adding to database error [closed] - java

Closed. This question is not reproducible or was caused by typos. It is not currently accepting answers.
This question was caused by a typo or a problem that can no longer be reproduced. While similar questions may be on-topic here, this one was resolved in a way less likely to help future readers.
Closed 8 years ago.
Improve this question
I've create a database and I'm adding records from GUI.
I also created a delete button.
Once I delete a record and try to add a new one it gives me this error
java.sql.SQLException:
Incorrect integervalue:'javax.swing.JTextField[jTextField16,413,390,19x28,layout=javax.swing.plaf.basic.BasicTextUI$UpdateHandler,alignmentX=0.0,alignme'
for column path at row1

Your database is excpecting an integer, it's getting a string instead.
You are probably doing
textField.toString();
instead of
Integer.parseInt(textField.getText());

Related

I am doing an assignment for my Java class and I am having problems I don't understand what I am expected to put in [closed]

Closed. This question needs to be more focused. It is not currently accepting answers.
Want to improve this question? Update the question so it focuses on one problem only by editing this post.
Closed 15 hours ago.
Improve this question
enter image description here
I've tried googling and I have even created a chegg account but I didn't get an explanation or what I was expected to do.
What am I expected to put in the box?
What am I expected to put in the box?

Create 64 Rows And 64 Columns Table Application Using ROOM DATABASE In android Studio [closed]

Closed. This question needs to be more focused. It is not currently accepting answers.
Want to improve this question? Update the question so it focuses on one problem only by editing this post.
Closed 9 days ago.
Improve this question
I want to create an app where i can Store 64 questions and each question will have its own 64 answers.
If i want a particular answer of any one particular question, So there i just type question Number corresponding Answer Number then i can get particular cell data..
Example:-
Question Number 5 Answer Number 7......
Please help me to provide best or efficient way to develop this app....

Unexplainable behavior of a double [closed]

Closed. This question is not reproducible or was caused by typos. It is not currently accepting answers.
This question was caused by a typo or a problem that can no longer be reproduced. While similar questions may be on-topic here, this one was resolved in a way less likely to help future readers.
Closed 8 years ago.
Improve this question
I currently programming some calculations and found a weird issue, which I cannot explain.
I'm doing a calculation which I save in a new double field. The thing is, that the finally saved value is not the same than the solution of the formula. I made a screenshot for better understanding.
When I put the whole calculation in a watch, I get the result "1.3050....."
When i check the double afterwards, it has saved "2.87......." which I have no idea, where that comes from.
Does anybody know, why it is behaving like this? For me thats absolutely unexplainable...
Full size: http://i.stack.imgur.com/8nJpn.png
Math.PI/180 should be Math.PI/180.0, dividing doubles by integers will cause some funny things to happen

Java: Getting exception errors across multiple class files [closed]

Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers.
Closed 8 years ago.
This question was caused by a typo or a problem that can no longer be reproduced. While similar questions may be on-topic here, this one was resolved in a way less likely to help future readers.
This question appears to be off-topic because it lacks sufficient information to diagnose the problem. Describe your problem in more detail or include a minimal example in the question itself.
Improve this question
I am trying to develop a small pizza ordering app. I have 3 classes so far and the purpose of them right now is to display 3 menus with the menu items accessible.
Previously I had only one class and that worked just fine however issues started occurring when I split the program to use several classes.
Main.java:
http://pastebin.com/bZJ7Pgdt
MakeFileMenu.java:
http://pastebin.com/wv2Smm6E
MakeFrame.java:
http://pastebin.com/J7DV294P
The errors I am getting are:
Exception in thread "main" java.lang.NullPointerException
at main.MakeFileMenu.MakeMenu(MakeFileMenu.java:24)
at main.Main.start(Main.java:26)
at main.Main.main(Main.java:16)
Furthermore in the Makeframe.java file lines 37, 42, 49 and 57 should be uncommented. I commented them out as they were giving me errors so I thought I will at least try to get the menus to appear.
Anything you guys see out of the ordinary? I double checked the code I can't seem to figure out what could be wrong with it.
Thanks for your help!
The problem is in line:
frame.frame.setJMenuBar(menuBar);
this is because variable frame in frame (frame.frame) is not initialized. You have to initialize it before using.
You either forgot to call makeFrame on frame in MakeFileMenu or you should rename makeFrame to MakeFrame to make it a constructor.

Java Collection:Collection framework:Less bucket is good to store object in collection or large number of bucket? [closed]

Closed. This question needs to be more focused. It is not currently accepting answers.
Want to improve this question? Update the question so it focuses on one problem only by editing this post.
Closed 9 years ago.
Improve this question
Here i just want to ask one question which i faced in Java interview.
Question was like how hashmap works.I explained and answered all following questions.But i stuck at one question,which was:
Is it better to have more bucket of objects in collection or less bucket?and why? Please help me here with your view
Best HashMap = Unique Ids - one bucket for one object - fastest access to object when you know the key.

Categories