JTextField txtFld = new JTextField();
Document doc = txtFld.getDocument();
doc.addDocumentListener(new javax.swing.event.DocumentListener() {
public void insertUpdate(DocumentEvent documentEvent) {}
public void removeUpdate(DocumentEvent documentEvent) {
txtFld_counter_changedUpdate();
}
public void changedUpdate(DocumentEvent documentEvent) { txtFld_counter_changedUpdate();
}
});
Document doc = txtFld.getDocument();
doc.addDocumentListener(new javax.swing.event.DocumentListener() {
public void insertUpdate(DocumentEvent documentEvent) {}
public void removeUpdate(DocumentEvent documentEvent) {
txtFld_counter_changedUpdate();
}
public void changedUpdate(DocumentEvent documentEvent) { txtFld_counter_changedUpdate();
}
});
doc.addDocumentListener(this),主类实现DocumentListener接口即可,不过我还是非常感谢您的支持