JScrollPane in JPanel???

Hi !!!
I want to add a JScrollPane to a JPanel, but it's doesn't work.
class Planche extends JPanel
JFrame f;
public Planche(JFrame f)
this.f = f;
this.setLayout(null);
JPanel p_tousGraphique = new JPanel();
p_tousGraphique.setLayout(null);
JScrollPane scrollPane = new JScrollPane(p_tousGraphique, JScrollPane.VERTICAL_SCROLLBAR_ALWAYS, JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
p_tousGraphique.setBounds(10,10,1800,1600);
this.add(scrollPane);
Thanks by advance!!!

Thanks for your answer, it's help to find the solution. The script display the scrollpane in the panel. But I have a problem. I want to put some componement in the jpanel and I do disable the layour manager
p_tousGraphique.setLayout(null);
But when I remove this line the scrollbar work fine, but my componement doesn't display like I want. So I disable the layour manager. The scrollbar display in jpanel but it doesn't scroll, dispite I have some componement that I don't see in my eye.
Thanks by advance !!!
My script that I do:
this.setLayout(new BorderLayout());
p_tousGraphique.setLayout(null);
JScrollPane scrollPane = new JScrollPane(p_tousGraphique, JScrollPane.VERTICAL_SCROLLBAR_ALWAYS, JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
scrollPane.setPreferredSize(new Dimension(p_tousGraphique.getWidth(),p_tousGraphique.getHeight()));
this.add(scrollPane);
this is my principale JPanel

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JScrollPane containing JPanel HELP!

Hi again,
I'll try my luck again!
Ok, I have a JPanel that uses a GridBagLayout with 3 columns and many rows. Each row is of the form:
[JLabel][JTextField][JButton]
Ok. Since I have many of these rows, and my application should be a constant size, I need to somehow make you able to scroll down the list of these labels,textfields and buttons - to the one you want. I have tried making the containing JPanel the viewport of a JScrollPane, however, when I only have a couple of rows of labels, textfields, and buttons, each expands to fit the viewport size - and they turn out looking really dumb.
How can I get it so that the labels, textfields and buttons are only the height of the text in each?
Please please, please, please help me.
sincerely, Edd.

Chenge the weight (x&y) in the GridBagConstraints of the components you don't want to expand to 0.0. Change the fill to GridBagConstraints.NONE.

To insert JScrollPane in JPanel

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Message was edited by:
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I know that if I set the JPanel's preferred size it will do this
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Make sure to add the panel to the content pane as well.
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Sounds very much like you're painting outside the paint cycle. Read this,
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Your help is very much appreciated.

don't set prefered size of the tag panel.
run this code pasted below. it work fine.
regards,
Pratap
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Problem with JScrollPane and Mouse Event in JDK 1.4

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Thanks.
In order to replicate the exact scenario, I have modified Sun's tutorial ScrollDemo2.java
* This code is based on an example provided by John Vella,
* a tutorial reader.
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import javax.swing.event.MouseInputAdapter;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
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Color.red, Color.blue, Color.green, Color.orange,
Color.cyan, Color.magenta, Color.darkGray, Color.yellow};
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instructionPanel.add(instructionsRight);
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else
if( e.getID() == FocusEvent.FOCUS_LOST )
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protected void paintComponent(Graphics g) {
super.paintComponent(g);
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g.setColor(colors[(i % color_n)]);
g.fillOval(rect.x, rect.y, rect.width, rect.height);
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super.processMouseEvent(pEvent);
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super.processMouseEvent(pEvent);
drawingArea.setBackground(Color.LIGHT_GRAY);
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size.width=0;
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drawingArea.repaint();
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I tried it . It didn't work.
Thanks for the suggestionI've got it... I know that inside the paitComponet method you can't call setSize() in jdk1.4, but you could in previous versions... that has caused al lot of problems to me...
Abraham

