Java Utililty Methods Rename File

if (!aFile.renameTo(dest)) {
    throw new IOException("Failed to rename " + aFile + " to " + dest);

ensurePathExists(f2.getParent());
if (f2.exists())
    f2.delete();
return f1.renameTo(f2);

File target = new File(file.getParentFile(), newName);
if (target.exists()) {
    if (overwite) {
        if (!target.delete())
            return null;
    } else {
        return null;
return file.renameTo(target) ? target : null;

if (file.isFile()) {
    final String before = file.getName();
    final String shortName = prefix + file.getName();
    optional.put(before, shortName);
    file.renameTo(new File(name));

File to = new File(from.getParentFile(), from.getName() + "." + System.currentTimeMillis());
rename(from, to);
return to;

if (!from.renameTo(to)) {
    if (copy(from, to)) {
        if (!delete(from, true )) {
            return false;
    } else {
        return false;
return true;

if (to.exists() && !to.delete()) {
    throw new IOException("Failed to delete " + to + " while trying to rename " + from);
File parent = to.getParentFile();
if (parent != null && !parent.exists() && !parent.mkdirs()) {
    throw new IOException("Failed to create directory " + parent + " while trying to rename " + from);
if (!from.renameTo(to)) {
...

if (!from.exists()) {
    throw new IOException("Source file to rename (" + from + ") doesn't exist");
if (to.exists()) {
    throw new IOException("Target file to rename (" + to + ") already exists");
long bfor = System.currentTimeMillis();
while (!from.renameTo(to)) {
...

if (!from.exists()) {
    throw new Exception("Rename failed as " + from + " does not exists");
if (to.exists()) {
    throw new Exception("Rename failed as " + to + " already exists");
from.renameTo(to);
for (int i = 0; from.exists() && !to.exists() && i < 20; i++) {
...

if (!from.renameTo(to))
    throw new IOException("Unable to atomically rename \"" + from + "\" to \"" + to + '"');