Is there any way to autoresize a JTabbedPane to the same size that the JFrame has?
I'm using netbeans to create the swing interface and I can't figure out whether this is a property that I can set through the GUI designer or if I have to do it programmatically. If I need to do it programatically, netbeans doesn't allow users to modify the auto generated UI code.
Thanks a lot in advance
The Visual Guide to Layout Managers should be useful for understanding how components are arranged in container.
For your task I would use BorderLayout and placed the JTabbedPane into it's center area.
For example:
frame.getContentPane().setLayout(new BorderLayout());
frame.getContentPane().add(pane, BorderLayout.CENTER);
In netbeans you just change your frame layout to BorderLayout and after that in properties for the JTabbedPane set layout constraint CENTER
Related
I am trying to make this layout in Java swing. It is a 3x3 grid layout in the middle, with an upper panel and a lower panel on the bottom.
By default a JFrame uses a BorderLayout. You can take advantage of the BorderLayout with code like:
frame.add(topPanel. BorderLayout.PAGE_START);
frame.add(gridPanel, BorderLayout.CENTER);
frame.add(bottomPanel, BorderLayout.PAGE_END);
Read the section from the Swing tutorial on Using Layout Managers for more information and working examples.
Keep a link to the tutorial handy for Swing Basics.
I am developing a Java Swing application with Net-Beans. the application has a JFrame with tabbed panes. Now the problem is that when the frame is maximized, the tabbed pane only covers half the page and does not re-size to fit the new size of the frame.
Is there a way in Net-Beans to make the tabbed panes re-size with the enlargements of the JFrame, or does it have to be done programmatically.
If it has to be done programmatically, how would I go about it?
The sounds like a layout manager issue
Try setting the layout of the frame to BorderLayout before you add the JTabbedPane
How can I position a JButton under a JTable? What kind of layouts? How? I have a JTable table what is scrollable, and the table is in a frame.
There are many layouts to fulfill this need.
The simplest is using BorderLayout:
JFrame frame = new JFrame();
Container contentPane = frame.getContentPane();
contentPane.setLayout(new BorderLayout());
contentPane.add(new JScrollPane(jtable), BorderLayout.CENTER);
contentPane.add(button, BorderLayout.SOUTH);
If you want this button to be not resized just add JPanel to contentPane. This JPanel should contain your button centered using almost any layout.
If you would like to use more sophisticated layout - the best in my opinion is MigLayout
To correct LoveToCode's well-meaning but misleading advice, you would never want to give a JTable itself a layout. The solution to your problem is not to set the JTable's layout but to set the layout for the JPanel that holds both the JTable's JScrollPane and the JButton. Likely a BorderLayout would work best with the JScrollPane being placed BorderLayout.CENTER and the JPanel that holds the JButton BorderLayout.SOUTH.
Note, if you're adding these components to the JFrame, then know that its contentPane already uses BorderLayout (the tutorials will tell you this -- please read them). So just add these guys to the contentPane as described above.
If hard coding of swing and awt is not mandatory, try using the WindowsBuilder Pro, a Free tool now from google, install its plugin in to eclipse, then Use
GroupLayout - Introduced by NetBeans team in 2005 integrated in WindowsBuilder Pro, is one of the most convenient way create a good gui in less time in Java.
It seems that you can set the layout of a jtable the same way in which you can set the layout of a jframe or a jpane:
table.setLayout(new grideLayout(4, 3)
would give it a grid layout with 4 rows and 3 columns.
the scrollable feature allows you to 'scroll' through your table with the moving bar. It may be a default feature, or it may be that you must use it, try seeing what methods your table gives you.
Lastly, your table should be in a frame, so that you can view it on your window, make you class extend JFrame and it will automatically be a frame upon which you can simply add a table!
I added child panel to parent panel by using method 'parent.addTab(child)' and added one JLabel in the child panel but setBounds method is not working in child panel. This JLabel is getting showed at one fix location. setBounds is working fine in parent panel. What to do?
You need to define an appropriate layout manager for your child panel. For example, if you chose to use BorderLayout you could arrange for the label to be shown in the center of the panel as follows:
JTabbedPane parent = new JTabbedPane();
JPanel child = new JPanel(new BorderLayout());
// Create label with centrally aligned text (default is left).
JLabel label = new JLabel("Hello, World", JLabel.CENTER_ALIGNMENT);
// Add label to center of the child panel.
child.add(label, BorderLayout.CENTER);
// Add child panel as a tab within parent JTabbedPane.
// The child panel will expand to fit the size of the tab.
parent.addTab("My Tab", child);
For more a flexible layout consider using GridBagLayout.
setBounds only work for containers that have their layout set to null. (Or for moving frames around on the desktop.)
JPanel's default layout manager is FlowLayout which lays out components in order horizontally, and dropping to a new row when the current is full (like text in a page).
Using a null layout and setBounds isn't a recommended way to lay out GUIs - it's very fragile - too much depends on the size of the container / frame and the size, resolution and font settings of the desktop can easily break the layout.
Read through the Using Layout Managers section of the Swing tutorial to figure out what layout managers can help you accomplish what you want.
How can I specify the location on JFrame that a component (JLabel specifically) is placed? I created a JFrame object and added a JLabel and a JList to the frame but both objects are being placed on top of each other. I have tried using
label.setBounds(10,10,10,10);
list.setBounds(20,20,100,100);
and
label.setLocation(10,10);
list.setLocation(10, 50);
Neither of these are working. Any help is appreciated! Thanks.
In Java, layout managers are used which determine the way the components will be placed. You can find more information about layout managers here: http://java.sun.com/docs/books/tutorial/uiswing/layout/using.html
If you definitely want to use coordinates to put your components, you could try:
JFrame frame = new JFrame();
frame.setLayout(null);
Otherwise, a very good GUI editor for Java is NetBeans which is using the GroupLayout by default.
Layout Managers will do that for you.
With the default Layout BorderLayout, try
setLayout(new BorderLayout());
getContentPane().add(yourLabel, BorderLayout.NORTH);
getContentPane().add(yourList, BorderLayout.CENTER);