how to get information from any file extension in java

1import java.util.LinkedList;
2import java.io.File;
3public class getFileExtention{
4	public static String[] getExt(File path, String extentionType) {
5		String [] g = path.list();
6		//We need to convert it into a linkedlist for 
7        //adding whatever we want any size
8		//You could also do it with a number
9		//and iterate over it 
10		LinkedList<String> h = new LinkedList<String>();
11		for(int c = 0;c < g.length;c++) {
12			if(g[c].endsWith(extentionType)) {
13				h.add(g[c]);
14			}
15		}
16		String[] j = new String[h.size()];
17		//Covert it into a array again 
18		//but not if you made it into a linked list type method
19		for (int d = 0; d < h.size(); d++) {
20			j[d] = h.get(d);
21		}
22		return j;
23	}
24}