java how to read file extension
private static String getFileExtension(File file) { String extension = ""; try { if (file != null && file.exists()) { String name = file.getName(); extension = name.substring(name.lastIndexOf(".")); } } catch (Exception e) { extension = ""; } return extension; }
how to get information from any file extension in java
import java.util.LinkedList; import java.io.File; public class getFileExtention{ public static String[] getExt(File path, String extentionType) { String [] g = path.list(); //We need to convert it into a linkedlist for //adding whatever we want any size //You could also do it with a number //and iterate over it LinkedList<String> h = new LinkedList<String>(); for(int c = 0;c < g.length;c++) { if(g[c].endsWith(extentionType)) { h.add(g[c]); } } String[] j = new String[h.size()]; //Covert it into a array again //but not if you made it into a linked list type method for (int d = 0; d < h.size(); d++) { j[d] = h.get(d); } return j; } }
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