One JTable in a JScrollPane.

Hi all,
I have one JTable with JTable.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
This table is in a JScrollPane. I want this JSrollPane to fit the table, not the JFrame that contains all of them.
The JTable is not big at all, only 4 columns, so when I resize the JFrame and I make it smaller enough to cover a piece of the JTable, the JScrollPane should show its scrollbars.
Thanks in advance.
Dani.

import javax.swing.*;
import java.awt.Dimension;
public class Test extends JFrame {
public Test() {
super();
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setSize(500,500);
JTable table = new JTable(20,4);
table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
JScrollPane scroll = new JScrollPane(table);
scroll.setMinimumSize(new Dimension(304,0));
JPanel panel = new JPanel();
// panel.add(...)
JSplitPane split = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT,scroll,panel);
split.setDividerLocation(304);
getContentPane().add(split);
public static void main(String [] args) {
new Test().show();

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Unable to grow and shrink a JTable within a JScrollPane

I need help with the following: I want to display a JTable component with a calendar like design. Dragging the size of the parent component (having a border to drag) should dynamically adapt the JTable' size and its cells. Since the JTable has a minimum size shrinking the parent component should show scrollbars if the minimum size is reached horizontal or vertical respectively.
I have the JTable put ijnto the viewport of a scrollpane and the scrollpane is the child component of a JPanel. So dragging appears with the panel.
The JTable cells do nicely but from a specific size on there is a grey area on the lower part of the JPanel which is not repainted. What is causing this? What do I have to do? I'm lost in the jungle of invalidate(), repaint(), update(), doLayout() etc.
Here is my SSCCE (at least I hope it is one):
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.event.ComponentAdapter;
import java.awt.event.ComponentEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.ListSelectionModel;
import javax.swing.UIManager;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.TableColumn;
import javax.swing.table.TableModel;
//public class MyComponent extends JScrollPane
public class MyComponent extends JPanel
///   class data
     static public final long serialVersionUID = -1L;
     static public final int c_ColWidth = 29;
     static public final int c_RowHeight = 18;
     static public final int c_TableWidth = 930;
     static public final int c_TableHeight = 234;
///   instance data
     private String[] m_strColHeader = {
          "01", "02", "03", "04", "05", "06", "07", "08", "09", "10",
          "11", "12", "13", "14", "15", "16", "17", "18", "19", "20",
          "21", "22", "23", "24", "25", "26", "27", "28", "29", "30",
          "31",
     private Object[][] m_Data = new Object[12][33];// data array
     private TableModel m_DataModel = new AbstractTableModel() {
          static public final long serialVersionUID = -1L;
          public int getColumnCount() { return m_strColHeader.length; }
          public int getRowCount() { return m_Data != null ? m_Data.length : 0; }
          public Object getValueAt(int row, int col) { return m_Data[row][col]; }
          public String getColumnName(int col) { return m_strColHeader[col]; }
          public Class getColumnClass(int col) { return String.class; }
          public boolean isCellEditable(int row, int col) { return false; }
          public void setValueAt(Object aValue, int row, int col) {
               m_Data[row][col] = aValue;
     protected BorderLayout myLayout = new BorderLayout();
     protected JTable tableView = new JTable(m_DataModel);
     protected JScrollPane scrollPane = new JScrollPane(tableView);
///   public class methods
     static public void main(String[] args)
          try
               UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
          catch(Exception e)
               e.printStackTrace();
          MyComponent comp1 = new MyComponent();
          JFrame frame = new JFrame("MyComponent");
          frame.addWindowListener(new WindowAdapter() {
               public void windowClosing(WindowEvent e) {
                    System.exit(0);
          frame.getContentPane().add(comp1);
          frame.pack();
          frame.setVisible(true);
///   constructors
     public MyComponent()
          try
               jbInit();
               initTable();
          catch(Exception ex)
               ex.printStackTrace();
///   protected instance methods
     protected void initTable()
          // do nor allow user interaction with calendar view
          tableView.getTableHeader().setReorderingAllowed(false);
          tableView.getTableHeader().setResizingAllowed(false);
          //tableView.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
          tableView.setRowHeight(c_RowHeight);
          // adapt all CellRenderers
          for (int i = 0; i < m_DataModel.getColumnCount(); i++)
               TableColumn column = tableView.getColumn(tableView.getColumnName(i));
               column.setMinWidth(c_ColWidth);
               column.setPreferredWidth(c_ColWidth);
///   private instance methods
     private void jbInit() throws Exception
          this.setLayout(myLayout);
          this.add(scrollPane, BorderLayout.CENTER);
          scrollPane.getViewport().setMinimumSize(new Dimension(c_TableWidth, c_TableHeight));
          scrollPane.getViewport().setPreferredSize(new Dimension(c_TableWidth, c_TableHeight));
          tableView.setPreferredSize(new Dimension(c_TableWidth, c_TableHeight));
          addComponentListener(new MyComponent_componentAdapter(this));
///   event handling
     public void componentBoundsChanged(ComponentEvent e)
          scrollPane.setBounds(0, 0, getWidth(), getHeight());
          scrollPane.getViewport().setBounds(0, 0, getWidth(), getHeight());
          //tableView.setBounds(0, 0, getWidth(), getHeight());
          tableView.setSize(scrollPane.getViewport().getWidth(), scrollPane.getViewport().getHeight());
          tableView.setRowHeight(getBounds().height / 13 < c_RowHeight ?
                    c_RowHeight : getBounds().height / 13);
          System.out.println("componentBoundsChanged: getBounds() = " + getBounds());
          System.out.println("componentBoundsChanged: getSize() = " + getSize());
          System.out.println("componentBoundsChanged: getViewport().getBounds() = " + scrollPane.getViewport().getBounds());
          System.out.println("componentBoundsChanged: getViewport().getSize() = " + scrollPane.getViewport().getSize());
          System.out.println("componentBoundsChanged: tableView.getBounds() = " + tableView.getBounds());
          System.out.println("componentBoundsChanged: tableView.getSize() = " + tableView.getSize());
///   event adapters
class MyComponent_componentAdapter extends ComponentAdapter
     protected MyComponent adaptee;
     MyComponent_componentAdapter(MyComponent adaptee)
          this.adaptee = adaptee;
     public void componentMoved(ComponentEvent e)
          adaptee.componentBoundsChanged(e);
     public void componentResized(ComponentEvent e)
          adaptee.componentBoundsChanged(e);
}

