升序读取多个文件文件名 [英] Read Multiple Files in ascending order File Name

问题描述

我不知道发生了什么事.我想访问其中包含多个文件的目录:

I dont know what is happening to me. I want to access a directory with multiple files in it suppose:

 folder\\1.txt 2.txt 3.txt....

现在我想根据它们的出现来阅读它们，我的意思是首先降到最低，只是我想按升序阅读它们！ 我的代码是:

now I want to read them according to their occurrence I mean first comes the lowest simply I want to read them in ascending order! My code is:

File f=new File("xxx");
File[] files = f.listFiles(); 
for (File ff : files) {

   if(ff.isFile()) {
   System.out.println(ff.toString());
   }
}

到目前为止，代码可以正常工作，但是将文件作为

so far the code works fine but it takes the files as

1.txt
10.txt
11.txt
9.txt
8.txt
...

出什么问题了，我想按升序顺序阅读它们

so what is going wrong i want to read them orderly in ascending order

推荐答案

只需按 Arrays.sort 进行排序:

        Arrays.sort(files, new Comparator<File>() {

            public int compare(File o1, File o2) {
                int n1 = getNum(o1.getName());
                int n2 = getNum(o2.getName());
                return n1 - n2;
            }
       }

        private int getNum(String name) {
            int i;
            // extract number from the file name here by doing some processes
            return i;
        }

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