CODEWITHSUNDEEP
javafile
Java Nerd
Java Nerd

Reputation: 968

Read Multiple Files in ascending order File Name

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....

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());
   }
}

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

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

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

Upvotes: 0

Views: 257

Answers (1)

user3667171
user3667171

Reputation:

just sort by Arrays.sort:

        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;
        }

Upvotes: 1

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