I am developing a Java GUI form using JFrame including many text boxes in it.
Now to save value of these text boxes i need to take all the value from text boxes separately, and then have to bind it with object using its class constructor..
But instead of this i want to automatically bind all text boxes value into class object so i can simply get the object which has all text box's value already bound..
Pleas help me if is there any framework or any other day to do the same..
Thanks in advance
Related
I am making java application for my semster project for which I have to implement mvc. I have completed my all views using jpanels. In one panel I have created a form which contains multiple jtextfields. Now i want to pass the values of all those textfields to controller class. what is the best way of doing it?
One way of doing it, that I have figured out is to create getfunction and and save the value of those textfields in array string and return that string from the getfunction. But the probem is that this method wil work for only particular data type. If I have to store the values of some textfields as string and some as integer then the problem will occur.
I've seen the question answered in How do I create a right click context menu in Java Swing?
and seen how I can create a menu.
However, when I associate it with the text area, it doesn't matter if it has anything written on it or not, it always shows the menu.
I use the text area to reveal how many objects I have created from a specific class (which I save in a ArrayList). What I need, is a menu that when clicking on a specific line of text, it can have the index of the object in the ArrayList and use that menu to Edit/Remove that specified object from the ArrayList.
Is that possible with a Text Area or should I use a different type of displaying component?
As an Example:
Text Area:
Object 1.
Object 2.
Object 3.
When I select , for example, Object 1 with a right click, it shows the menu with Edit and Remove. But when I dont select any of them, the menu does not show.
And when it Shows, it can access the index od the object (object 1 -> index 0, object 2 -> index 1 , etc.)
Thanks a lot for your help,
Nhekas
I use the text area to reveal how many objects I have created from a specific class
Don't use a JTextArea.
Instead I would suggest you should be using a JList. Read the section from the Swing tutorial on How to Use Lists for more information and examples.
The JList has a locationToIndex(...) method which will give you the row where the mouse was clicked. Then you can get the object from the list.
I am reading in information from an xml file where i have no idea how much information is there until i read it in. I dynamically create Jtextfields and can get the information to appear on them. I am trying to add a documentlistener to those text fields so that a user can change the data and it will automatically update the xml file every time a number is changed. The problem is that there is no reference to the JTextField to get the text from and it is causing a compiler error. Is there a way to do this?
Use a factory style setup.
Basically, create a method or class that will create a JTextField. Pass it the reference to the node that it will be responsible for.
Create the text field and register the DocumentListener to it...although, I'd be wary about using a DocumentListener personally, maybe a ActionListener and/or FocusListener might be more suitable, but hay.
I've been trying to freshen up on my Java knowledge and I've been building a small GUI program and I've been running into a bit of a problem.
Basically, I have a JList which I'm currently populating with strings from an object from one of my classes which implement AbstractListModel which we can call my ItemList class. It contains an ArrayList of objects of the type Item which implements Serializable.
But, what I'd like to do is rather than populate my JList with a bunch of strings I'd like to populate it with some kind of string + JTextField combination so I can see one property of each Item object while also being able to update another property by changing the JTextField.
Now, what I'm looking for is the simplest possible way of doing this, and I am assuming there is a (relatively) simple way to do this since it's such a common thing to want to do in a GUI application (although I wouldn't put it past Java and Swing to make it convoluted and complicated).
So, what is the correct way of doing this?
No need to ever use String objects. Instead:
Put Item objects in the JList.
Add a ListCellRenderer to the list, to show the Item object the most user friendly way.
When the user selects an item, show the details in a different place (I'm thinking a panel with 2 columns of labels and text fields, and two rows - one for each attribute, and perhaps a button to Save)
The edit controls would best be encapsulated in a panel that can then hidden when not required, & put in a variety of places, e.g.
Below the list
In the main part of the GUI
displayed in a JOptionPane or a (modal or not) JDialog
Here is an example of placing the 'view/edit panel' (the file details) below the selection component (the table).
On Netbeans, I have a jDialog with a jComboBox populated from values coming from a Java Enumeration. I need the default value of the Combo Box to be blank at start (or null or whatever), this way forcing the user to choose for a valid option. I have "selectedIndex" set to -1 but still the default value is my first enumeration value. So how can I have my Combo Box load with no value selected?
Thank you very much for your help.
Cheers.
You need to remove and re-add the ItemListener as suggested in this answer to a similar question.