沒有存儲在我的數組列表中的實例

我在類ImageManager中創建了一個方法addImage，它創建Picture類的實例並將其添加到ArrayList。當你通過run類使用imageManager.addImage("title,image,"Arizona","a;ldkjsf;kasjdf"); 添加圖像時，它工作得很好。沒有存儲在我的數組列表中的實例

但是當你從Parser類添加一個圖像中的ImageManager類圖像ArrayList失去調用addImage方法和getImages方法之間從Parser類創建的圖片，但不會失去通過MainViewController類創建的實例。爲什麼它這樣做，我該如何解決它？

public class Run { 
    public static void main(String[] args){ 
     Parser parser = new Parser(); 
     ImageManager imageManager = new ImageManager(); 
     imageManager.addImage("title", "location","description"); 
     parser.parsePictureData(); 
     imageManager.getImages(); 
    } 
} 

public class Parser { 

ImageManager imageManager = new ImageManager(); 
Document document; 

public void parsePictureData() { 
    try{ 
     readXMLFile(); 
     readImageFromDocument(); 
    }catch(IOException e){ 
     e.printStackTrace(); 
    } catch (ParserConfigurationException e) { 
     e.printStackTrace(); 
    } catch (SAXException e) { 
     e.printStackTrace(); 
    } 
} 

private void readXMLFile() throws IOException, SAXException, ParserConfigurationException { 
    File file = new File(System.getProperty("user.dir")+"/src/"+"test.xml"); 
    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); 
    DocumentBuilder builder = factory.newDocumentBuilder(); 
    document = builder.parse(file); 
} 

private void readImageFromDocument() { 
    NodeList pictureNodes = document.getElementsByTagName("picture"); 
    for(int i = 0; i<pictureNodes.getLength();i++){ 
     Node pictureNode = pictureNodes.item(i); 
     if(pictureNode.getNodeType()==Node.ELEMENT_NODE){ 
      Element pictureElement = (Element) pictureNode; 
      String location =pictureElement.getAttribute("location"); 
      String imagePath = pictureElement.getElementsByTagName("path").item(0).getTextContent(); 
      String title = pictureElement.getElementsByTagName("title").item(0).getTextContent(); 
      String description = pictureElement.getElementsByTagName("description").item(0).getTextContent(); 

      imageManager.addImage(title,location,description); 
     } 
    } 
} 

} 

public class ImageManager { 

ArrayList<Pictures> images = new ArrayList<>(); 

public void addImage(String title, String location, String description){ 
    Pictures newImage = new Pictures(title, location, description); 
    images.add(newImage); 
    System.out.println("1"+images); 
} 

public ArrayList<Pictures> getImages(){ 
    System.out.println("2"+images); 
    return images; 
} 

} 

public class Pictures{ 

private String title; 
private String location; 
private String description; 


public Pictures(String title, String location, String description){ 
    this.title = title; 
    this.location = location; 
    this.description = description; 
} 
}

來源

2017-06-20 goobs14

一個MVCE（最小可驗證的完整示例）會更好 – efekctive

@efekctive FYI你可以把[]放在mcve上以獲得[mcve];） – 2017-06-20 19:00:51

將其更改爲更多的MCVE – goobs14

JavaFX Image只能在一個場景圖中使用。嘗試存儲ImageView s，並通過Image image = new Image(imageView);創建Image。可以從相同的ImageView創建多個Images。

來源

2017-06-20 19:08:39 Brydenr

沒有存儲在我的數組列表中的實例

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