynamically creates a new JMenuItem with given text. I want each JMenu option to be added to an ArrayList so that the JMenuBar reads through the list and creates the contents of the Bar from that list. Problem: I have initialized the arrayList and done all the proper imports. The program DOES compile, but whenever i try to add the JMenuItem to the list, I'm getting a NullPointerException. Ideas? *Skate* <edit>eventually the idea is to write the necessary text to a file and have the program read from there and create the JMenu that way, but as always, Baby step </edit> __________________ Have I Helped you? Please Consider a Donation to TechSupportForums Last edited by skate_punk_21; 12-01-2005 at 07:36 PM.

12-08-2005, 02:01 PM	#3 (permalink)
skate_punk_21 1337 C0D3R Join Date: Mar 2005 Location: Canada Posts: 1,460 OS: Server 2K3/XP Pro/XP MCE/Win 98/Ubuntu Linux/BackTrack 2 My System	hi moralterror & thanks for the reply, I figured out my problem (for now), in my haste i had defined the arraylist locally in the constructor and forgotten to intialize it. thanks again, *Skate* __________________ Have I Helped you? Please Consider a Donation to TechSupportForums

12-02-2005, 11:06 AM	#2 (permalink)
MoralTerror Analyst, Security Team Join Date: Nov 2005 Location: UK Posts: 1,968 OS: xp	could you post the code please