Question

我有CrunchifyGetPropertyValue类，可以从config.properties示例中接收参数，如下所示：

...
public int getParamAnswersValue() throws IOException{

        try{
            Properties prop = new Properties();
            String propFileName = "config.properties";

            inputStream = this.getClass().getResourceAsStream("/res/config.properties");

            if(inputStream != null){
                prop.load(inputStream);
            } else {
                throw new FileNotFoundException("property file '" + propFileName + "' not found in the classpath");               
            }
            value = Integer.parseInt(prop.getProperty("paramAnswers"));

            System.out.println(value);
        } catch (Exception e){
            System.out.println("Exception: " + e);
        } finally {
            inputStream.close();
        }
        return value;
    }
...

还有OptionsController.java，其中包含读取/更新config.properties示例的任务，如下所示：

...
CrunchifyGetPropertyValue properties = new CrunchifyGetPropertyValue();

@Override
    public void initialize(URL location, ResourceBundle resources) { 
try{
    slider.setValue(properties.getParamAnswersValue());
    field.setText(Integer.toString(properties.getParamAnswersValue()));
    field.textProperty().bind(slider.valueProperty().asString("%.0f"));
    ...
} catch (IOException ex) {
    Logger.getLogger(OptionsController.class.getName()).log(Level.SEVERE, null, ex);}

问题是，该选项类可以成功将更新保存到config.file，但是在保存之后，当我再次在同一运行中打开此类时，slider.value和field.text确实显示了第一个初始化值在屏幕上，当config.properties在文件中更改自身时，我们可以观察到。示例：

>Run App
>>Open optionPanel //run OptionsController.java
>>>//OptionsController loaded our config.properties data (2:3:4)
>>>We change values from 2:3:4 to 3:3:3
>>>click saveButton
//now we can see by openning config.properties that actually there are 3:3:3 values
>>>optionPanel window is closing
>>Open optionPanel //we open window again in same run
>>>//OptionsController loaded values 2:3:4 instead of 3:3:3
>Close app
>Run app
>>Open optionPanel //run OptionsController.java
>>>//OptionsController loaded our config.properties data (3:3:3)
....

为什么在同一运行中它没有变化？尝试了几件事但无济于事，有什么主意为什么不从同一应用程序运行时从.properties中读取数据？

Config.properties在当前运行中不显示更新，为什么？

0 个答案: