JSplitPane and JTable

Hi
I have a JSplitPane containing two instances of an extended JPanel. The JPanel conatins some buttons, a combobox and a JTable. The problem is that on startup a small part of the right side of the JPanel is'nt showing. Only if I maximize the window.
The JFrame that holds the splitpane has ha fixed width: setBounds(10, 10, 750, 400)
The splitpane has setResizeWeight(0.5);
I've tried to call revalidate on the splitpane but it did'nt work.
Any ideas?

Apart from this, it has worked fine with FormLayout. Few lines of code, easy to change.
I'm going to experiment a bit, before I give up.
FormLayout layout = new FormLayout(
                    "left:default:grow, 2dlu, left:default, 2dlu, left:default,2dlu",
                    "default, 2dlu, default, 2dlu, default");
          CellConstraints cc = new CellConstraints();
          setLayout(layout);
          add(boxPath, cc.xy(1,1));
          add(btnReRead, cc.xy(3,1));
          add(btnRoot, cc.xy(5,1));
          add(navScroll, cc.xywh(1,3,5,1));
          add(txtCommand, cc.xywh(1,5,3,1));
          add(btnExecute, cc.xy(5,5));
                            System.out.println(getPreferredSize());In eclipse the preferred size is width=379,height=453
On the commandline it is width=457,height=453

Similar Messages

Using KeyMap in Editable JComboBoxes and JTable

I am using Keymapping for JTextFields. It works fine ! I am interested in extending the keymap feature to JComboBoxes and JTable.

if you want to do the keymapping inside the editable component of the combobox or the table, make sure you apply it on the editor component.e.g. comboBox.getEditor().getEditorComponent() and table.getCellEditor().getTableCellEditorComponent().

Escape key "dies" in combobox and JTable

I have set in my JDialog the default key ESCAPE as this standard code:
          KeyStroke escKey = KeyStroke.getKeyStroke(KeyEvent.VK_ESCAPE, 0);
          int param = JComponent.WHEN_IN_FOCUSED_WINDOW;
          root.getInputMap(param).put(escKey, "close");
          root.getActionMap().put("close", actionCancel);
     this.btCancel.setAction(actionCancel);
The problem is when I have JComboBoxs and JTables. All key events seem to be consumed
In this components (and maybe more components). So, if I press ESCAPE and my focus
in a combobox, the dialog won't close.
How could I work around this?
thank you

I've got the solution!
I have a javaBean (JPanel) that has only one JComboBox. I trigger key pressed (don't know
if should be key released in this case) on comboBox. Then I check if...
this.comboBox.isPopupVisible().
Simple. If popup is not visible and dispatch the event to this.
I just wonder how the event goes to my javaBean, my javabean is in a dialog and this
dialog of mine ends up to catch the event. ???
Ok, this stays has a solution for future developers to found - in case they guess that
right keywords :)

Jsplitpane and jpanel

Hi
I am new to Java Swing and therefore ADF Swing. Therefore, this may sound like a basic question.
I have created a swing empty form. Is it possible to have a parent-child relationship between jsplitpane and containers?
For e.g. the design is - the left site on jsplitpane will house a jtree component, and right side of jsplitpane will have a jtabbedPane container.
how do I achieve above.. please advise.
Thanks,
Darsh

For me is not very clear your question. Do you want such as a jpanel in the top the your layout? Like a header?
The location of each component in your page layout will depend on the type of Layout Managers you will use.
What are you using?

Not Updating the Values in the JComboBox and JTable

Hi Friends
In my program i hava Two JComboBox and One JTable. I Update the ComboBox with different field on A Table. and then Display a list of record in the JTable.
It is Displaying the Values in the Begining But when i try to Select the Next Item in the ComboBox it is not Updating the Records Eeither to JComboBox or JTable.
MY CODE is this
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.DefaultComboBoxModel.*;
import javax.swing.table.*;
import java.sql.*;
import java.util.*;
public class SearchBook extends JDialog implements ActionListener
 private JComboBox comboCategory,comboAuthor;
 private JSplitPane splitpane;
 private JTable table;
 private JToolBar toolBar;
 private JButton btnclose, btncancel;
 private JPanel panel1,panel2,panel3,panel4;
 private JLabel lblCategory,lblAuthor;
 private Container c;
 //DefaultTableModel model;
 Statement st;
 ResultSet rs;
 Vector v = new Vector();
 public SearchBook (Connection con)
 // Property for JDialog
 setTitle("Search Books");
 setLocation(40,110);
 setModal(true);
 setSize(750,450);
 // Creating ToolBar Button
 btnclose = new JButton(new ImageIcon("Images/export.gif"));
 btnclose.addActionListener(this);
 // Creating Tool Bar
 toolBar = new JToolBar();
 toolBar.add(btnclose);
 try
 st=con.createStatement();
 rs =st.executeQuery("SELECT BCat from Books Group By Books.BCat");
 while(rs.next())
 v.add(rs.getString(1));
 catch(SQLException ex)
 System.out.println("Error");
 panel1= new JPanel();
 panel1.setLayout(new GridBagLayout());
 GridBagConstraints c = new GridBagConstraints();
 c.fill = GridBagConstraints.HORIZONTAL;
 lblCategory = new JLabel("Category:");
 lblCategory.setHorizontalAlignment (JTextField.CENTER);
 c.gridx=2;
 c.gridy=2;
 panel1.add(lblCategory,c);
 comboCategory = new JComboBox(v);
 comboCategory.addActionListener(this);
 c.ipadx=20;
 c.gridx=3;
 c.gridwidth=1;
 c.gridy=2;
 panel1.add(comboCategory,c);
 lblAuthor = new JLabel("Author/Publisher:");
 c.gridwidth=2;
 c.gridx=1;
 c.gridy=4;
 panel1.add(lblAuthor,c);
 lblAuthor.setHorizontalAlignment (JTextField.LEFT);
 comboAuthor = new JComboBox();
 comboAuthor.addActionListener(this);
 c.insets= new Insets(20,0,0,0);
 c.ipadx=20;
 c.gridx=3;
 c.gridy=4;
 panel1.add(comboAuthor,c);
 comboAuthor.setBounds (125, 165, 175, 25);
 table = new JTable();
 JScrollPane scrollpane = new JScrollPane(table);
 //panel2 = new JPanel();
 //panel2.add(scrollpane);
 splitpane = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT,panel1,scrollpane);
 splitpane.setDividerSize(15);
 splitpane.setDividerLocation(190);
 getContentPane().add(toolBar,BorderLayout.NORTH);
 getContentPane().add(splitpane);
 public void actionPerformed(ActionEvent ae)
 Object obj= ae.getSource();
 if(obj==comboCategory)
 String selecteditem = (String)comboCategory.getSelectedItem();
 displayAuthor(selecteditem);
 System.out.println("Selected Item"+selecteditem);
 else if(obj==btnclose)
 setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);
 else if(obj==comboAuthor)
 String selecteditem1 = (String)comboAuthor.getSelectedItem();
 displayavailablity(selecteditem1);
 //System.out.println("Selected Item"+selecteditem1);
 System.out.println("Selected Author"+selecteditem1);
 private void displayAuthor(String selecteditem)
 try
 { Vector data = new Vector();
 rs= st.executeQuery("SELECT BAuthorandPublisher FROM Books where BCat='" + selecteditem + "' Group By Books.BAuthorandPublisher");
 System.out.println("Executing");
 while(rs.next())
 data.add(rs.getString(1));
 //((DefaultComboBoxModel)comboAuthor.getModel()).setVectorData(data);
 comboAuthor.setModel(new DefaultComboBoxModel(data));
 catch(SQLException ex)
 System.out.println("ERROR");
 private void displayavailablity(String selecteditem1)
 try
 Vector columnNames = new Vector();
 Vector data1 = new Vector();
 rs= st.executeQuery("SELECT * FROM Books where BAuthorandPublisher='" + selecteditem1 +"'");
 ResultSetMetaData md= rs.getMetaData();
 int columns =md.getColumnCount();
 String booktblheading[]={"Book ID","Book NAME","BOOK AUTHOR/PUBLISHER","REFRENCE","CATEGORY"};
 for(int i=1; i<= booktblheading.length;i++)
 columnNames.addElement(booktblheading[i-1]);
 while(rs.next())
 Vector row = new Vector(columns);
 for(int i=1;i<=columns;i++)
 row.addElement(rs.getObject(i));
 data1.addElement(row);
 //System.out.println("data is:"+data);
 ((DefaultTableModel)table.getModel()).setDataVector(data1,columnNames);
 //DefaultTableModel model = new DefaultTableModel(data1,columnNames);
 //table.setModel(model);
 rs.close();
 st.close();
 catch(SQLException ex)
}Please check my code and give me some Better Solution
Thank you