I guess i am facing exactly opposite problem.
What i want to do is, I have nested tables in a scroll pane. So I don't want a scroll pane to show exactly whatever visible rows are there in Table (No extra space). If i expand any row, i want scroll pane to be able to show expanded.

Remove Column Headers from a JTable in a JScrollPane

Hi,
I'm just wondering how to remove the column headers from a JTable in a JScrollPane.

Here are two ways to do it, with different visual outcomes...
import javax.swing.*;
public class Test {
    public static void main(String[] args) {
        Object[][] rowData = {{"A", "B"}, {"C", "D"}};
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}

Resizing columns in a JTable in a JScrollpane

I have a JTable in a JScrollpane and I after I load the table, I resize the columns to fit the data (works well).
The problem is that I want the scrollpane to stay the same size and let the table scroll horizontally inside the viewport. The actual result is the scrollpane stretches to the width of the table causing the user to scroll the panel rather than the scrollpane.
I've tried setting the scrollbar policy but that didn't work.

I am passing the JTable to the constructor of the JScrollPane.
I have a JTable in a JScrollPane that sits on a JPanel which is in a JScrollPane itself.
After I load the data into the JTable, I resize all of the columns to fit the data.
The problem is that the JTable resizes wider than original size causing the whole panel to scroll horizontally. I would rather have the JScrollPane that the JTable is in scroll.

