JMoney com 3 casas decimais

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 * and open the template in the editor.
 */

package Public;


import java.awt.event.FocusAdapter;   
import java.awt.event.FocusEvent;   
  
import javax.swing.JFormattedTextField;   
import javax.swing.JTextField;   
import javax.swing.event.CaretEvent;   
import javax.swing.event.CaretListener;   
import javax.swing.text.AttributeSet;   
import javax.swing.text.BadLocationException;   
import javax.swing.text.PlainDocument;   
import javax.swing.text.SimpleAttributeSet;   

 
/**  
* Component JMoneyField  
* @author Dyorgio da Silva Nascimento  
*/   
public class JMoneyField extends JFormattedTextField {   
       
    private static final long serialVersionUID = -5712106034509737967L;   
    private static final SimpleAttributeSet nullAttribute = new SimpleAttributeSet();   
       
    /**  
     * Creates a new instance of JMoneyField  
     */   
    public JMoneyField() {   
        this.setHorizontalAlignment( JTextField.CENTER );   
        this.setDocument(new MoneyFieldDocument());   
        this.addFocusListener(new MoneyFieldFocusListener());   
        this.setText("0,00");   
        this.addCaretListener(new CaretListener(){   
            public void caretUpdate(CaretEvent e) {   
                if (e.getDot() != getText().length() ) {   
                    getCaret().setDot(getText().length());   
                }   
            }   
        });   
    }   
       
    private final class MoneyFieldFocusListener extends FocusAdapter{   
        public void focusGained(FocusEvent e) {   
            selectAll();   
        }   
    }   
       
    private final class MoneyFieldDocument extends PlainDocument {   
           
        /**  
         *  
         */   
        private static final long serialVersionUID = -3802846632709128803L;   
  
        public void insertString(int offs, String str, AttributeSet a) throws BadLocationException {   
            String original = getText(0,getLength());   
               
            // Permite apenas digitar até 16 caracteres (9.999.999.999,99)   
            if (original.length()<16) {   
                StringBuffer mascarado = new StringBuffer();   
                if (a != nullAttribute) {   
                    //limpa o campo   
                    remove(-1,getLength());   
                       
                    mascarado.append((original+str).replaceAll("[^0-9]",""));   
                    for (int i = 0; i < mascarado.length(); i++){   
                        if (!Character.isDigit(mascarado.charAt(i))){   
                            mascarado.deleteCharAt(i);   
                        }   
                    }   
                    Long number = new Long(mascarado.toString());   
                       
                    mascarado.replace(0, mascarado.length(), number.toString());   
                       
                    if ( mascarado.length() < 3 )   
                    {   
                        if ( mascarado.length() == 1 ) {   
                            mascarado.insert(0,"0");   
                            mascarado.insert(0,",");   
                            mascarado.insert(0,"0");   
                        }else if ( mascarado.length() == 2 ) {   
                            mascarado.insert(0,",");   
                            mascarado.insert(0,"0");   
                        }   
                    }else{   
                        mascarado.insert(mascarado.length()-2,",");   
                    }   
                       
                    if ( mascarado.length() > 6 ) {   
                        mascarado.insert(mascarado.length()-6, '.');   
                        if (mascarado.length() > 10 ) {   
                            mascarado.insert(mascarado.length()-10, '.');   
                            if (mascarado.length() > 14 ) {   
                                mascarado.insert(mascarado.length()-14, '.');   
                            }   
                        }   
                    }   
                    super.insertString(0, mascarado.toString(), a);   
                }else{   
                    if (original.length() == 0){   
                        super.insertString(0, "0,00", a);   
                    }   
                }   
            }   
        }   
           
        @Override   
        public void remove(int offs, int len) throws BadLocationException {   
            if ( len == getLength() ) {   
                super.remove(0, len);   
                if (offs != -1){   
                    insertString(0, "",nullAttribute);   
                }   
            }else{   
                String original = getText(0, getLength()).substring(0, offs) + getText(0, getLength()).substring(offs+len);   
                super.remove(0, getLength());   
                insertString(0,original,null);   
            }   
        }   
    }   
}