You already have a posting on this topic:
http://forum.java.sun.com/thread.jspa?threadID=5143235

Vectors and JTable

There is 2 things I am having problems with. I have 2 vectors I need to combine. I am not sure how to combine vectors. Also I am trying to enter the information in the vectors into a JTable. I have the column names in the JTable. Here is some of the code I have now.
//enters the column names into a vector which does display in the Jtable
StringTokenizer stringTokenizer = new StringTokenizer(names, test);
while(stringTokenizer.hasMoreTokens())
columnNames.add(stringTokenizer.nextToken());
right now I have a 2 vectors named partinfo and nsinfo. I am not sure how to combine them the information needs to line up. For the Jtable I know it needs a vector of vectors but I am not sure how to do that. Thanks for anay help.

I am still having problems. I think I got the 2 vectors combined. I can get it to output but it displays the same entry in every row. Here is how I combined and displayed. Thanks for any help.
for(int j=0; j <partinfo.size(); j++)
newnsn = "";
partinfo.elementAt(j).toString();
tempData = (PARTS)partinfo.elementAt(j);
nsninfo.elementAt(j).toString();
tempSpace = (NSN)nsninfo.elementAt(j);
newnsn = tempSpace.nsn1 +" " tempSpace.nsn2 " " tempSpace.nsn3 " " +tempSpace.nsn4;
rowData.addElement(selectpart);
rowData.addElement(test4);
rowData.addElement(tempData.part);
rowData.addElement(test4);
rowData.addElement(test4);
rowData.addElement(tempData.cage);
rowData.addElement(tempData.smr);
rowData.addElement(tempData.desc);
rowData.addElement(newnsn);
System.out.println(j);
}//for
for(int q=0; q <rowData.size(); q++)
data.addElement(rowData);
System.out.println(q);
StringTokenizer stringTokenizer = new StringTokenizer(names, test);
while(stringTokenizer.hasMoreTokens())
columnNames.add(stringTokenizer.nextToken());
rowData.setSize(getRowCount());
columnNames.setSize(getColumnCount());
DefaultTableModel model = new DefaultTableModel(data, columnNames);
table = new JTable(model);

MS Access and JTable Question......

I have a MS Access Database file and I want to display the data on my JTable using JDBC/ODBC connectivity? Is this possible? how would the coding be like? Does anyone have a similar example?

try,
http://www.geocities.com/rmlchan/dba.html

Questions about Using Vector To File And JTable

hi all
I want to write all data from Vector To File and read from file To Vector
And I want To show all data from vector to JTable
Note: I'm using the JBuilder Compiler
This is Class A that my datamember And Methods in it
import java.io.*;
* Title: 
* Description: 
* Copyright: Copyright (c) 2008
* Company: 
* @author unascribed
* @version 1.0
public class A implements Serializable {
int no;
String name;
int age;
public void setA (int n,String na,int a)
 no=n;
 name=na;
 age=a;
public void set_no(int n)
 no = n;
public void set_age(int a)
 age = a;
 public int getage ()
 return age;
public void setName(String a)
 name = a;
public String getname ()
 return name;
public int getno ()
 return no;
This is The Frame That the JTextFeild And JButtons & JTable in it
import java.awt.*;
import java.io.*;
import java.util.*;
import com.borland.jbcl.layout.*;
import javax.swing.*;
import java.awt.event.*;
import javax.swing.table.*;
import javax.swing.border.*;
* Title: 
* Description: 
* Copyright: Copyright (c) 2008
* Company: 
* @author unascribed
* @version 1.0
public class Frame1 extends JFrame {
/* Vector v = new Vector ();
public int i=0;*/
A a = new A();
XYLayout xYLayout1 = new XYLayout();
JTextField txtno = new JTextField();
JTextField txtname = new JTextField();
JTextField txtage = new JTextField();
JButton add = new JButton();
JButton search = new JButton();
/*JTable jTable1 = new JTable();
TableModel tableModel1 = new MyTableModel(*/
 TableModel dataModel = new AbstractTableModel() {
 public int getColumnCount() { return 2; }
 public int getRowCount() { return 2;}
 public Object getValueAt(int row, int col) { return new A(); }
 JTable table = new JTable(dataModel);
 JScrollPane scrollpane = new JScrollPane(table);
TitledBorder titledBorder1;
TitledBorder titledBorder2;
ObjectInputStream in;
ObjectOutputStream out;
JButton read = new JButton();
public Frame1() {
 try {
 jbInit();
 catch(Exception e) {
 e.printStackTrace();
private void jbInit() throws Exception {
 titledBorder1 = new TitledBorder(BorderFactory.createEmptyBorder(),"");
 titledBorder2 = new TitledBorder("");
 this.getContentPane().setLayout(xYLayout1);
 add.setBorder(BorderFactory.createRaisedBevelBorder());
 add.setNextFocusableComponent(txtno);
 add.setMnemonic('0');
 add.setText("Add");
 add.addActionListener(new java.awt.event.ActionListener() {
 public void actionPerformed(ActionEvent e) {
 add_actionPerformed(e);
 add.addActionListener(new java.awt.event.ActionListener() {
 public void actionPerformed(ActionEvent e) {
 add_actionPerformed(e);
 search.setFocusPainted(false);
 search.setText("Search");
 search.addActionListener(new java.awt.event.ActionListener() {
 public void actionPerformed(ActionEvent e) {
 search_actionPerformed(e);
 xYLayout1.setWidth(411);
 xYLayout1.setHeight(350);
 read.setText("Read");
 read.addActionListener(new java.awt.event.ActionListener() {
 public void actionPerformed(ActionEvent e) {
 read_actionPerformed(e);
 this.getContentPane().add(txtno, new XYConstraints(43, 35, 115, 23));
 this.getContentPane().add(txtname, new XYConstraints(44, 67, 114, 22));
 this.getContentPane().add(txtage, new XYConstraints(44, 97, 115, 23));
 this.getContentPane().add(add, new XYConstraints(60, 184, 97, 26));
 this.getContentPane().add(search, new XYConstraints(167, 185, 88, 24));
 this.getContentPane().add(table, new XYConstraints(187, 24, 205, 119));
 this.getContentPane().add(read, new XYConstraints(265, 185, 75, 24));
 this.setSize(450,250);
 table.setGridColor(new Color(0,0,255));
void add_actionPerformed(ActionEvent e)
 a.set_no(Integer.parseInt(txtno.getText()));
 a.setName(txtname.getText());
 a.set_age(Integer.parseInt(txtage.getText()));
 fileOutput();
 txtno.setText(null);
 txtname.setText(null);
 txtage.setText(null);
 try
 out.writeObject(a);
 out.close();
 }catch (Exception excep){};
/* try
 add.setDefaultCapable(true);
 v.addElement(new A());
 ((A)v.elementAt(i)).setA(Integer.parseInt(txtno.getText()),txtname.getText(),Integer.parseInt(txtage.getText()));
 JOptionPane.showMessageDialog(null,"The Record is Added");
 txtno.setText(null);
 txtname.setText(null);
 txtage.setText(null);
 i++;
}catch (Exception excep){};*/
void search_actionPerformed(ActionEvent e) {
 int n = Integer.parseInt(JOptionPane.showInputDialog("Enter No:"));
 for (int i=0;i<v.size();i++)
 if (((A)v.elementAt(i)).getno()==n)
 txtno.setText(Integer.toString(((A)v.elementAt(i)).getno()));
 txtname.setText(((A)v.elementAt(i)).getname() );
 txtage.setText(Integer.toString(((A)v.elementAt(i)).getage()));
public void fileOutput()
 try
 out = new ObjectOutputStream(new FileOutputStream("c:\\UserData.txt",true));
 }catch(Exception excep){};
public void fileInput()
 try
 in = new ObjectInputStream(new FileInputStream("c:\\UserData.txt"));
 }catch(Exception excep){};
void read_actionPerformed(ActionEvent e) {
fileInput();
 try
 a = (A)in.readObject();
 txtno.setText(Integer.toString(a.getno()));
 txtname.setText(a.getname());
 txtage.setText(Integer.toString(a.getage()));
 }catch (Exception excep){};
}

