Java Swing jtable cell editor doubles E numbers

Hi I an issue with editors in a JTable.

I have a column which displays data as 26,687,489,800.00 ie: Double.

When the user clicks the cell to edi开发者_如何学编程t the data it is displayed as -2.66874908E10.

I want the data to be edited as it appears when it is displayed ie: 26,687,489,800.00 - without the E10 etc...

Any help would be appreciated.

Mike

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You should employ a DecimalFormat instance to format your value correctly when you setup your editor.

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The component used as editor is completely different from the one used to display data (the renderer). This is why you have difference of format between the two of them.

I recommend you to read this part of the Java tutorial, about adding your own cell editor. You should add a Formatted text field, to which you would put the number format you need.

Example:

DecimalFormat df = new DecimalFormat ("#,##0.######"); //you shouldn't need more "#" to the left
JFormattedTextField fmtTxtField = new JFormattedTextField(df);
TableCellEditor cellEditor = new DefaultCellEditor(fmtTxtField);

//This depends on how you manage your cell editors. This is for the whole table, not column specific
table.setCellEditor(cellEditor); 

---

If we consider that your column is of class Double you can do the following:

DecimalFormat df = new DecimalFormat ("#,##0.######");
JFormattedTextField fmtTxtField = new JFormattedTextField(df);
TableCellEditor cellEditor = new DefaultCellEditor(fmtTxtField);
table.setDefaultEditor(Double.class, new DefaultCellEditor(fmtTxtField));

but you need to overwrite the default delegate implementation of DefaultCellEditor. (At least in Java6)

//DEFAULT IMPLEMENTATION INSIDE THE CONSTRUCTOR
....
public DefaultCellEditor(final JTextField textField) {
    editorComponent = textField;
    this.clickCountToStart = 2;
    delegate = new EditorDelegate() {
        public void setValue(Object value) {
            textField.setText((value != null) ? value.toString() : "");
        }

        public Object getCellEditorValue() {
            return textField.getText();
        }
    };
textField.addActionListener(delegate);
}
....

//YOUR IMPLEMENTATION
public class DoublesCellEditor extends DefaultCellEditor {

    private JFormattedTextField textField;

    public DoublesCellEditor(JFormattedTextField jft) {
        super(jft);
        this.textField = jft;
        super.delegate = new EditorDelegate() {
            public void setValue(Object value) {
                textField.setValue(value != null ? ((Number) value).doubleValue() : value);
            }

            public Object getCellEditorValue() {
                Object value = textField.getValue();
                return value != null ? ((Number) value).doubleValue() : value;
            }
        };
    }
}

And instead use:

table.setDefaultEditor(Double.class, new DoublesCellEditor(fmtTxtField));