Thread: Getting mp3 files from folder and sorting them using hashmap.

Hi,

I am trying to get solution for getting mp3 files from a specific folder and sort them ascending order. I want to use hash map reason - it can also store the location of the mp3 file. Is this possible??

I tried out the below code but over here we have to enter file names manually.

Can somebody help me out on this?

Awaiting your response!

import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Set;
 
public class Main {
 
	public static void main(String[] args) {
		HashMap<String, String> mp3List= new HashMap<String, String>();
		mp3List.put("rbc.mp3", "rebba camma");
		mp3List.put("abc.mp3", "lamma romma");
		mp3List.put("ter.mp3", "Teriya mama");
		mp3List.put("rat.mp3", "ratatriyla");
 
		Set<String> set=mp3List.keySet();
		String[] keys=new String[set.size()];
		set.toArray(keys);
		List<String> tmpkeyList=Arrays.asList(keys);
 
		Collections.sort(tmpkeyList);
		for(String key:tmpkeyList){
		System.out.println(key+":"+mp3List.get(key));
		}
}
}

Names manually was for the code that tried...

It would be really great - if you can please give me an example on creating the object.. ?

Another approach is along the lines you tried:

* Have the filenames and names in a map (key/value). * Take the key set and from it construct a sorted set * Go through the sorted set with a for loop and pick out the associated name.

Note that there is no array used at any point - that is making things more complicated.

Either way (this or KevinWorkman's) you will have to try things out and post some code so we can see exactly where you are stuck. And probably do a bit of reading. The various collections available are described well in Oracle's Tutorial.