//program which copies string data between vector and file
import java.util.*;
import java.io.*;
class Util
private Vector v;
private FileReader filereader;
private FileWriter filewriter;
Util(String data[])throws Exception
v=new Vector();
for(String o:data)
 v.add(o);
public void listData()throws Exception
int size=v.size();
for(int i=0;i<size;i++)
 System.out.println(v.get(i));
public void copyToFile(String data,String fname)throws Exception
filewriter =new FileWriter(fname);
filewriter.write(data);
filewriter.flush();
System.out.println("Vector content copied into file..."+fname);
public void copyFromFile(String fname)throws Exception
filereader=new FileReader(fname);
char fcont[]=new char[(int)new File(fname).length()];
filereader.read(fcont,0,fcont.length);
String temp=new String(fcont);
String fdata[]=temp.substring(1,temp.length()-1).split(",");
for(String s:fdata)
 v.add(s.trim());
System.out.println("File content copied into Vector...");
public String getData()throws Exception
 return(v.toString());
class TestUtil
public static void main(String a[])throws Exception
String arr[]={"siva","rama","krishna"};
Util util=new Util(arr);
System.out.println("before copy from file...");
util.listData();
String fname=System.getProperty("user.home")+"\\"+"vecdata";
util.copyToFile(util.getData(),fname);
util.copyFromFile(fname);
System.out.println("after copy from file...");
util.listData();
}

Problem with JPanel, JScroll and JTable

Hi.
On one of my Jframes, i have 3 Jpanels. There are two on one side, and one of the other which spans the height of the other two. However, it does more than span the height of the other two, it streches the height of the Jframe as it is about 300 pixels too heigh.
I'm not sure which element is streching the JPanel, it might be either the Jpanel itself, the JScroll or the JTable. Theres alot of code, however i'm going to try and cut out the irrelevent parts.
I call the Jpanel via:
FarmList = new javax.swing.JPanel();
FarmList.setBorder(javax.swing.BorderFactory.createTitledBorder(null, "Farm List", javax.swing.border.TitledBorder.DEFAULT_JUSTIFICATION, javax.swing.border.TitledBorder.DEFAULT_POSITION, new java.awt.Font("Tahoma", 1, 11)));
FarmList.add(new GetFarms());And the code for the GetFarms() class is:
public class GetFarms extends JPanel {
 private final int COLUMNS = 4;
 private int ROWS = 2;
 private JTable sampleJTable;
 private String[][] cells = new String[ROWS][COLUMNS];
 public static void main(String[] args) throws Exception {
 JFrame frame = new JFrame("Covenant Farm List");
 frame.add(new GetFarms());
 frame.setSize(450,150);
 frame.setVisible(true);
 public GetFarms() throws Exception {
 URL theUrl = new URL("http://www.allydm.co.uk/Covenant/farm_list.php");
 BufferedReader in = new BufferedReader(
 new InputStreamReader(
 theUrl.openStream()));
 String inputLine = in.readLine();
 String[] lines = inputLine.split(" ");
 for (int i = 0; i < ROWS; i++) {
 String[] stuff = lines.split(" ");
 for (int j = 0; j < COLUMNS; j++) {
 cells[i][j] = stuff[j];
 in.close();
 String[] columnNames = {"Username", "DA", "Sentry", "Last Update"};
 sampleJTable = new JTable(cells, columnNames);
 JScrollPane tablePane = new JScrollPane(sampleJTable);
add(tablePane, BorderLayout.CENTER);
If anyone has any ideas, on how to limit the size of the Jpanel or JScroll it'd be greatly appreciated.

did you implement setxxxSize() methods?
see
http://java.sun.com/docs/books/tutorial/uiswing/components/layeredpane.html

