Java SE (Java Platform, Standard Edition)

hi

I need to assign number formatting to a JFormattedTextField
(to define decimal digit and localization for the currency).

I was able to solve this problem if I assign formatting when the JFormattedTextFieldis created:

import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.text.NumberFormat;
import java.util.Locale;
import javax.swing.JButton;
import javax.swing.JFormattedTextField;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.text.DefaultFormatterFactory;
import java.awt.event.ActionListener;
import javax.swing.JOptionPane;
import javax.swing.JFormattedTextField.AbstractFormatterFactory;
import javax.swing.text.NumberFormatter;

/**
 *
 *
 */
public classTestTheNumFormatProblem {
    
    /** Creates a new instance of testTheNumFormatProblem */
    public TestTheNumFormatProblem() {
    }
    
    public static void main(String args[]) {
        Finestra finestra = new Finestra();
    }
}  // class testTheNumFormatProblem

class Finestra extends JFrame{
    JLabel jl;
    JFormattedTextField jft ;
    JButton jb = new JButton("but");
    public Finestra(){
        setLayout(new FlowLayout());
        jl = new JLabel("Try with formatted text field   ");
        jft = setFormat(jft);
        add(jb);
        //
        add(jl);
        add(jft);
        jft.setColumns(10);
        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        setSize(400,300);
        setVisible(true);
        jb.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(ActionEvent e) {
                JOptionPane.showMessageDialog(jb, "nel text Box : " + jft.getText());
            }
        });
    }
    
    private JFormattedTextField setFormat(JFormattedTextField jft ){
        DefaultFormatterFactory aff ;
        NumberFormat numberFormat;
//        Locale local = new Locale("it", "IT");
        Locale local = new Locale("en", "US");
        
        numberFormat = NumberFormat.getCurrencyInstance(local);
        numberFormat.setMinimumFractionDigits(3);
        jft = new JFormattedTextField(numberFormat);
        jft.setValue(new Double(342.796));
        return jft;
    }
}

*But I have to assign formatting after the JFormattedTextField is already created... *
(using some method like jFormattedTextField.setFormatterFactory(... )

In this case i am not able to do the program work good..

Any help or explanation to assign formatting in dynamic way is welcome

thank you

regards

tonyMrsangelo