Question

How to get last updated file in a directory using Java?

Answer 1

'm beginner and i found an old thread about lastmodified files in java. What i want is to get only 10 recent files from a directory and move them to another directory.

This code found in this forum is working well but it gets all files from a directory and sort them with date.

Any help will be aprreciated, thank you

Here is the code:

import java.io.File; import java.util.Arrays; import java.util.Comparator; public class Newest { public static void main(String[] args) { File dir = new File("C:\\your\\dir"); File [] files = dir.listFiles(); Arrays.sort(files, new Comparator(){ public int compare(Object o1, Object o2) { return compare( (File)o1, (File)o2); } private int compare( File f1, File f2){ long result = f2.lastModified() - f1.lastModified(); if( result > 0 ){ return 1; } else if( result < 0 ){ return -1; } else { return 0; } } }); System.out.println( Arrays.asList(files )); } }

i'm beginner here sorry if made some mistakes using the forum.

so for me i don't know how to insert the above in a new code.

And if i keep the first code, i would like to store the 10 recents files into another folder, i trie this but it puts all files in the directory.

any help please

Thank you

import java.io.File; import java.util.Arrays; import java.util.Comparator; import java.io.*; import java.text.*; import java.util.*; public class Newest { public static void main(String[] args) { File dir = new File("c:\\File"); File[] files = dir.listFiles(); Arrays.sort(files, new Comparator<File>() { public int compare(File f1, File f2) { return Long.valueOf(f2.lastModified()).compareTo ( f1.lastModified()); } }); //System.out.println(Arrays.asList(files)); for(int i=0, length=Math.min(files.length, 12); i<length; i++) { System.out.println(files[i]); for (File f : files) { System.out.println(f.getName() + " " + sdf.format(new Date(f.lastModified()))); File dir = new File("c://Target"); boolean success = f.renameTo(new File(dir,f.getName())); if (!success) } } }