One model for JTree and JTable

Hi.
Is it possible for a JTree and a JTable to share one model?
Thank you

Hope u r not using Comonent TreeTable
If u have Tree & Table different components, just want to have a common model then u can try this,
It is nothing but default implementation given in DefaultTableModel
public class MyTreeTableModel extends DefaultTreeModel implements TableModel, Serializable {
protected Vector dataVector;
/** List of listeners */
protected EventListenerList listenerList = new EventListenerList();
/** The <code>Vector</code> of column identifiers. */
protected Vector columnIdentifiers;
public MyTreeTableModel(TreeNode root) {
this(root, false);
// constructor for TreeModel only
public MyTreeTableModel(TreeNode root, boolean asksAllowsChildren) {
super(root, asksAllowsChildren);
// constructor for TableModel only
public MyTreeTableModel() {
this(0, 0);
private static Vector newVector(int size) {
Vector v = new Vector(size);
v.setSize(size);
return v;
// constructor for TableModel only
public MyTreeTableModel(int rowCount, int columnCount) {
this(newVector(columnCount), rowCount);
// constructor for TableModel only
public MyTreeTableModel(Vector columnNames, int rowCount) {
super(null);
setDataVector(newVector(rowCount), columnNames);
// constructor for TableModel only
public MyTreeTableModel(Object[] columnNames, int rowCount) {
this(convertToVector(columnNames), rowCount);
// constructor for TableModel only
public MyTreeTableModel(Vector data, Vector columnNames) {
super(null);
setDataVector(data, columnNames);
// constructor for TableModel only
public MyTreeTableModel(Object[][] data, Object[] columnNames) {
super(null);
setDataVector(data, columnNames);
* Returns a default name for the column using spreadsheet conventions:
* A, B, C, ... Z, AA, AB, etc. If <code>column</code> cannot be found,
* returns an empty string.
* @param column the column being queried
* @return a string containing the default name of <code>column</code>
private String getDefaultColumnName(int column) {
String result = "";
for (; column >= 0; column = column / 26 - 1) {
result = (char)((char)(column%26)+'A') + result;
return result;
* Returns a column given its name.
* Implementation is naive so this should be overridden if
* this method is to be called often. This method is not
* in the <code>TableModel</code> interface and is not used by the
* <code>JTable</code>.
* @param columnName string containing name of column to be located
* @return the column with <code>columnName</code>, or -1 if not found
public int findColumn(String columnName) {
for (int i = 0; i < getColumnCount(); i++) {
if (columnName.equals(getColumnName(i))) {
return i;
return -1;
* Returns <code>Object.class</code> regardless of <code>columnIndex</code>.
* @param columnIndex the column being queried
* @return the Object.class
public Class getColumnClass(int columnIndex) {
return Object.class;
// Managing Listeners
* Adds a listener to the list that's notified each time a change
* to the data model occurs.
* @param l the TableModelListener
public void addTableModelListener(TableModelListener l) {
listenerList.add(TableModelListener.class, l);
* Removes a listener from the list that's notified each time a
* change to the data model occurs.
* @param l the TableModelListener
public void removeTableModelListener(TableModelListener l) {
listenerList.remove(TableModelListener.class, l);
* Returns an array of all the table model listeners
* registered on this model.
* @return all of this model's <code>TableModelListener</code>s
* or an empty
* array if no table model listeners are currently registered
public TableModelListener[] getTableModelListeners() {
return (TableModelListener[])listenerList.getListeners(
TableModelListener.class);
// Fire methods
* Notifies all listeners that all cell values in the table's
* rows may have changed. The number of rows may also have changed
* and the <code>JTable</code> should redraw the
* table from scratch. The structure of the table (as in the order of the
* columns) is assumed to be the same.
public void fireTableDataChanged() {
fireTableChanged(new TableModelEvent(this));
* Notifies all listeners that the table's structure has changed.
* The number of columns in the table, and the names and types of
* the new columns may be different from the previous state.
* If the <code>JTable</code> receives this event and its
* <code>autoCreateColumnsFromModel</code>
* flag is set it discards any table columns that it had and reallocates
* default columns in the order they appear in the model. This is the
* same as calling <code>setModel(TableModel)</code> on the
* <code>JTable</code>.
public void fireTableStructureChanged() {
fireTableChanged(new TableModelEvent(this, TableModelEvent.HEADER_ROW));
* Notifies all listeners that rows in the range
* <code>[firstRow, lastRow]</code>, inclusive, have been inserted.
* @param firstRow the first row
* @param lastRow the last row
public void fireTableRowsInserted(int firstRow, int lastRow) {
fireTableChanged(new TableModelEvent(this, firstRow, lastRow,
TableModelEvent.ALL_COLUMNS, TableModelEvent.INSERT));
* Notifies all listeners that rows in the range
* <code>[firstRow, lastRow]</code>, inclusive, have been updated.
* @param firstRow the first row
* @param lastRow the last row
public void fireTableRowsUpdated(int firstRow, int lastRow) {
fireTableChanged(new TableModelEvent(this, firstRow, lastRow,
TableModelEvent.ALL_COLUMNS, TableModelEvent.UPDATE));
* Notifies all listeners that rows in the range
* <code>[firstRow, lastRow]</code>, inclusive, have been deleted.
* @param firstRow the first row
* @param lastRow the last row
public void fireTableRowsDeleted(int firstRow, int lastRow) {
fireTableChanged(new TableModelEvent(this, firstRow, lastRow,
TableModelEvent.ALL_COLUMNS, TableModelEvent.DELETE));
* Notifies all listeners that the value of the cell at
* <code>[row, column]</code> has been updated.
* @param row row of cell which has been updated
* @param column column of cell which has been updated
public void fireTableCellUpdated(int row, int column) {
fireTableChanged(new TableModelEvent(this, row, row, column));
* Forwards the given notification event to all
* <code>TableModelListeners</code> that registered
* themselves as listeners for this table model.
* @param e the event to be forwarded
public void fireTableChanged(TableModelEvent e) {
// Guaranteed to return a non-null array
Object[] listeners = listenerList.getListenerList();
// Process the listeners last to first, notifying
// those that are interested in this event
for (int i = listeners.length-2; i>=0; i-=2) {
if (listeners==TableModelListener.class) {
((TableModelListener)listeners[i+1]).tableChanged(e);
* Returns an array of all the objects currently registered
* as <code>FooListener</code>s
* upon this <code>AbstractTableModel</code>.
* <code>FooListener</code>s are registered using the
* <code>addFooListener</code> method.
* 
* You can specify the <code>listenerType</code> argument
* with a class literal,
* such as
* <code>FooListener.class</code>.
* For example, you can query a
* model <code>m</code>
* for its table model listeners with the following code:
* <pre>TableModelListener[] tmls = (TableModelListener[])(m.getListeners(TableModelListener.class));</pre>
* If no such listeners exist, this method returns an empty array.
* @param listenerType the type of listeners requested; this parameter
* should specify an interface that descends from
* <code>java.util.EventListener</code>
* @return an array of all objects registered as
* <code>FooListener</code>s on this component,
* or an empty array if no such
* listeners have been added
* @exception ClassCastException if <code>listenerType</code>
* doesn't specify a class or interface that implements
* <code>java.util.EventListener</code>
public EventListener[] getListeners(Class listenerType) {
return listenerList.getListeners(listenerType);
* Returns the <code>Vector</code> of <code>Vectors</code>
* that contains the table's
* data values. The vectors contained in the outer vector are
* each a single row of values. In other words, to get to the cell
* at row 1, column 5: 
* <code>((Vector)getDataVector().elementAt(1)).elementAt(5);</code>
* @return the vector of vectors containing the tables data values
public Vector getDataVector() {
return dataVector;
private static Vector nonNullVector(Vector v) {
return (v != null) ? v : new Vector();
* Replaces the current <code>dataVector</code> instance variable
* with the new Vector of rows, <code>dataVector</code>.
* <code>columnIdentifiers</code> are the names of the new
* columns. The first name in <code>columnIdentifiers</code> is
* mapped to column 0 in <code>dataVector</code>. Each row in
* <code>dataVector</code> is adjusted to match the number of
* columns in <code>columnIdentifiers</code>
* either by truncating the <code>Vector</code> if it is too long,
* or adding <code>null</code> values if it is too short.
* Note that passing in a <code>null</code> value for
* <code>dataVector</code> results in unspecified behavior,
* an possibly an exception.
* @param dataVector the new data vector
* @param columnIdentifiers the names of the columns
public void setDataVector(Vector dataVector, Vector columnIdentifiers) {
this.dataVector = nonNullVector(dataVector);
this.columnIdentifiers = nonNullVector(columnIdentifiers);
justifyRows(0, getRowCount());
fireTableStructureChanged();
* Replaces the value in the <code>dataVector</code> instance
* variable with the values in the array <code>dataVector</code>.
* The first index in the <code>Object[][]</code>
* array is the row index and the second is the column index.
* <code>columnIdentifiers</code> are the names of the new columns.
* @param dataVector the new data vector
* @param columnIdentifiers the names of the columns
public void setDataVector(Object[][] dataVector, Object[] columnIdentifiers) {
setDataVector(convertToVector(dataVector), convertToVector(columnIdentifiers));
* Equivalent to <code>fireTableChanged</code>.
* @param event the change event
public void newDataAvailable(TableModelEvent event) {
fireTableChanged(event);
// Manipulating rows
private void justifyRows(int from, int to) {
// Sometimes the MyTreeTableModel is subclassed
// instead of the AbstractTableModel by mistake.
// Set the number of rows for the case when getRowCount
// is overridden.
dataVector.setSize(getRowCount());
for (int i = from; i < to; i++) {
if (dataVector.elementAt(i) == null) {
dataVector.setElementAt(new Vector(), i);
((Vector)dataVector.elementAt(i)).setSize(getColumnCount());
* Ensures that the new rows have the correct number of columns.
* This is accomplished by using the <code>setSize</code> method in
* <code>Vector</code> which truncates vectors
* which are too long, and appends <code>null</code>s if they
* are too short.
* This method also sends out a <code>tableChanged</code>
* notification message to all the listeners.
* @param e this <code>TableModelEvent</code> describes
* where the rows were added.
* If <code>null</code> it assumes
* all the rows were newly added
public void newRowsAdded(TableModelEvent e) {
justifyRows(e.getFirstRow(), e.getLastRow() + 1);
fireTableChanged(e);
* Equivalent to <code>fireTableChanged</code>.
* @param event the change event
public void rowsRemoved(TableModelEvent event) {
fireTableChanged(event);