Jtable inside a JscrollPane - Can't see the left hand side of my Jtable (th

Jtable inside a JscrollPane - Can't see the left hand side of my Jtable (the border)from some reason - please help. This is my code:
public class RecordSetPanel extends JPanel {
private JTable rsTable;
private JScrollPane tableScrollPane;
public RecordSetPanel() {
setLayout(new BorderLayout());
rsTable = new JTable();
rsTable.setBackground(getBackground());
rsTable.setRowHeight(25);
rsTable.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
tableScrollPane = new JScrollPane(rsTable) {
public Insets getInsets() {
return new Insets(20, 20, 20, 20);
tableScrollPane.setBorder(BorderFactory.createLineBorder(getBackground()));
add(tableScrollPane, BorderLayout.CENTER);

I've tested this code and it looks fine:
import java.awt.*;
import javax.swing.*;
import javax.swing.table.*;
public class Dialog1
    extends JDialog {
JPanel panel1 = new JPanel();
BorderLayout borderLayout1 = new BorderLayout();
public Dialog1(Frame frame, String title, boolean modal) {
    super(frame, title, modal);
    try {
      jbInit();
      pack();
    catch (Exception ex) {
      ex.printStackTrace();
public Dialog1() {
    this(null, "", false);
public static void main(String args[]) {
    new Dialog1().show();
private void jbInit() throws Exception {
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    panel1.add(new RecordSetPanel(), BorderLayout.CENTER);
    getContentPane().add(panel1);
public class RecordSetPanel
      extends JPanel {
    private JTable rsTable;
    private JScrollPane tableScrollPane;
    public RecordSetPanel() {
      setLayout(new BorderLayout());
      TableModel dataModel = new AbstractTableModel() {
        public int getColumnCount() {
          return 10;
        public int getRowCount() {
          return 10;
        public Object getValueAt(int row, int col) {
          return new Integer(row * col);
      rsTable = new JTable(dataModel);
//      rsTable.setBackground(getBackground());
      rsTable.setRowHeight(25);
      rsTable.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
//      tableScrollPane = new JScrollPane(rsTable) {
//        public Insets getInsets() {
//          return new Insets(20, 20, 20, 20);
//      tableScrollPane.setBorder(BorderFactory.createLineBorder(getBackground()));
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Displaying more than one JTable

Hello people. I tried creating a JScrollPane with a JTable passed to its constructor. This worked fine but i cant add any more tables to the JScrollPane.
I could use a new window for each table but I would preffer to keep all tables on one component. Should I be using something else instead of a JScrollPane?

You'll need to nest components. Add each JTable to its own JScrollPane. You can then add each ScrollPane to a JPanel or JSplitPane.

Multiple JTables in a JScrollPane

Hi,
Hope someone can help...
I have a JScrollPane, to which I want to add a series of JTable and JLabel objects (determined at run-time). I have added a JPanel with layout set to TableLayout. When I add the objects, I successfully get the objects showing one below each other. However the tables automatically resize to the same width as the widest one. Which is a bit frustrating when some of the tables have two or three small columns, and one has > 30 wide columns.
There is probably something simple that I'm missing.
    JScrollPane newPane = new JScrollPane();
    newPane.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
    newPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
      JPanel p = new JPanel();
      double size[][] = {{2, TableLayout.PREFERRED}, {2, TableLayout.PREFERRED}};
      TableLayout t = new TableLayout(size);
      TableLayoutConstraints tlc = new TableLayoutConstraints();
      p.setLayout(t);
      int rowNumber = 1;
      while (true) {
            JLabel warninglabel = new JLabel(warnText);
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            t.insertRow(rowNumber, border);
            rowNumber++;
            t.insertRow(rowNumber, table.getTableHeader().getPreferredSize().getHeight());
            p.add(table.getTableHeader(), new String("1," + rowNumber));
            rowNumber++;
            t.insertRow(rowNumber, table.getPreferredSize().getHeight() + padHeight);
            p.add(table, new String("1," + rowNumber));
            rowNumber++;
            //Add a spacer
            t.insertRow(rowNumber, border);
            rowNumber++;
      newpane.getViewport().add(p);

I think this is going to take a while to do. Here's a suggestion though. Try to put a resize listener on each of the viewports in each of the two table scrollpanes. When the size of the viewport changes, set the size of the corresponding scrollpane to that same size.

