Getting and Setting the Modification Time of a File or Directory

public static void main(String args[]){
try{
File file = new File("file.txt");

// Get the last modified time
long modifiedTime = file.lastModified();
// 0L is returned if the file does not exist

// Set the last modified time
long newModifiedTime = System.currentTimeMillis();
boolean success = file.setLastModified(newModifiedTime);
if (!success) {
System.out.println("Operation failed");
}
}
catch (Exception ioe){
ioe.printStackTrace();
}
}