用Java替换Host文件

Question

所以这是我的代码到目前为止，是的，我知道这是非常基本的。但我想要完成的是替换位于System32 \ drivers \ etc文件夹中的主机文件，我在执行此操作时遇到的问题是我收到拒绝访问错误。如何让程序访问以在Windows文件夹中进行更改，类SaveURL只是下载文件并使用两个字符串通过函数saveImage传递名称和下载位置。我怎样才能让自己访问？在此先感谢，我真的很感激。

private void jButton7MouseClicked(java.awt.event.MouseEvent evt) {                                      
        String destinationHosts = "hosts";
        String urlHosts = "https://dl.dropbox.com/s/awdvoprxyo7r2q6/hosts?dl=1";
        Object hostOptions[] = {"Replace", "Close"};
        File fileHosts = new File(destinationHosts);
        File dirHost = new File("hosts");
        boolean dirHosts = dirHost.mkdir();
        try {
            Runtime.getRuntime().exec("notepad.exe \\Windows\\system32\\drivers\\etc\\hosts");
            jTextArea2.append("Opening Host File \n");
            int hostFile = JOptionPane.showOptionDialog(rootPane, "Would you like to replace the Hosts File?",
                    "Yes or No", JOptionPane.YES_NO_OPTION, JOptionPane.NO_OPTION, null, hostOptions, hostOptions[0]);
            if (hostFile == JOptionPane.YES_NO_OPTION) {
                jTextArea2.append("Downloading New Host File");
                SaveUrl.saveImage(urlHosts, destinationHosts);
                fileHosts.renameTo(new File(dirHost, fileHosts.getName()));
                Path source = Paths.get("\\hosts\\hosts");
                Path target = Paths.get("\\Windows\\system32\\drivers\\etc\\");
                Files.copy(source, target);
                jTextArea2.append("Host file replaced");
            }
        } catch (IOException ex) {
            Logger.getLogger(ToolKit1.class.getName()).log(Level.SEVERE, null, ex);
        }
    }