问题
I have been making a small application containing JTable. The question is this: when I am adding the JTable to the JScrollPane, it is giving me the error that the table component is added to a parent component more than once.
getContentPane().add(new JScrollPane(table));
scrollPane.setViewportView(table);
I see the problem but could not solve it. Any suggestions?
public thirdFrame() {
thirdFrame = new JFrame();
thirdFrame.setFont(new Font("David", Font.BOLD, 17));
thirdFrame.setTitle("MGMSportif");
thirdFrame.setIconImage(Toolkit.getDefaultToolkit().getImage("C:\\Users\\EXP\\Desktop\\mgm\\src\\MGM-LOGO.png"));
thirdFrame.setBounds(100, 100, 1600, 620);
thirdFrame.setVisible(true);
thirdFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
thirdFrame.getContentPane().setLayout(null);
JDesktopPane desktop = new JDesktopPane();
desktop.setOpaque(true);
thirdFrame.getContentPane().add(desktop);
JInternalFrame internalFrame = new JInternalFrame("MGMSportif ",false,true,false,true);
internalFrame.setFrameIcon(new ImageIcon("C:\\Users\\EXP\\Desktop\\mgm\\src\\reized logo.png"));
internalFrame.setBounds(209, 126, 720, 400);
JToolBar toolBar = new JToolBar();
toolBar.setBounds(0, 0, 1362, 32);
thirdFrame.getContentPane().add(toolBar);
JButton bt = new JButton("");
bt.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));
bt.setToolTipText("Dosya a\u00E7mak i\u00E7in t\u0131klay\u0131n");
bt.setIcon(new ImageIcon("C:\\Users\\EXP\\Desktop\\mgm\\src\\open-file-icon.png"));
toolBar.add(bt);
JButton bt1 = new JButton("");
bt1.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
Save sF =new Save();
sF.setVisible(false);
dispose();
}
});
bt1.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));
bt1.setToolTipText("Kay\u0131d etmek i\u00E7in t\u0131klay\u0131n");
bt1.setIcon(new ImageIcon("C:\\Users\\EXP\\Desktop\\mgm\\src\\save.png"));
toolBar.add(bt1);
JButton bt2 = new JButton("");
bt2.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));
bt2.setToolTipText("Kesmek i\u00E7in t\u0131klay\u0131n");
bt2.setIcon(new ImageIcon("C:\\Users\\EXP\\Desktop\\mgm\\src\\Cut-icon.png"));
toolBar.add(bt2);
JButton bt3 = new JButton("");
bt3.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));
bt3.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
internalFrame.setVisible(true);
}
});
thirdFrame.getContentPane().add(internalFrame);
internalFrame.getContentPane().setLayout(null);
JLabel lb = new JLabel("Tarihe g\u00F6re ara");
lb.setFont(new Font("Tahoma", Font.PLAIN, 13));
lb.setBounds(10, 11, 110, 26);
internalFrame.getContentPane().add(lb);
tF = new JTextField();
tF.setToolTipText("Aramak isteyen tarihi giriniz");
tF.setBounds(144, 16, 445, 20);
internalFrame.getContentPane().add(tF);
tF.setColumns(10);
JProgressBar pBar = new JProgressBar(0,100);
pBar.setString("");
pBar.setStringPainted(true);
pBar.setBounds(10, 67, 684, 21);
internalFrame.getContentPane().add( pBar);
JButton sesarchButton = new JButton("");
sesarchButton.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));
sesarchButton.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
sesarchButton.setEnabled(false);
setCursor(Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR));
pBar.setVisible(true);
repaint();
for(int i=0;i<=100;i++){
final int percent = i;
pBar.setValue(i);
// jProgressBar1.setIndeterminate(false);
try{
pBar.paintImmediately(0, 0, 100, 100);//0, 1, 100, 10
Thread.sleep(100);
pBar.setStringPainted(true);
} catch (InterruptedException err){}
}
}
});
sesarchButton.setIcon(new ImageIcon("C:\\Users\\EXP\\Desktop\\mgm\\src\\search48.png"));
sesarchButton.setBounds(599, 7, 57, 56);
internalFrame.getContentPane().add(sesarchButton);
JLabel lb1 = new JLabel("Makineye g\u00F6re ara");
