JTable cell editor number format

Question

I need to show numbers in jTable with exact 2 decimal places. To accomplish this I have created a custom cell editor as:

public class NumberCellEditor extend         


        

Answer 1

Try

DecimalFormat numberFormat = new DecimalFormat("\\d*([\\.,\\,]\\d{0,2})?");

Answer 2

Just change #,###,###,##0.00 with #.###.###.##0,00

Answer 3

for example

import java.text.NumberFormat;
import java.math.RoundingMode;
import javax.swing.table.DefaultTableCellRenderer;


public class SubstDouble2DecimalRenderer extends DefaultTableCellRenderer {

    private static final long serialVersionUID = 1L;
    private int precision = 0;
    private Number numberValue;
    private NumberFormat nf;

    public SubstDouble2DecimalRenderer(int p_precision) {
        super();
        setHorizontalAlignment(javax.swing.SwingConstants.RIGHT);
        precision = p_precision;
        nf = NumberFormat.getNumberInstance();
        nf.setMinimumFractionDigits(p_precision);  
        nf.setMaximumFractionDigits(p_precision);
        nf.setRoundingMode(RoundingMode.HALF_UP);  
    }

    public SubstDouble2DecimalRenderer() {
        super();
        setHorizontalAlignment(javax.swing.SwingConstants.RIGHT);
        nf = NumberFormat.getNumberInstance();
        nf.setMinimumFractionDigits(2);
        nf.setMaximumFractionDigits(2);
        nf.setRoundingMode(RoundingMode.HALF_UP);
    }

    @Override
    public void setValue(Object value) {
        if ((value != null) && (value instanceof Number)) {
            numberValue = (Number) value;
            value = nf.format(numberValue.doubleValue());
        }
        super.setValue(value);
    }
}

Answer 4

Use the locale to your advantage:

  //Locale myLocale = Locale.GERMANY;  //... or better, the current Locale

  Locale myLocale = Locale.getDefault(); // better still

  NumberFormat numberFormatB = NumberFormat.getInstance(myLocale);
  numberFormatB.setMaximumFractionDigits(2);
  numberFormatB.setMinimumFractionDigits(2);
  numberFormatB.setMinimumIntegerDigits(1);

  edit.setFormatterFactory(new javax.swing.text.DefaultFormatterFactory(
                    new NumberFormatter(numberFormatB)));