io - Can't read the files from a folder in series in java -

i trying read files folder java, found snippet , used it.

file folder = new file("z..");     file[] listoffiles = folder.listfiles();    (int = 0; < listoffiles.length; i++) {       file file = listoffiles[i];       if (file.isfile() && file.getname().endswith(".txt")) {        string content = fileutils.readfiletostring(file);      } 

this works fine except doesn't retrieve files in order. have files numbered file 0,file 1, file2.....file10 , how retrieves file 0 file 1 file 10 , file 2, should retrieve in proper series. should using else? i'm new this.

there great example of using custom comparator sort array of files here: best way list files in java, sorted date last modified

you have modify return of comparator along lines of

return f1.getname().compareto(f2.getname()); 

and should you're looking for.

if files numbered may want compare file names integers:

return integer.valueof(f1.getname()).compareto(integer.valueof(f2.getname()));