lb1.setFont(new Font("Tahoma", Font.PLAIN, 13));
lb1.setBounds(10, 43, 124, 20);
internalFrame.getContentPane().add( lb1);
tF1 = new JTextField();
tF1 .setBounds(144, 42, 445, 20);
internalFrame.getContentPane().add(tF1 );
tF1 .setColumns(10);
tF1 .setBounds(144, 42, 445, 20);
JList list = new JList();
list.setBounds(10, 99, 684, 360);
internalFrame.getContentPane().add(list);
bt3.setToolTipText("Dosya aramak i\u00E7in t\u0131klay\u0131n");
bt3.setIcon(new ImageIcon("C:\\Users\\EXP\\Desktop\\mgm\\src\\Zoom-icon.png"));
toolBar.add( bt3);
JButton bt4 = new JButton("");
ActionListener printAction = new ActionListener() {
public void actionPerformed(ActionEvent e) {
try {
MessageFormat headerFormat = new MessageFormat("Page {0}");
MessageFormat footerFormat = new MessageFormat("- {0} -");
table.print(JTable.PrintMode.FIT_WIDTH, headerFormat, footerFormat);
} catch (PrinterException pe) {
System.err.println("Error printing: " + pe.getMessage());
}
}
};
bt4.addActionListener(printAction);
bt4.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));
bt4.setToolTipText("\u00C7\u0131kt\u0131 almak i\u00E7in t\u0131klay\u0131n");
bt4.setIcon(new ImageIcon("C:\\Users\\EXP\\Desktop\\mgm\\src\\print-icon16.png"));
toolBar.add(bt4);
JButton bt5 = new JButton("");
bt5.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));
bt5.setToolTipText("Pencereyi kapatmak i\u00E7in t\u0131klay\u0131n");
bt5.setIcon(new ImageIcon("C:\\Users\\EXP\\Desktop\\mgm\\src\\Close.png"));
toolBar.add(bt5);
JCheckBox checkBox = new JCheckBox("Enjeksyon Makine No:");
checkBox.addItemListener(new ItemListener() {
@Override
public void itemStateChanged(ItemEvent e) {
if(e.getStateChange() == ItemEvent.SELECTED){
tF2.setEnabled(true);
}
else if(e.getStateChange() == ItemEvent.DESELECTED){
tF2.setEnabled(false);
}
}
});
checkBox.setFont(new Font("Tahoma", Font.PLAIN, 11));
checkBox.setBounds(1015, 39, 131, 23);
thirdFrame.getContentPane().add(checkBox);
tF2 = new JTextField();
tF2.setBounds(1152, 43, 31, 19);
thirdFrame.getContentPane().add( tF2);
tF2.setColumns(10);
JCheckBox checkBox1 = new JCheckBox("Kaynak Makine No:");
checkBox1.addItemListener(new ItemListener() {
@Override
public void itemStateChanged(ItemEvent e) {
if(e.getStateChange() == ItemEvent.SELECTED){
tF3.setEnabled(true);
tF3.setText("");
}
else if(e.getStateChange() == ItemEvent.DESELECTED){
tF3.setEnabled(false);
tF3.setText("");
}
}
});
checkBox1.setFont(new Font("Tahoma", Font.PLAIN, 11));
checkBox1.setBounds(337, 39, 117, 23);
thirdFrame.getContentPane().add(checkBox1);
tF3 = new JTextField();
tF3.setBounds(460, 43, 31, 19);
thirdFrame.getContentPane().add(tF3);
tF3.setColumns(10);
JCheckBox checkBox2 = new JCheckBox("Otomatsyon Makine No:");
checkBox2.addItemListener(new ItemListener() {
@Override
public void itemStateChanged(ItemEvent e) {
if(e.getStateChange() == ItemEvent.SELECTED){
tF4.setEnabled(true);
tF4.setText("");
}
else if(e.getStateChange() == ItemEvent.DESELECTED){
tF4.setEnabled(false);
tF4.setText("");
}
}
});
checkBox2.setFont(new Font("Tahoma", Font.PLAIN, 11));
checkBox2.setBounds(577, 39, 141, 23);
thirdFrame.getContentPane().add(checkBox2);
tF4 = new JTextField();
tF4.setBounds(724, 43, 31, 19);
thirdFrame.getContentPane().add(tF4);
tF4.setColumns(10);
JCheckBox checkBox3 = new JCheckBox("Pakitleme:");
checkBox3.setFont(new Font("Tahoma", Font.PLAIN, 11));
checkBox3.addItemListener(new ItemListener() {
public void itemStateChanged(ItemEvent e) {
if(e.getStateChange() == ItemEvent.SELECTED){
tF5.setEnabled(true);
tF5.setText("");
}
else if(e.getStateChange() == ItemEvent.DESELECTED){
tF5.setEnabled(false);
tF5.setText("");
}
}
});
checkBox3.setBounds(844, 39, 85, 23);
