如果当前文件夹存在，如何在java中创建新文件夹？

File file = new File("C:\Users\user\Desktop\new\"+count);
if (!file.exists()) {
    if (file.mkdir()) {
        System.out.println("Directory is created!");
    } else {
        System.out.println("Failed to create directory!");
    }
File file = new File("C:\Users\user\Desktop\