Problem with JTable in a JScrollPane

Hello all,
I have a problem using JTable, that the number of columns is very big,
and the JScrollPane shows only vertical ScrollBar, isn't there any way to show a horizontal ScrollBar, to show the other columns without being bunched.
Thanks in advance.

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I have a JTable in JScrollPane which has about 116000 rows of data. I would like to get a status count of what rows are displayed at a time when I move down the scollPane. This is to keep a running track of rows displayed in status message when moving down the scrollpane.
SAY : Displaying rows 10 to 40 of 116000 rows. Is there anyway to get this count.

I would use a combination of:
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and
[JTable.rowAtPoint()|http://java.sun.com/javase/6/docs/api/javax/swing/JTable.html#rowAtPoint%28java.awt.Point%29]

How to remove JTable header from JScrollPane?

Hi!
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scrollpane.setColumnHeaderView( null )
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Thanks!
Fil

Hi,
The easiest way to do this is to put an extra layer between the table and the scrollpane as follows:-
JPanel p = new JPanel(new BorderLayout());
// Add it to the north rather than center so that the table background color
// won't cover the empty part of the view port.
p.add(table, BorderLayout.NORTH);
JViewport v = tableScroll.getViewport();
v.setView(p);
where table is your JTable and tableScroll is your JScrollPane.
Hope this helps,
Ian

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rs = stat.executeQuery(query);
model = new ResultSetTableModel(rs); <--- a class to create AbstractTable Model
JTable table = new JTabel(model)
will show only the data inside the model
I want to append some new information
How to do??

Use the DefaultTableModel and then the addRow(...) method to add additional rows.

Reading big JTable from disk one page at a time

Hi,
I'm trying to display a JTable in its JScrollPane
for a large amount of data (say 40'000 records).
Scrolling is quite smart, since it does a relatively
good job when the user drags the knob, e.g. in order
to reach the bottom. However, it leaves something to
be desired. Any pointer to some example implementation?
In particular, the table model should know how many
records are displayed at a time, and I found no easy
way for determining it. (I didn't make the table
editable yet, but the current page is needed whenever
the table is repainted, so it better be cashed.)
And, in some cases it would be better to not update
the view and just display a tooltip while the knob
is being dragged. That would cause much less reading.
In general, I need to adjust the cashing strategy
in order to accomplish what JScrollPane is doing.
Should I subclass it? Or should I subclass JTable?
TIA
Ale

In particular, the table model should know how many
records are displayed at a time, and I found no easy
way for determining it. (I didn't make the table
editable yet, but the current page is needed whenever
the table is repainted, so it better be cashed.)There are at least two ways of finding the beginning row/column and ending row/column of the viewport. One of which is by using the JScrollBar getValue() and the other is to use the JTable getVisibleRect() method -- with either method, you will need to convert it to Point and use the JTable rowAtPoint() and columnAtPoint() to translate the point to row/column index.
And, in some cases it would be better to not update
the view and just display a tooltip while the knob
is being dragged. That would cause much less reading.The best way to do this is to extend the BasicScrollPaneUI and implement your own ChangeListeners for the vertical and horizontal scroll bars as well as the viewport.
Good Luck!
;o)
V.V.

