Netbeans/C2/Adding-a-File-Chooser/English-timed

Time	Narration
00:00	Hello.
00:01	Welcome to the tutorial on Adding a File Chooser to a Java Application.
00:07	In this tutorial, we will:
00:09	* Create the application
00:10	* Create the application form.
00:12	* Add the File Chooser
00:14	* Configure the File Chooser. and
00:17	* run the application.
00:19	For this demonstration, I am using Linux Operating System, Ubuntu v12.04
00:26	and Netbeans IDE v7.1.1.
00:31	In this tutorial, we will learn to add a File chooser to a Java Application using the javax.swing.JFileChooser component.
00:42	As a part of this exercise, we will learn to create a small Java application that loads a '.txt' file into a Text Area.
00:52	Let us first create the Java Application:
00:55	Launch the IDE.
00:57	From the main menu, choose File and New Project.
01:03	Choose the Java category and the Java Application project type.
01:08	And click Next.
01:10	In the Project Name field, let's type: "JFileChooserDemo".
01:20	Clear the Create Main Class check-box.
01:23	Make sure that the Set as Main Project check-box is selected.
01:27	Click Finish.
01:31	Here, we will create the JFrame container and add a few components to it.
01:37	Right-click on the Source Packages node.
01:41	Choose New > Other
01:45	Choose the Swing GUI Forms categories and the JFrameForm type.
01:51	Click Next.
01:54	For Class Name, type: "JFileChooserDemo".
02:02	In the Package field, type: "jfilechooserdemo.resources".
02:12	Click Finish.
02:17	In the Properties window, select the Title property.
02:22	And type: "Demo Application".
02:30	Press Enter to confirm.
02:32	In the Palette, open the Swing Menus category.
02:40	Select the Menu Bar component and drag it to the top left corner of the Jframe.
02:50	Right-click the Edit item of the Menu Bar component.
02:55	Select Delete in the context menu.
02:59	Next, let us add a menu item that allows to open the FileChooser from the running application.
03:07	Make sure the Menu Bar' is selected before you drag another Menu Item here.
03:14	In the Swing Menus category in the Palette, select a new Menu Item.
03:22	Drag it to the Menu Bar and drop it onto the File item of the Menu Bar.
03:30	Right-click jMenuItem1 in the Design view.
03:35	And choose Change Variable Name from the context menu.
03:41	Rename the item to Open and click OK.
03:48	Make sure that the jMenuItem1 is still selected in the Design view.
03:53	Press the Space bar to edit the text of the component.
03:58	Change the text to Open and press Enter to confirm.
04:04	Specify the action handler for the Open menu item.
04:08	Right-click the menu item Open and choose Events, Action, Action Performed from the context menu.
04:20	The GUI builder automatically switches to the source view.
04:25	A new event handler method OpenActionPerformed() is generated.
04:31	Let us switch back to the Design view.
04:35	Let's add a menu item to exit the File Chooser.
04:39	In the Palette , choose Swing Menus category.
04:45	Select Menu Item
04:48	Drag it to the Menu Bar below the Open menu item on the form.
04:53	Notice the orange highlighting that indicates where the jmenuItem1 is going to be placed.
05:03	Right-click jMenuItem1 in the Design view.
05:07	Choose Change Variable Name from the context menu.
05:12	Rename the item to Exit and click on OK.
05:20	Make sure that the jMenuItem1 is still selected in the Design view.
05:25	Press the Space bar to edit the text of the component.
05:30	Change the text to Exit and press Enter to confirm.
05:36	Specify the action handler for the Exit menu item.
05:41	Right-click the menu-item Exit.
05:44	Choose Events, Action, Action Performed() from the context menu.
05:51	The GUI Builder automatically switches to the Source view.
05:56	A new event handler method named ExitActionPerformed() is generated.
06:02	The ExitActionPerformed node appears in the Navigator window above the OpenActionPerformed() node.
06:12	If you cannot view your Navigator,
06:14	go to the Window menu in the menu bar,
06:18	choose Navigating and click on Navigator.
06:25	Here, you can see the ExitActionPerformed node appearing above the OpenActionPerformed node.