* Obsolete as of Java 2 platform v1.3. Please use <code>setRowCount</code> instead.
* Sets the number of rows in the model. If the new size is greater
* than the current size, new rows are added to the end of the model
* If the new size is less than the current size, all
* rows at index <code>rowCount</code> and greater are discarded. 
* @param rowCount the new number of rows
public void setNumRows(int rowCount) {
int old = getRowCount();
if (old == rowCount) {
return;
dataVector.setSize(rowCount);
if (rowCount <= old) {
fireTableRowsDeleted(rowCount, old-1);
else {
justifyRows(old, rowCount);
fireTableRowsInserted(old, rowCount-1);
* Sets the number of rows in the model. If the new size is greater
* than the current size, new rows are added to the end of the model
* If the new size is less than the current size, all
* rows at index <code>rowCount</code> and greater are discarded. 
public void setRowCount(int rowCount) {
setNumRows(rowCount);
* Adds a row to the end of the model. The new row will contain
* <code>null</code> values unless <code>rowData</code> is specified.
* Notification of the row being added will be generated.
* @param rowData optional data of the row being added
public void addRow(Vector rowData) {
insertRow(getRowCount(), rowData);
* Adds a row to the end of the model. The new row will contain
* <code>null</code> values unless <code>rowData</code> is specified.
* Notification of the row being added will be generated.
* @param rowData optional data of the row being added
public void addRow(Object[] rowData) {
addRow(convertToVector(rowData));
* Inserts a row at <code>row</code> in the model. The new row
* will contain <code>null</code> values unless <code>rowData</code>
* is specified. Notification of the row being added will be generated.
* @param row the row index of the row to be inserted
* @param rowData optional data of the row being added
* @exception ArrayIndexOutOfBoundsException if the row was invalid
public void insertRow(int row, Vector rowData) {
dataVector.insertElementAt(rowData, row);
justifyRows(row, row+1);
fireTableRowsInserted(row, row);
* Inserts a row at <code>row</code> in the model. The new row
* will contain <code>null</code> values unless <code>rowData</code>
* is specified. Notification of the row being added will be generated.
* @param row the row index of the row to be inserted
* @param rowData optional data of the row being added
* @exception ArrayIndexOutOfBoundsException if the row was invalid
public void insertRow(int row, Object[] rowData) {
insertRow(row, convertToVector(rowData));
private static int gcd(int i, int j) {
return (j == 0) ? i : gcd(j, i%j);
private static void rotate(Vector v, int a, int b, int shift) {
int size = b - a;
int r = size - shift;
int g = gcd(size, r);
for(int i = 0; i < g; i++) {
int to = i;
Object tmp = v.elementAt(a + to);
for(int from = (to + r) % size; from != i; from = (to + r) % size) {
v.setElementAt(v.elementAt(a + from), a + to);
to = from;
v.setElementAt(tmp, a + to);
* Moves one or more rows from the inlcusive range <code>start</code> to
* <code>end</code> to the <code>to</code> position in the model.
* After the move, the row that was at index <code>start</code>
* will be at index <code>to</code>.
* This method will send a <code>tableChanged</code> notification
* message to all the listeners. 
* <pre>
* Examples of moves:
* 
* 1. moveRow(1,3,5);
* a|B|C|D|e|f|g|h|i|j|k - before
* a|e|f|g|h|B|C|D|i|j|k - after
* 
* 2. moveRow(6,7,1);
* a|b|c|d|e|f|G|H|i|j|k - before
* a|G|H|b|c|d|e|f|i|j|k - after
* 
* </pre>
* @param start the starting row index to be moved
* @param end the ending row index to be moved
* @param to the destination of the rows to be moved
* @exception ArrayIndexOutOfBoundsException if any of the elements
* would be moved out of the table's range
public void moveRow(int start, int end, int to) {
int shift = to - start;
int first, last;
if (shift < 0) {
first = to;
last = end;
else {
first = start;
last = to + end - start;
rotate(dataVector, first, last + 1, shift);
fireTableRowsUpdated(first, last);
* Removes the row at <code>row</code> from the model. Notification
* of the row being removed will be sent to all the listeners.
* @param row the row index of the row to be removed
* @exception ArrayIndexOutOfBoundsException if the row was invalid
public void removeRow(int row) {
dataVector.removeElementAt(row);
fireTableRowsDeleted(row, row);
// Manipulating columns
* Replaces the column identifiers in the model. If the number of
* <code>newIdentifier</code>s is greater than the current number
* of columns, new columns are added to the end of each row in the model.
* If the number of <code>newIdentifier</code>s is less than the current
* number of columns, all the extra columns at the end of a row are
* discarded. 
* @param newIdentifiers vector of column identifiers. If
* <code>null</code>, set the model
* to zero columns
public void setColumnIdentifiers(Vector columnIdentifiers) {
setDataVector(dataVector, columnIdentifiers);
* Replaces the column identifiers in the model. If the number of
* <code>newIdentifier</code>s is greater than the current number
* of columns, new columns are added to the end of each row in the model.
* If the number of <code>newIdentifier</code>s is less than the current
* number of columns, all the extra columns at the end of a row are
* discarded. 
* @param newIdentifiers array of column identifiers.
* If <code>null</code>, set
* the model to zero columns
public void setColumnIdentifiers(Object[] newIdentifiers) {
setColumnIdentifiers(convertToVector(newIdentifiers));
* Sets the number of columns in the model. If the new size is greater
* than the current size, new columns are added to the end of the model
* with <code>null</code> cell values.
* If the new size is less than the current size, all columns at index
* <code>columnCount</code> and greater are discarded.
* @param columnCount the new number of columns in the model
public void setColumnCount(int columnCount) {
columnIdentifiers.setSize(columnCount);
justifyRows(0, getRowCount());
fireTableStructureChanged();
* Adds a column to the model. The new column will have the
* identifier <code>columnName</code>, which may be null. This method
* will send a
* <code>tableChanged</code> notification message to all the listeners.
* This method is a cover for <code>addColumn(Object, Vector)</code> which
* uses <code>null</code> as the data vector.
* @param columnName the identifier of the column being added
public void addColumn(Object columnName) {
addColumn(columnName, (Vector)null);
* Adds a column to the model. The new column will have the
* identifier <code>columnName</code>, which may be null.
* <code>columnData</code> is the
* optional vector of data for the column. If it is <code>null</code>
* the column is filled with <code>null</code> values. Otherwise,
* the new data will be added to model starting with the first
* element going to row 0, etc. This method will send a
* <code>tableChanged</code> notification message to all the listeners.
* @param columnName the identifier of the column being added
* @param columnData optional data of the column being added
public void addColumn(Object columnName, Vector columnData) {
columnIdentifiers.addElement(columnName);
if (columnData != null) {
int columnSize = columnData.size();
if (columnSize > getRowCount()) {
dataVector.setSize(columnSize);
justifyRows(0, getRowCount());
int newColumn = getColumnCount() - 1;
for(int i = 0; i < columnSize; i++) {
Vector row = (Vector)dataVector.elementAt(i);
row.setElementAt(columnData.elementAt(i), newColumn);
else {
justifyRows(0, getRowCount());
fireTableStructureChanged();
* Adds a column to the model. The new column will have the
* identifier <code>columnName</code>. <code>columnData</code> is the
* optional array of data for the column. If it is <code>null</code>
* the column is filled with <code>null</code> values. Otherwise,
* the new data will be added to model starting with the first
* element going to row 0, etc. This method will send a
* <code>tableChanged</code> notification message to all the listeners.
public void addColumn(Object columnName, Object[] columnData) {
addColumn(columnName, convertToVector(columnData));
// Implementing the TableModel interface
* Returns the number of rows in this data table.
* @return the number of rows in the model
public int getRowCount() {
return dataVector.size();
* Returns the number of columns in this data table.
* @return the number of columns in the model
public int getColumnCount() {
return columnIdentifiers.size();
* Returns the column name.
* @return a name for this column using the string value of the
* appropriate member in <code>columnIdentifiers</code>.
* If <code>columnIdentifiers</code> does not have an entry
* for this index, returns the default
* name provided by the superclass
public String getColumnName(int column) {
Object id = null;
// This test is to cover the case when
// getColumnCount has been subclassed by mistake ...
if (column < columnIdentifiers.size()) {
id = columnIdentifiers.elementAt(column);
return (id == null) ? getDefaultColumnName(column)
: id.toString();
* Returns true regardless of parameter values.
* @param row the row whose value is to be queried
* @param column the column whose value is to be queried
* @return true
public boolean isCellEditable(int row, int column) {
return true;
* Returns an attribute value for the cell at <code>row</code>
* and <code>column</code>.
* @param row the row whose value is to be queried
* @param column the column whose value is to be queried
* @return the value Object at the specified cell
* @exception ArrayIndexOutOfBoundsException if an invalid row or
* column was given
public Object getValueAt(int row, int column) {
Vector rowVector = (Vector)dataVector.elementAt(row);
return rowVector.elementAt(column);
* Sets the object value for the cell at <code>column</code> and
* <code>row</code>. <code>aValue</code> is the new value. This method
* will generate a <code>tableChanged</code> notification.
* @param aValue the new value; this can be null
* @param row the row whose value is to be changed
* @param column the column whose value is to be changed
* @exception ArrayIndexOutOfBoundsException if an invalid row or
* column was given
public void setValueAt(Object aValue, int row, int column) {
Vector rowVector = (Vector)dataVector.elementAt(row);
rowVector.setElementAt(aValue, column);
fireTableCellUpdated(row, column);
// Protected Methods
* Returns a vector that contains the same objects as the array.
* @param anArray the array to be converted
* @return the new vector; if <code>anArray</code> is <code>null</code>,
* returns <code>null</code>
protected static Vector convertToVector(Object[] anArray) {
if (anArray == null) {
return null;
Vector v = new Vector(anArray.length);
for (int i=0; i < anArray.length; i++) {
v.addElement(anArray[i]);
return v;
* Returns a vector of vectors that contains the same objects as the array.
* @param anArray the double array to be converted
* @return the new vector of vectors; if <code>anArray</code> is
* <code>null</code>, returns <code>null</code>
protected static Vector convertToVector(Object[][] anArray) {
if (anArray == null) {
return null;
Vector v = new Vector(anArray.length);
for (int i=0; i < anArray.length; i++) {
v.addElement(convertToVector(anArray[i]));
return v;