JScrollPane, JTextPane, Weird scrolling happening

The code below shows the problem I am having: In short, I have a textPane in a scrollPane but when I try to getViewPort.setViewPosition(0,0); then the scroll pane briefly flashes to position 0,0 then re positions itself to display the bottom of the text pane. It is driving me wild! If I removed the InsertString function call used on the Document of the textPane, then it works as I thought it should (apart from an initial glitch where the slider bar is placed near the top...- see example)
in the example I have a 'tall' JTextPane (ie, lot's of linefeeds) with a red panel all in a JPanel which inturn lies in a JScrollPane. Click on the 'Force Update' button to force the Text pane to be updated (in my real java class, there is other stuff to change the values of the textpane) and to set the display position to 0,0. Notice how the slider button flashes to the top of the vertical bar then returns to the bottom. If you cick on the 'toggle InsetString Active' button, then the code to Insert the String to the textArea is by-passed. Now clicking on the 'Force Update' button (after the initial glitch) does send the view to the top of the Jpanel(which now contains an empty textarea and a red panel).
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I'd appreciate any help as I'm quickly going bald....
Marc
code begins....
-------------------------cut here--------------------------
import javax.swing.*;
import java.awt.*; //for layout managers
import java.awt.event.*; //for action and window events
import javax.swing.text.*;
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screen.add(button);
screen.add(b2);
getContentPane().add(screen);
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JFrame frame = new WierdScroll();
frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
frame.pack();
frame.setVisible(true);
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public class ScrollPane extends JScrollPane
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public JTextPane margin;
public boolean allowInsertString = true;
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doc.insertString(0, "1\n2\n3\n4\n5\n6\n7\n8\n9\n0\n1\n2\n3\n4\n5\n6\n7\n8\n9\n0\n1\n2\n3\n4\n5\n6\n7\n8\n9\n0\n1\n2\n3\n4\n5\n6\n7\n8\n9\n0\n1\n2\n3\n4\n5\n6\n7\n8\n9\n0\n1\n2\n3\n4\n5\n6\n7\n8\n9\n0\n1\n2\n3\n4\n5\n6\n7\n8\n9\n0\n1\n2\n3\n4\n5\n6\n7\n8\n9\n0\n", normalStyle);
catch (BadLocationException ble) {}
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Cheers!
using the setCaretPosition() of the JTextPane instead of the getViewport().setViewPosition(new Point(0,0)) method of the JScrollPane works a treat.
But I would have thought that the scroll pane should have 'complete' control (unless specified by programmer) of what it displays. It seems strange to have a component of a scrollpane dictate to the scrollpane what it should show...
Thanks for your assistance.
On a different note, has anyone noticed that the word 'c l a s s' has become cl***?? Is this a victim of sun's new swear filter to go with the new site look?

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hi sir,
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please help me.
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import java.awt.*;
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import java.awt.event.ActionEvent;
import java.awt.event.WindowListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
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DefaultMutableTreeNode category = null;
DefaultMutableTreeNode book = null;
category = new DefaultMutableTreeNode("Books for Java Programmers");
top.add(category);
book = new DefaultMutableTreeNode("The Java Tutorial: A Short Course on the Basics");
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book = new DefaultMutableTreeNode("The Java Tutorial Continued: The Rest of the JDK");
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book = new DefaultMutableTreeNode("The JFC Swing Tutorial: A Guide to Constructing GUIs");
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book = new DefaultMutableTreeNode("The Java Programming Language");
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hi sir ,
thaks for u'r suggession.Its working fine but the
properties of the previous tree were not working
after setModel() property .like action at leaf node
is not working,I'm sorry but I don't understand. I think you are saying that the problem is solved but I can read it to mean that you still have a problem.
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               table.setValueAt((i+1)+"",i,0);
          table.setGridColor(Color.black);
          table.setSelectionBackground(new Color(125,255,144));
          table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
          table.setCellSelectionEnabled(true);
          table.addKeyListener(listener);
          table.addMouseListener(listener);
          table.getSelectionModel().addListSelectionListener(this);
          table.getColumnModel().addColumnModelListener(this);
          table.getColumnModel().getColumn(0).setResizable(false);
          table.getColumnModel().getColumn(0).setMinWidth(70);
          table.getColumnModel().getColumn(0).setMaxWidth(70);
JScrollPane tableScroll = new JScrollPane(table);
Dimension minimumSize = new Dimension(100,25);
tableScroll.setMinimumSize(minimumSize);
add(tableScroll);