How to enable JScrollPane in a cell of the JTable

Hi,
I am able to place the components into the cell of the JTable. But I am unable to interact with the components like JTable or JComboBox after inseting them into a cell of the JTable.
This was the one of the Scenario:
Step 1: I created One JTable named as "insertTable"and adding to JScrollPane
Step 2: I'm able to inserted the newly created JTable ("insertTable") in to a cell of another JTable(like table inserting a table) using TableCellRenderer.
here was the problem. I am able to insert the newly created table into the cell. the "insertTable" size is greater the Cell size. So, the "insertTable" is appering with Horizantal and Vertical Scrollbars because the "insertTable" is added to JScrollBar. but I am unable to move the scrollbars.
please any one help me for this.

you still didn't try to learn the difference between cellEditor vs cellRenderer - as you were advised to do more than once in recent posts.
If you do, the answer will be obvious (to you :-). As long as you don't there's nothing to help
Cheers
Jeanette

JTable in jScrollPane

Hello, I am developing an application in Netbeans (Swing) with JDBC to connect mySQL. I got a question about a jTable in a jScrollPane. I read from my database and put the resultSet into a dinamical jTable. In the same form, I got a jTextField, where the user can input a code or a name to search in the jTable. When I find the code in the jTable I can select the row to remark the result. The problem I got is when the found code is not showing in the view of the table. So what I want to do, if it is possible, is automatically move the scroll to show the row I have selected; this way, the user don't have to move the scroll along the table (which could have a lot of rows). I have thought another solution could be show another frame with the data of selected row, but I want to try the first one.
If you know how can I do this please, help me.
I am sorry if my english is not very well. I hope you can understand my question.
Thanks

scphan wrote:
BigDaddyLoveHandles wrote:
JScrollPane scroll = new JScrollPane(new JTable(...));
or scroll.getViewport().setView( new JTable(...) );(no difference implied)So do it the simpler way.

Re: Using JScrollPane With JTable

>
myNamePane.setVisible(true);This is meaningless, a component becomes visible by default when you add it to a visible container
if(e.getSource().equals(newStudent))
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       newFrame.setContentPane(myNamePane);
       newFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
       newFrame.setResizable(false);
       newFrame.pack();
       newFrame.setVisible(true);
     }Which brings us to the main issue, you need to add the JScrollPane to you frame
newFrame.add(myNamePane);Read the tutorial: [Using Top-Level Containers|http://java.sun.com/docs/books/tutorial/uiswing/components/toplevel.html]

Hello Rodney,
Thanks for the information and the tutorial.. I've worked with containers before but never got around to reading that one, which has clarified a few things for me.
Unfortunately however, my problem persists. I obviously can't set the content pane as the JScrollPane and add it to the Frame, so rather than setting the JScrollPane as the content pane (which I did previously), I added it to the frame as you suggested:
if(e.getSource().equals(newStudent))
     JFrame newFrame = new JFrame("Please select a student");
//     newFrame.setContentPane(myNamePane);
     newFrame.add(myNamePane);
     newFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
     newFrame.setResizable(false);
     newFrame.pack();
     newFrame.setVisible(true);
}But the same thing happens! All I see is a new, empty JFrame. I feel like my understanding of the JScrollPane may be flawed, but I'm really not sure :/
Edit: In fact, it is most definitely a problem either with my JTable or my JScrollPane. I used the setPreferredSize() method to check if the JScrollPane was being displayed in the JFrame, and it is. There is no JTable in the pane however.
Edit #2: The problem was, in fact, with my JTable. The ResultSet I was using was TYPE_FORWARD_ONLY, and I was trying to call studentNameSet.first(), which prevented the JTable from ever being created. Thanks for your help, Rodney. Although I do have one more question.. Do you know a better way for me to find the number of student names given that ResultSet? I can't iterate through it twice as I had done earlier, so now for testing purposes I've simply hardcoded the number in, but I'd rather have the program find the total number of entries dynamically.
Edited by: Pheer on Jul 22, 2008 10:07 AM
Edited by: Pheer on Jul 22, 2008 10:09 AM

One JTable in a JScrollPane.

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