How can I display data from ResultSet to a component like jLable and JTable

hi there
My code as shown below
boolean fillTable(int type){
        try{
            //model.setRowCount(0);
            if(type == 1){
                System.out.println("line 1");
                model = new DefaultTableModel(new Object [][] {   },
                        new String[] { "\u1200 Code", "Description" });
                System.out.println("line 2");
                while(lookup.rs2.next()){
                    System.out.println("line in while");
                    model.addRow(new String[] { lookup.rs2.getString("code"),
                        "\u1201 " + lookup.rs2.getString("amdescription")});
                      //System.out.println("While : " + lookup.rs2.getString("code") + " " +
                        //      lookup.rs2.getString("amdescription"));
                lookup.rs2.last();
                String str;
                str = new String (lookup.rs2.getString("amdescription"));
                jLabel2.setText(str);
                System.out.println("line 3");
                tblLookup.setModel(model);
                System.out.println("line 4");
            else if(type == 2){
                System.out.println("line else if 1");
        }catch(Exception ex)    {
            System.out.println("Exception @ MilLookupDisplay fillTable : " + ex.getMessage());
            return false;
        return true;
    }I can read from access db and put the resultset on rs2 , it works fine
my problem is when I try to display the data ( which is amharic unicode character ) on jTable and jLabel as shown it displays '???'
besides I have checked the font by giving unicode like '\u1200' on both component displays it well
so is there something to do before trying to display unicode characters from resultSet
please I ' m waiting
thanks a lot

http://forum.java.sun.com/thread.jspa?threadID=5153938

How to enter values in JList box and JTable ???