thirdFrame.getContentPane().add(checkBox3);
tF5 = new JTextField();
tF5.setBounds(934, 43, 31, 19);
thirdFrame.getContentPane().add(tF5);
tF5.setColumns(10);
JLabel lb2 = new JLabel(" Vardiya 1 Vardiya 2");
lb2.setForeground(SystemColor.desktop);
lb2.setFont(new Font("Tahoma", Font.PLAIN, 13));
lb2.setBounds(0, 73, 1341,16);
thirdFrame.getContentPane().add(lb2);
JSeparator separator = new JSeparator();
separator.setBounds(0, 69, 1362, 2);
thirdFrame.getContentPane().add(separator);
JLabel lblNewLabel = new JLabel("TOSCOW");
lblNewLabel.setFont(new Font("Tahoma", Font.BOLD, 15));
lblNewLabel.setBounds(108, 43, 97, 19);
thirdFrame.getContentPane().add(lblNewLabel);
String[] col = new String[] {
"TAR\u0130H", "BEYAZ", "KIRMIZI", "MAV\u0130", "SARI", "S\u0130YAH", "New column", "ADET", "PERS.", "\u00DCR.NEDEN\u0130", "Toplam", "TAR\u0130H", "BEYAZ", "KIRMIZI", "MAV\u0130", "SARI", "S\u0130YAH","New column", "ADET", "PERS.", "\u00DCR.NEDEN\u0130", "Toplam", "2VDT"
};
Object[][] data = new Object[][] {
{null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null},
{null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null},
{null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null},
{null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null},
{null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null},
{null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null},
{null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null},
{null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null},
};
JTable table = new JTable(data, col);
add(new JScrollPane(table));
JScrollPane scrollPane = new JScrollPane();
scrollPane.setBounds(20, 94, 1324, 455);
thirdFrame.getContentPane().add(scrollPane);
scrollPane.setViewportView(table);
// header
header = table.getTableHeader();
header.addMouseListener(new MouseAdapter(){
@Override
public void mouseClicked(MouseEvent event)
{
if (event.getClickCount() == 2)
{
editColumnAt(event.getPoint());
}
}
});
text = new JTextField();
text.setBorder(null);
text.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e)
{
renameColumn();
}
});
renamePopup = new JPopupMenu();
renamePopup.setBorder(new MatteBorder(0, 1, 1, 1, Color.DARK_GRAY));
renamePopup.add(text);
}
private void editColumnAt(Point p)
{
int columnIndex = header.columnAtPoint(p);
if (columnIndex != -1)
{
column = header.getColumnModel().getColumn(columnIndex);
Rectangle columnRectangle = header.getHeaderRect(columnIndex);
text.setText(column.getHeaderValue().toString());
renamePopup.setPreferredSize(
new Dimension(columnRectangle.width, columnRectangle.height - 1));
renamePopup.show(header, columnRectangle.x, 0);
text.requestFocusInWindow();
text.selectAll();
}
}
private void renameColumn()
{
column.setHeaderValue(text.getText());
renamePopup.setVisible(false);
header.repaint();
}
}
回答1:
The error is correct: a JScrollPane can only have one "scrollable client (aka data model) displayed by the JViewport view." You only need setViewportView() if you "don't provide the view directly to the JScrollPane constructor."
JTable table = new JTable(data, col);
add(new JScrollPane(table));
As an aside, don't use setBounds() in this way. Instead, override the Scrollable interface method getPreferredScrollableViewportSize() and pack() the enclosing window, as shown here.
JTable table = new JTable(model) {
@Override
public Dimension getPreferredScrollableViewportSize() {
return new Dimension(1024, 512);
}
};
add(new JScrollPane(table));
pack();
回答2:
JTable table = new JTable();
JScrollPane scrollPane = new JScrollPane(table);
JFrame frame = new JFrame();
frame.add(scrollPane);
Should work perfectly.
来源：https://stackoverflow.com/questions/32459061/adding-jtable-to-jscrollpane