Java determines whether a file exists

public static void main(String[] args) {
        File file = new File("G:\\Jeff.txt");
        File dir = new File("G:\\Jeff");
        // 判断文件是否存在
        if (file.exists()) {
            System.out.println("文件已存在");
        } else {
            System.out.println("文件不存在");
            try {
                file.createNewFile();
                System.out.println("创建文件");
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        
    }