Hi weebib ,
pls find some working code which shous my problame .
you can see its coming to column 'B'. but i want it to show from column 'A' .
sample working code : =
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
import javax.swing.table.*;
import java.util.*;
public class myTable extends JFrame{
JTable table;
JScrollPane jsp;
JPanel p1;
int NO_OF_ROWS = 64;
int NO_OF_COLUMNS = 65;
Vector vColumnNames ;
myTable(){
     Container con = getContentPane();
     p1 = new JPanel();
     table = new JTable(NO_OF_ROWS,NO_OF_COLUMNS){
          public boolean isCellEditable(int row, int column) {
                              if(column == 0){
                                   return false;
                              else{
                                   return true;
     setTableProperties();
     jsp = new JScrollPane(table);
     p1.add(jsp);
     con.add(p1);
     setSize(400,500);
     show();
     //System.out.println("Hello there");
public Vector getColumnIdentifiers(){
     vColumnNames = new Vector();
               for(int i=65;i<129;i++) {
                    vColumnNames.add(new String((char)i+""));// setting the alphabets for the column names //orig
     return vColumnNames ;
public void setTableProperties(){
     ((DefaultTableModel)table.getModel()).setColumnIdentifiers(getColumnIdentifiers());
     for(int i = 0;i<table.getRowCount();i++) {
                    table.setValueAt((i+1)+"",i,0);// Set the names of the row
     table.setGridColor(Color.black);
     table.setSelectionBackground( Color.RED);
     table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
     table.setCellSelectionEnabled(true);
     table.addMouseListener(new myMouseListener());
     table.addKeyListener(new myKeyListener());
//     table.getColumnModel().getColumn(0).setPreferredWidth(125);
//     table.getColumnModel().getColumn(0).setResizable(false);
//     table.getColumnModel().getColumn(0).setMinWidth(70);
//     table.getColumnModel().getColumn(0).setMaxWidth(70);
     for(int u =0 ;u<64;u++){
          if(u==0){
               table.getColumnModel().getColumn(u).setPreferredWidth(70);
          else{
               table.getColumnModel().getColumn(u).setPreferredWidth(200);
     table.changeSelection(0,1,false,false);
static public void main(String[] args){
          myTable test = new myTable();
          test.addWindowListener(new WindowAdapter(){
               public void windowClosing(WindowEvent e){System.exit(0);}
public class myMouseListener extends MouseAdapter{
     public void mousePressed(MouseEvent me){
               table.repaint();
public class myKeyListener extends KeyAdapter{
     public void keyPressed(KeyEvent ke){
               if(table.getSelectedColumn() == 0){
                    ke.consume();
================
pls do reply back if i am doing something wrong.
== Gavin

Help With JScrollPane and many JLabels...

