File file = new File("huhu");
PrintWriter printWriter = new PrintWriter(file);
printWriter.println("j");
printWriter.close();
long currentTimeMillis = System.currentTimeMillis();
System.out.println(currentTimeMillis);
boolean setLastModified = file.setLastModified(currentTimeMillis - 100000000);
System.out.println(setLastModified);
System.out.println(file.lastModified());
long timestamp = System.currentTimeMillis() + new Random().nextInt(123456789);
System.out.println(timestamp);
f.setLastModified(timestamp);
System.out.println(f.lastModified());
1249583608104
1249583608000