I want to add a JTable into a JScrollPane, but the tableheader is not showing. Could anybody can help me figure out this?
JScrollPane tablePane = new JScrollPane();
tablePane.setViewportView(table);
tablePane.setRowHeaderView(table);
tablePane.setPreferredSize(new Dimension(950, 450));
this.setPreferredSize(new Dimension(1100, 500));
this.setLayout(new BorderLayout());
this.add(BorderLayout.CENTER, tablePane);
Below code should help.
JScrollPane tablePane = new JScrollPane(table);
//tablePane.setViewportView(table);
//tablePane.setRowHeaderView(table);
Seems you want to make the JTable scrollable. When you look into the documentation of JTable, you'll notice that JTable is already scrollable. So you don't need to add a JTable to a JScrollPane.
Also you should not add the JTable as ViewportView and as RowHeaderView of the JScrollPane simultaneously. The RowHeaderView of JScrollPane does not just take the RowHeaderView of the JTable. Instead you'll get two JTables side by side.
To fix this just set the viewportView of the JScrollPane or leave the JScrollPane completly out and use the JTable as standalone container.
Related
I have a problem with scroling JPanel,
I have a lot of labels and fields which are generated dynamicly, but my frame can't show it all.
My code:
JPanel showPanel = new JPanel();
JScrollPane scrollPane = new JScrollPane(showPanel);
add(scrollPane);
scrollPane.setBounds(0, 0, 400, 400);
scrollPane.setVisible(true);
scrollPane.add(Jbuttons);
And Im adding a lot of these buttons but my scrollPane won't show it.
I don't have any scrollBar, with text area I didn't have any problems.
Do you have any idea?
scrollPane.setBounds(0, 0, 400, 400); looks like you're using a null layout, don't this
scrollPane.add(Jbuttons); isn't how you should be adding content to the scroll pane, instead, add it to the showPanel which is already inside the JScrollPane. JScrollPane contains a single component, the JViewport, you can not "add" components to the JScrollPane, you must set the JViewports view to what you want shown and the manipulate this view
Take a look at How to Use Scroll Panes for more details
I'm attempting to add a JTable with NetBeans GUI builder. The table is inside a panel which already has a scroll bar. Netbeans automatically creates all JTables inside of a JScrollPane.
However, I want the table to scroll as part of a larger page. I do not need two scroll bars.
My problem is: if I get rid of the scroll pane, I lose the header.
Is there a way to have a table with a header inside the Netbeans GUI builder?
My problem is: if I get rid of the scroll pane, I lose the header.
JTableHeader is (automatically) visible in the case that JTable is inside JScrollPane
you have to get JTableHeader from JTable and place this Object programatically by using LayoutManager to the container, I'm strongly recommend to use BorderLayout or GridBagLayout for this container
If you add JTabel directly to container(not to JScrollPane) you need to add JTableHeader by yourself(programatically ), try next example:
public static void main(String[] args) {
JTable t = new JTable(new Object[][]{{1,2,3}},new Object[]{"1","2","3"});
JFrame frame = new JFrame();
frame.add(t.getTableHeader(),BorderLayout.NORTH);
frame.add(t);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setVisible(true);
}
I have added a scroll pane to the main panel of my frame. But it doesn't display properly, here's what I get that appears on the right:
http://postimage.org/image/extp3ncql/
here is the code:
JScrollPane jScrollPane = new JScrollPane(area);
jScrollPane.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
jScrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
jScrollPane.setViewportBorder(new LineBorder(Color.RED));
pane.add(jScrollPane, BorderLayout.EAST);
EDIT: Forgot to mention that area is a label.
1) Use another proper LayoutManager, I'd suggesst use Box or directly BoxLayout
or
2) all areas excluding BorderLayout.CENTER acepted PreferredSize came from JComponent
3) if your area is JTextArea the you can pretty to set JTextArea(int rows, int columns)
I have a JTable with autoResizeMode set to AUTO_RESIZE_LAST_COLUMN. I have added it to a panel by creating a JScrollPane with the JTable as its child widget, and then adding the JScrollPane to the panel.
I would like to set the size of the JScrollPane viewport to that of the parent JPanel, and have the JTable resize its last column dynamically.
JPanel have got implemented FlowLayout by defaut, you can place JScrollPane to the BorderLayout.CENTER
I think if you make the JPanel use GridLayout(1,1) and add the JScrollPane to it then you will get the desired result.
The first answer on this link How to make a JTable fill entire available space? worked perfectly for me.
I did the following
myPanel = new JPanel(new GridLayout());
myJtable = new JTable(MyTableModel);
myPanel.add(new JScrollPane(myJtable));
I want to have a scrollpane inside a panel while the scrollpane covers the whole panel. How can I do that?
Ensure the JPanel has a BorderLayout, then add the JScrollPane to the BorderLayout.CENTER constraint. Of course, don't add anything else to the NORTH/E/W/S constraints.