How to modify/add code to the initComponents()
method in Java on NetBeans? When I try to add any line of code this area seems to be like readonly and it\'s high
Yes the initComponents method is read only to keep full control for the IDE. You may add yours in the constructor right after initComponents.
public class NewJFrame extends javax.swing.JFrame {
/** Creates new form NewJFrame */
public NewJFrame() {
initComponents();
myInitComponents();
}
public void myInitComponents() {
}
The initComponents() method is regenerated by the IDE as you create your UI in the GUI editor. The method is 'guarded' to prevent this regeneration from overwriting user written code.
There are a couple of ways to add code to this method, indirectly:
Drop a new component onto the design editor 'canvas' for the window.
Enter code as part of one of the following code properties: Pre-Creation Code, Post-Creation Code, Pre-Init Code, Post-Init Code, Post-Listener Code, Pre-Population Code, Post-Population Code and After-All-Set Code.
There are a couple other code properties that do not alter the initComponents() method... but can be very useful: Pre-Declaration Code and Post-Declaration Code. alt text http://blogs.sun.com/vkraemer/resource/code-properties.png Note: the editor for these properties is not 'rich', so I would recommend creating methods in the "regular editor" that you just call in the initComponents().
You can modify the code in the initComponents() method by positioning or changing the 'regular' properties of the 'base panel' or controls.
select all of the code and copy in an external editor like gedit or notepad.
Then delete your jframe file.
Create a new java class in netbeans in the same package with the same name.
Copy all the contents from the editor file and paste it in your newly created java class.
I discovered by trial and error, that initialization which needs to be done before the user sees the panel should be added as "Pre-Init Code". In my case, I needed to populate a drop down box (called "Choice" in AWT). There seems to be very little detailed documentation available on using Matisse. So, I hope this will help others.
Presumably what you are doing is writing an application using the Matisse GUI tool.
Matisse generates non editable code blocks. This is required by Matisse so that the tool remains synchronized with the code base.
There are a number of options provided by Matisse to allow insertion of custom code before, after or within code blocks such as initComponents()
.
See the image below:
This shows the properties tab for a jPanel and some of the code insertion options.