06:33	To make the Exit menu-item work,
06:36	let us include the statement System.exit(0); into the ExitActionPerformed() method body.
06:47	Switch back to Design mode.
06:50	From the Swing Controls category of the Palette , drag a Text Area onto the form.
07:06	Resize the added component to make room for the text, displayed by the File Chooser later.
07:18	Rename the variable as "textarea".
07:26	Let us next add the actual File Chooser.
07:31	If your Navigator window is not open, choose Window, Navigating, a Navigator to open it.
07:38	And in the Navigator, right-click the Jframe node.
07:44	Choose Add From Palette, Swing Windows and File Chooser from the context menu.
07:54	You can notice in the Navigator that a JFileChooser was added to the form.
08:01	Right-click the JFileChooser node and rename the variable to fileChooser.
08:16	Click OK.
08:19	We have now added the File Chooser.
08:21	The next step is to configure the File Chooser to display the title that you want.
08:27	We will also add a custom file filter and integrate the File Chooser into your application.
08:34	Click to select the JfileChooser in the Navigator window.
08:38	Now, let's edit its properties in the Properties dialog-box.
08:43	In the Properties window below the Palette,
08:47	change the dialogTitle to "This is my open dialog".
09:00	Press Enter to confirm.
09:03	Now, switch to the Source mode.
09:07	Now, to integrate the FileChooser into your application
09:12	I have an existing code snippet which I will copy and paste into the existing OpenActionPerformed() method.
09:20	This example reads the file contents and displays them in the Text Area.
09:27	We will now call the FileChooser's getSelectedFile() method to determine which file the user has clicked.
09:36	I will copy this code onto my clipboard and in the Source view of the IDE, paste it inside the OpenActionPerformed method.
09:51	If the editor reports errors in your code, right-click anywhere in the code and select Fix Imports.
10:00	Now, let us add a custom file filter that makes the File Chooser display only '.txt' files.
10:09	Switch to the Design mode and select the fileChooser in the Navigator window.
10:16	In the Properties window, click the ellipsis button, next to the fileFilter property.
10:25	In the fileFilter dialog-box, select Custom Code from the combo-box..
10:31	Type new MyCustomFilter() in the text field
10:41	and click OK.
10:44	To make the custom code work, we will write the MyCustomFilter class.
10:52	This inner or outer class will extend the fileFilter class.
10:57	I will copy and paste this code snippet
11:04	into the source of our class, below the import statements.
11:11	This inner or outer class will extend the fileFilter class.
11:20	Right-click the JFileChooserDemo project in the Project window and select Run to start the sample project.
11:31	In the Run Project dialog-box, select the jfilechooserdemo.resources.JFileChooserDemo main class.
11:41	Click OK.
11:47	In the running Demo Application, choose Open in the File menu to trigger the action.
11:55	Open any text file to display its contents in the text area.
12:00	Let me select the Sample.txt file and choose Open.
12:06	The fileChooser displays the contents of the text file.
12:10	To close the application, select Exit in the File Menu.
12:17	In this tutorial, you learnt to:
12:19	* Add a File chooser to a Java application and
12:23	* Configure the File chooser.
12:27	As an assignment- use the same demo project we have created and add the following features:
12:35	Add a Save menu item under the menu bar.
12:38	Add keyboard short-cuts for all the menu items.
12:42	Add a code snippet to the Save action, to save the file.
12:51	I have already created a similar assignment where the file chooser displays the Save option under the File menu
13:01	and gives you the option to save the text file which you open.
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13:59	This tutorial has been contributed by IT for Change.
14:04	Thank you for joining us.

Contributors and Content Editors

PoojaMoolya, Pratik kamble, Sandhya.np14