Hi friends...
i am new to Swing
SInce i am using Netbeans IDE 5.5
and there is easy to do swing programming using this IDE
now i am confused using JTable and JList box
since i used method Insert in AWT
but how to add values in LIST BOX ( JList )
ex.
JList list = new JList( );
list.add(mystringvalue, ? );
here it ask for component so what should i write here..
when i write here this, gives error.
what to do to insert string or vector or object in JList
and to enter value in JTable
THanks

hi Ghanshyam,
i am also new to swing i was just wondering are you using the swing palette to create your interface
by the look of the code
JList list = new JList( );
list.add(mystringvalue, ? );you may not be because every JList is put in a JScrollPane
but if you do want to do it through the palette there is an option in properties - model which you can uses to add in values.
and if your looking to get info. from a database look up
AbstractListModel &
AbstractTableModel
the is a lot of info on the internet (example net beans CarTableModel) is a
good start off
happy hunting.
JJ

TAB and JTable 2

I have a JTable and I want to use the TAB botton of the key to move inside the table's cells...
I use this code:
table.addKeyListener(new KeyAdapter()
               public void keyReleased(KeyEvent e)
               if(e.getKeyCode() == KeyEvent.VK_TAB)
               System.out.println("work");
I do not have results...
How is possible???
Thank you

Why did you create a new post?
http://forum.java.sun.com/thread.jspa?threadID=5148046
And worse this time you forgot to mention that you want TAB to work from inside an editing cell.

JTextArea as ListCellRenderer in JPanel with JSplitPane and text wrapping

Hi.
I have problem with JTextArea text wrapping. The JTextArea is used as ListCellRenderer in JList and it has set:
textArea.setLineWrap(true);
textArea.setWrapStyleWord(true);I can dynamically add new Notes, modify and remove notes on JList. The capacity of the Text is various so the size of cells is various.
The JList is in JScrollPane configured like this:
JList notesList = new JList();
JScrollPane scrollPane = new JScrollPane(
                    JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,
                    JScrollPane.HORIZONTAL_SCROLLBAR_NEVER
scrollPane.setViewportView(notesList);This scrollPane is put on the left component in the JSplitPane.
When I put one note with any capacity I want, word wrapping works great even if I move the splitter. The size of cells in JList changes as I want. When JList has more width the cells have less height, when JList has less width the cells height grows because of text wrapping.
Problem
Sometimes and I don't know when and why the cells size is fixed.
I put new note to the list, JList lays the cell, calculate the size and disply it. It is good but when I move splitter the size of the cell is the same. It seems that during moving the splitter the JTextArea doesn't calculate their size.
I would like in every cell in JList to see whole text wrapped. When I make more width by slider I would like to see whole text with less number of rows. When I make less width with the slider I want to see whole text wrapped and more higher cells.
Can someone help me where to looking for ideas.

Hi.
I have problem with JTextArea text wrapping. The JTextArea is used as ListCellRenderer in JList and it has set:
textArea.setLineWrap(true);
textArea.setWrapStyleWord(true);I can dynamically add new Notes, modify and remove notes on JList. The capacity of the Text is various so the size of cells is various.
The JList is in JScrollPane configured like this:
JList notesList = new JList();
JScrollPane scrollPane = new JScrollPane(
                    JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,
                    JScrollPane.HORIZONTAL_SCROLLBAR_NEVER
scrollPane.setViewportView(notesList);This scrollPane is put on the left component in the JSplitPane.
When I put one note with any capacity I want, word wrapping works great even if I move the splitter. The size of cells in JList changes as I want. When JList has more width the cells have less height, when JList has less width the cells height grows because of text wrapping.
Problem
Sometimes and I don't know when and why the cells size is fixed.
I put new note to the list, JList lays the cell, calculate the size and disply it. It is good but when I move splitter the size of the cell is the same. It seems that during moving the splitter the JTextArea doesn't calculate their size.
I would like in every cell in JList to see whole text wrapped. When I make more width by slider I would like to see whole text with less number of rows. When I make less width with the slider I want to see whole text wrapped and more higher cells.
Can someone help me where to looking for ideas.

JSplitPane and Jtree

Hi all,
in my window I've got a JSplitPane with the left component that is a JScrollPane with a Jtree (used as a menu), while in the right side a customized JPanel that changes depending on the selection in the tree on the left.
My panels are initially created as follows:
     this.splitter = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT);
     this.splitter.setOneTouchExpandable(true);
JScrollPane leftPanel = new JScrollPane( this.menuTree );
          leftPanel.setMinimumSize( new Dimension(300,300) );
          leftPanel.setMaximumSize(leftPanel.getMinimumSize());
          // add the leftt and right panels
          this.splitter.setLeftComponent( leftPanel );
          this.imagePanel = new ImagePanel(ComponentBuilder.getLogoPath());
          this.rightPanel = this.imagePanel;
          this.splitter.setRightComponent(this.rightPanel);
          // add the splitter to myself
          this.add(new JScrollPane(this.splitter));where the imagepanel is a working panel that shows the project logo. Now what happens is that:
1) the logo is cutted to a size I don't know how is calculated, since the image panel is working fine (if I place on a separate window I can see the image right)
2) most important when a user selects something in the tree on the left panel, so the right panel changes, the left panel is moved around the window depending on the size of the right panel.
Is it possible to fix the left panel not only as size, but also in the position of the window, thus the remaining part of the window will be occupied by the right panel without moving the left one? In my frame I'm using a BorderLayout, and the panel containing the splitpane is set at the center (no components on the right and on the left).
Thanks,
Luca

