java Netbeans如何在我的计算机中加载任何类型的文件

Question

您好，我想知道是否有一种方法，当我单击netbeans jframe上的按钮时，它会打开我的计算机示例中的任何文件（加载图像/视频/文档）

Answer 1

使用桌面。在按钮点击处理程序中打开（文件）
SE7 Desktop

Answer 2

创建一个File对象（或从JFileChooser中获取一个）对应于要打开的内容，然后使用Desktop.open：

Desktop desktop = Desktop.getDesktop();
if(file.exists()) 
   desktop.open(file);

该方法说明：

Launches the associated application to open the file

还要注意可能出现的例外情况：

NullPointerException - if file is null

IllegalArgumentException - if the specified file doesn't exist

UnsupportedOperationException - if the current platform does not support the Desktop.Action.OPEN action

IOException - if the specified file has no associated application or the associated application fails to be launched

SecurityException - if a security manager exists and its SecurityManager.checkRead(java.lang.String) method denies read access to the file, or it denies the AWTPermission("showWindowWithoutWarningBanner") permission, or the calling thread is not allowed to create a subprocess

Answer 3

有一种方法可以做到这一点：

java.awt.Desktop.getDesktop().open(file);

public void actionPerformed(ActionEvent e) {
if (Desktop.isDesktopSupported()) {
    try {
        File myFile = new File("guide/guide.pdf");
        Desktop.getDesktop().open(myFile);
    } catch (IOException ex) {
        JOptionPane.showMessageDialog(null,
                LocalizationService.localizeString("no_pdf"),
                LocalizationService.localizeString("no_pdf_tit"),
                JOptionPane.INFORMATION_MESSAGE);
    }
}

}

你可以在这里找到例子http://www.journaldev.com/864/how-to-open-a-file-in-java