How can I get the input for an editable JComboBox. When user gives an input to the combo how I can get the input text from it?
You need to get the edited text from the combobox editor via combo.getEditor().getItem().
If you need the text that is selected on a JComboBox and you are sure it's a String and not any other object, just use something like String text = (String)myCombobox.getSelectedItem().
If the thing you have in your Model is other than a String, then you need to cast it to the appropriate class, and then use the toString() method of that object.
If you need more help, you should paste a bit of your code, at least declaration and inicialization of your JComboBox...
Just have a look at the oracle tutorial. They do explain how to handle the common swing components http://docs.oracle.com/javase/tutorial/uiswing/components/combobox.html
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In NetBeans I've created a project with many of JTextField's. Now I understand that I should validate it. Is it possible to "cast" text fields to JFormattedTextField's?
It is possible to "cast" text fields to JFormattedTextField's?
No it's not. At least not directly. The other way around is possible though, given JFormattedTextField extends from JTextField.
So I must delete all JTexFields and add Formatted fields ?
Not necessarily but it's highly recommended. On the other hand you can let the class' variables declared as JTextField and initialize them as JFormattedTextField through custom code:
Then you can "safely" downcast them as JFormattedTextField later. However I'd like to emphasize one more time that it sounds like a dirty workaround. Also note you won't be able to change the setText(...) code to setValue(...) which is preferred for formatted text fields.
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 want to change the certain texts written on a JTextPane dynamically. I have a String array containing the words which should be changed
String ListMethod [] = {"forward", "backward", "left", "right"};
I've gone through some posts and many suggest to use JTextPane or JEditorPane to edit text but most of the answers given work on static text. I want to do it in a way such that as I type "forward" or "backward", etc... in the textpane, it detects this words and changes the color. How can I go about it?
Thanks for your help.
See here how to implement a DocumentListener Value Change Listener to JTextField. The have a look at javax.swing.text.Highlighter and javax.swing.text.HighlightPainter.
You have to capture the appropriate event and perform actions. For example in your case you can create an ActionListener that changes color and use registerKeyBoardAction to attach it on your JTextPane.
Oracle has a good tutorial: http://docs.oracle.com/javase/tutorial/uiswing/events/index.html on event listeners. I suggest you start getting yourself familiar there
I want to display multiple-line text for each item in combobox. Words should go to the next line automatically if the exceed the width of combobox. How to achieve this?
String meanings;// array which contains pretty long sentences
JComboBox<String> meaningsComboBox=new JComboBox<String>(meanings);
Maybe wrapping each value into html will help you(this trick work with JLabels), example here.
In another way, I think, you need make custom renderrer, example here
is their any way to set text for a combo box, which is not an element of the combobox.
cboSubjects=new JComboBox();
cbo.addItem("Maths"); // and few more subjects are added
cbo.setSelectedItem("subjects"); // this does not set the default text of combobox
Is their any way to solve this problem ? I need something which works like combobox.text
property of combobox in visual basic
I am working on school management system. I need help.
I'd like to show you a possible alternative :)
Note, you need to call label.setDisplayedMnemonic('s'); and label.setLabelFor(combo) to complete the effect!
You can make jComboBox editable, cbo.setEditable(true);, and after that set the text you want: cbo.setSelectedItem("subjects");