I am in the process of designing an 'image browser' applet for a client, but am having some difficulty in deciding how I can most elegantly meet all of the requirements. The specification calls for an applet that can view up to 400 images (all images are small - 120 * 120 px), the view of the images can be scrolled (if not all are in the view) or scaled (zoom in and out on any area), and the images will need to 'animate' or move to new locations as sorting criteria changes. Also, I need to be able to group images into arbitrary n*n arrays and click on any image in the view (rollovers may also be necessary in the future).
At first, I thought this would be easily solved by putting the images (JLabels?) into as many groups (JPanels?) as necessary to meet the sort criteria, then adding the groups to my main view (JScrollPane w/JPanel) in a GridLayout. My current attempt at a solution scales the groups (JPanels) via. an overridden paintComponent method from within my main scrolling view (using g2d and scale). Unfortunately, I now have many problems that I am having trouble solving:
1. After I re-scale the JScrollPane (zoom in or out) and then try and scroll, the new images that scroll in are either garbled or just junk (seems like remnants of the original, non-scaled components?).
2. The scrollbars, at first, were not reflecting the current scaling and how much content is visible, so I overrode the getPreferredSize method in my JScrollPane content object to return (super.getPreferredSize * scaleFactor) - this fixes the appearance of the scroll bars (ie. they accurately reflect how much content there is), but it also offsets all of the images left depending on the scale value (less scale -> images offset further left).
3. I need pixel-perfect control over the images, so that I can animate the transition from one 'group' to another - I can't see a way to achieve this with my current solution.
Has anyone tried to do something like this before? What is a good way of accomplishing what I need here? Any code out there that does something similar? Any help would be appreciated, I've been banging my head against the wall over this for days now...
Thanks in advance,
Mike P.
Here is some relevant code:
/* From BrowserPanel (JPanel associated with my main JScrollPane) */
public void paint (Graphics g) {
    Graphics2D g2d = (Graphics2D) g;
    g2d.scale(scaleFactor, scaleFactor);
    super.paint(g2d);
/* From BrowserPanel (JPanel associated with my main JScrollPane) */
public Dimension getPreferredSize() {
    Dimension origSize = super.getPreferredSize();
    double originalSizeX;
    double originalSizeY;
    originalSizeX = origSize.getWidth();
    originalSizeY = origSize.getHeight();
    double newSizeX = originalSizeX * scaleFactor;
    double newSizeY = originalSizeY * scaleFactor;
    String strX = Double.toString(newSizeX);
    String strY = Double.toString(newSizeY);
    /* Round the string (discard anything after the decimal) */
    strX = strX.substring(0, strX.indexOf("."));
    strY = strY.substring(0, strY.indexOf("."));
    /* Convert string to int... */
    int x = Integer.parseInt(strX);
    int y = Integer.parseInt(strY);
    return new Dimension(x, y);
}

I increased the frame size to 3 lines and noticed the the flickering is a result of the text area painting itself without the scrollbar and then repainting itself with the scrollbar. I don't know why this happens, but a work around is to use:
ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS,

JScrollPane bar alignment

I posted this to ProjectSwing forum and never got a reply, maybe here someone knows...
I tried all the suggested methods, and yet I still get the vertical scroll bar aligned somewhere in the middle when the JFrame opens, when top alignment would be preferable... Any suggestion on this is more than welcome. My code is structured with nested components like this:
JScrollPane scroll
---JPanel allJPanels
------JPanel a
---------JPanel a_1
---------JLabel a_2
---------JEditorPane a_3
------JPanel b
---------JPanel b_1
---------JLabel b_2
---------JEditorPane b_3
scroll.setViewportView( allJPanels );
Methods attempted:
scroll.getVerticalScrollBar().setValue( scroll.getVerticalScrollBar().getMinimum() );
OR
scroll.getViewport().setViewPosition( new java.awt.Point( 0, 0 ) );
OR
scroll.getVerticalScrollBar().getModel().setValue( 0 );
OR
allJPanels.scrollRectToVisible( new java.awt.Rectangle( 1, 1, allJPanels.getWidth(), allJPanels.getHeight() ) );
Thanks for any suggestion

Strangely the problem was due to how this JFrame was initialised in another JFrame with the usual .pack() and .setVisible(). By implementing Runnable and initialising with new Thread and .start() in the main application JFrame the scroll bar seemed to obey its settings and aligned correctly to the top.

JScrollPane in JPanel???

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