Thanks for your reply, but the only thing I noticed is that the code you're showing works a little more with sizes, that is something I've already tried. By the way, the following is a running example that loads a tree/menu and the logo.png image.
Any idea about its behaviour?
Thanks,
Luca
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.tree.*;
import javax.swing.event.*;
import java.util.*;
import java.awt.image.*;
class ImagePanel extends JPanel implements ImageObserver
     * The image to display
    protected Image image=null;
     * This flag indicates if the image is complete or not.
    protected boolean isComplete=false;
     * The dimension of the panel.
    protected int width=0,height=0;
     * This is the message to display during loading.
    protected String message="Loading...";
     * Default constructor.
     * @param image the image object.
    public ImagePanel(Image image)
          super();
          this.image=image;
     * Overloaded constructor. It try to load the image itself. You should use
     * this to avoid image flicking problems. This method use all the
     * capabilities of the ImageObserver.
     * @param image the image file name
    public ImagePanel(String image) {
          super();
          /* now load the image */
          Toolkit tk=Toolkit.getDefaultToolkit();
          this.image=tk.getImage(image);
          /* use the media tracker to wait untill the image is not loaded */
          try{
              MediaTracker tracker=new MediaTracker(this);
              tracker.addImage(this.image,0);
              tracker.waitForID(0);
              this.isComplete=true;
              /* now that the image is fully loaded I need to resize the panel to
              the size of the image */
              this.width=this.image.getWidth(this);
              this.height=this.image.getHeight(this);
              this.setSize(width,height);
              this.setMinimumSize(getSize());
              this.setMaximumSize(getSize());
              this.setVisible(true);
          catch(InterruptedException e){
              this.message="Exception during loading process!";
              this.isComplete=false;
     * Draw the image.
    public void paint(Graphics device)   {
          super.paint(device);
          if(this.isComplete==true)     {
              device.drawImage(this.image,0,0,this.width,this.height,this);
          else     {
              device.setColor(Color.RED);
              device.drawString(this.message,20,20);
     * The update image method. This method is called for every update and or
     * error.
    public boolean imageUpdate(Image image,int infoFlags, int x, int y,
                    int width, int height)
          if((infoFlags & ALLBITS)==0)
              /* the image is complete */
              this.isComplete=true;
              repaint();
              this.setVisible(true);
              return false;
          else
          if((infoFlags & ERROR)==0 || (infoFlags & ABORT)==0 )
              /* error or abort */
              this.isComplete=false;
              this.message="Error during load process (or abort)";
              this.repaint();
              return true;
          else
          if((infoFlags & SOMEBITS)==0)
              /* some other data loaded, show the loading process percent */
              int originalWidth=this.image.getWidth(this);
              int originalHeight=this.image.getHeight(this);
              int currentWidth=image.getWidth(this);
              int currentHeight=image.getHeight(this);
              /* now calculate the total of pixels */
              long originalTotal=originalWidth*originalHeight;
              long currentTotal=currentWidth*currentHeight;
              /* now calculate the percent */
              float percent=(float)currentTotal/(float)originalTotal *100;
              /* set the string */
              this.message="Loading progress: "+(int)percent+" % done";
              this.repaint();
              return true;
          return true;
public class MainPanel extends JPanel {
      * The split pane used for this panel.
     protected JSplitPane splitter = null;
      * The menu tree of this panel.
     protected JTree menuTree = null;
      * The parentFrame frame of this panel
     protected JFrame parentFrame = null;
      * The panel on the right of the window.
     protected JComponent rightPanel = null;
      * The menuTreeRoot node of the menu.
     protected DefaultMutableTreeNode menuTreeRoot = null;
      * The action menu of the JFrame that contains this panel. Such menu is changed depending on the panel
      * shown on the right panel.
     protected JMenu actionMenu = null;
      * The image panel with the image of the logo.
     protected ImagePanel imagePanel = null;
     public final String ROOT_STRING = "Gestione delle risorse umane";
     public final String LEVEL1A_STRING = "Parametrizzazione";
     public final String LEVEL2AA_STRING = "Competenze & Famiglie di competenze";
     public final String LEVEL2AB_STRING = "Gestione dei ruoli";
     public final String LEVEL2AC_STRING = "Associazione ruolo-competenza";
     public final String LEVEL1B_STRING   = "Varie";
     public final String LEVEL2BB_STRING = "Province";
     public final String LEVEL2BC_STRING = "Citta'";
     public final String LEVEL2BD_STRING = "Livelli di istruzione";
     public final String LEVEL2BE_STRING = "Livelli di competenza";
     public final String LEVEL3A_STRING   = "Personale";
     public final String LEVEL3AA_STRING = "Anagrafica di base";
     public final String LEVEL3AB_STRING = "Ruoli, Competenze e Gradi di Istruzione";
     public final String LEVEL3AC_STRING = "Storia delle valutazioni delle competenze";
     public final String LEVEL3AD_STRING = "Valutazione";
      * Default constructor.
      * @param parentFrame the jframe that contains this panel
     public MainPanel(JFrame parent, JMenu actionMenu){
          super();
          this.parentFrame = parent;
          this.initGUI();
          this.actionMenu = actionMenu;
      * Shows the components on the main panel.
     public synchronized void initGUI(){
          // create the split pane
          this.splitter = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT);
          this.splitter.setOneTouchExpandable(true);
          //this.splitter.setResizeWeight(0);                    // the right panel gets all the extra space
          // create the left panel with the tree
          DefaultMutableTreeNode root = new DefaultMutableTreeNode(ROOT_STRING);
               DefaultMutableTreeNode level1a = new DefaultMutableTreeNode(LEVEL1A_STRING);
                    ContainerTreeNode level2aa = new ContainerTreeNode(LEVEL2AA_STRING);     // skills and families
               DefaultMutableTreeNode level2ab = new DefaultMutableTreeNode(LEVEL2AB_STRING);
                    DefaultMutableTreeNode level2ac = new DefaultMutableTreeNode(LEVEL2AC_STRING);
               DefaultMutableTreeNode level1b = new DefaultMutableTreeNode(LEVEL1B_STRING);
                    DefaultMutableTreeNode level2bb = new DefaultMutableTreeNode(LEVEL2BB_STRING);
                    DefaultMutableTreeNode level2bc = new DefaultMutableTreeNode(LEVEL2BC_STRING);
                    DefaultMutableTreeNode level2bd = new DefaultMutableTreeNode(LEVEL2BD_STRING);
                    DefaultMutableTreeNode level2be = new DefaultMutableTreeNode(LEVEL2BE_STRING);
               DefaultMutableTreeNode level3a = new DefaultMutableTreeNode(LEVEL3A_STRING);
                    DefaultMutableTreeNode level3aa = new DefaultMutableTreeNode(LEVEL3AA_STRING);
                    DefaultMutableTreeNode level3ab = new DefaultMutableTreeNode(LEVEL3AB_STRING);
                    DefaultMutableTreeNode level3ac = new DefaultMutableTreeNode(LEVEL3AC_STRING);
                    DefaultMutableTreeNode level3ad = new DefaultMutableTreeNode(LEVEL3AD_STRING);
          // create the tree
          this.menuTreeRoot = root;
          level2ab.add(level2ac);
          level1a.add(level2aa);
          level1b.add(level2bc);
          level1b.add(level2bb);
          level1b.add(level2bd);
          level1b.add(level2be);
          level3a.add(level3aa);
          level3a.add(level3ab);
          level3a.add(level3ac);
          level3a.add(level3ad);
          root.add(level3a);
          root.add(level2ab);
          root.add(level1a);
          root.add(level1b);
          this.menuTree = new JTree(root);
          this.menuTree.setSize(200,200);
          JScrollPane leftPanel = new JScrollPane( this.menuTree );
          leftPanel.setMinimumSize( new Dimension(300,300) );     // it does not affects the dimension, but avoid to resize the left panel
          leftPanel.setMaximumSize(leftPanel.getMinimumSize());
          // add the leftt and right panels
          this.splitter.setLeftComponent( leftPanel );
          this.imagePanel = new ImagePanel("logo.png");
          this.rightPanel = this.imagePanel;
          this.rightPanel.setSize(400,400);
          this.splitter.setRightComponent(this.rightPanel);
          // add the splitter to myself
          this.add(new JScrollPane(this.splitter));
     public static void main(String argv[]){
         JFrame f = new JFrame();
         f.setSize(400,400);
         f.add(new MainPanel(f,null));
         f.setVisible(true);
}

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