java - Java 中的 Desktop.getDesktop.open() 失败

Question

我有这段代码:

public void openSelectedFiles(MouseEvent mouseEvent){
    ListView<String> listView = (ListView<String>) ((Node) mouseEvent.getSource())
        .getScene().lookup("#listOfReferenceFiles");

    String selectedFileString =  listView.getSelectionModel().getSelectedItem();
    System.out.println(Desktop.isDesktopSupported());
    File fileToOpen = new File(selectedFileString);
    System.out.println(fileToOpen.exists());

    try {
        Desktop.getDesktop().open(fileToOpen);
    } catch (IOException e) {
        e.printStackTrace();
    }
}

我正在使用 Java 8，它似乎工作正常，直到这一行:

Desktop.getDesktop().open(fileToOpen);

它不会抛出异常，它只是卡住我的应用程序。这是一个错误吗？

Answer 1

您必须先检查桌面是否允许以及文件是否存在以避免此类问题:

//first check if Desktop is supported by Platform or not
if(!Desktop.isDesktopSupported()){
    System.out.println("Desktop is not supported");
    return;
}

Desktop desktop = Desktop.getDesktop();

// after check if file exists and open it
if(file.exists()) desktop.open(file);