Single click to edit a JTable Cell

开发者_如何学Go

currently the JTable cell is selected on first click, and on the second one it is edited.

Is it possible to directly edit it on the first click?

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In the DefaultCellEditor api there is a method named setClickCountToStart

    DefaultCellEditor singleclick = new DefaultCellEditor(new JTextField());
    singleclick.setClickCountToStart(1);

    //set the editor as default on every column
    for (int i = 0; i < table.getColumnCount(); i++) {
        table.setDefaultEditor(table.getColumnClass(i), singleclick);
    } 

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The posted answer regarding extending DefaultCellEditor does work, and I have used it, except that on changing our application's Look&Feel to Nimbus, the thicker default JTextField border encroaches into the table cell making the text within unreadable.

The reason is that the default table cell editor is JTable$GenericEditor not DefaultCellEditor (of which it is a direct subclass) and the former has the following crucial line in getTableCellEditorComponent():

((JComponent)getComponent()).setBorder(new LineBorder(Color.black));

JTable$GenericEditor is package private so can't be subclassed, but JTable provides a getDefaultEditor() method, so all I do is:

((DefaultCellEditor) myJTable.getDefaultEditor(Object.class)).setClickCountToStart(1);

or if you wanted to cater for all possible columnClasses in your table (in case one of your columns was a Number for example):

for (int i = 0; i < myJTable.getColumnModel().getColumnCount(); i++) {
    final DefaultCellEditor defaultEditor = (DefaultCellEditor) myJTable.getDefaultEditor(myJTable.getColumnClass(i));
    defaultEditor.setClickCountToStart(1);
}

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UsesetClickCountToStart(1) on the cell editor.