Sorting files into custom sorting order

Asked May 27 '19 at 13:51

Active May 27 '19 at 13:51

Viewed 41 times

I am looking to implement a sort feature. I want to sort the files in File[] list in a custom format.

File newfile = new File("reports/Weekly/xyz");
File[] list = newfile.listFiles();
Arrays.sort(list, NameFileComparator.NAME_COMPARATOR);

The files appear in the following sequence based on the above code:

1. reports/Weekly/xyz/cmp.xlsx
2. reports/Weekly/xyz/bn-wk.xlsx
3. reports/Weekly/xyz/se-wk.xlsx
4. reports/Weekly/xyz/se-wk-yoy.xlsx

But i want it in a custom order. Meaning,

1. reports/Weekly/xyz/se-wk.xlsx
2. reports/Weekly/xyz/se-wk-yoy.xlsx 
3. reports/Weekly/xyz/bn-wk.xlsx
4. reports/Weekly/xyz/cmp.xlsx

How can I write a custom sort function to do this?

asked May 27 '19 at 13:51

nidhi

are you sure of the order ? `c` comes after `b` in my alphabeth. – Conffusion May 27 '19 at 13:57
@Conffusion yes, it has to be in the same order – nidhi May 27 '19 at 13:59
Then you need to explain the order logic. What if there is a file starting with `d` or `t` ? – Conffusion May 27 '19 at 14:05
Is the condition only applies for b coming before c or you want fir other alphabet too? – ash das May 27 '19 at 14:28
@ashdas the condition applies for other alphabets as well. The names should not be either in the ascending or descending order, rather in a custom format. – nidhi May 28 '19 at 05:04

0 Answers0