这是我的部分代码:按钮Register里的事件应该怎么写啊?
btAdd3.setOnAction(new EventHandler<ActionEvent>() {
@Override
public void handle(ActionEvent event) {
FileChooser fileChooser = new FileChooser();
FileChooser.ExtensionFilter extFilter = new FileChooser.ExtensionFilter("TXT files (*.txt)", "*.txt");
fileChooser.getExtensionFilters().add(extFilter);
File file = fileChooser.showSaveDialog(primaryStage);
//为什么我这里保存完没有文件啊?
}
});