Java Utililty Methods File Rename

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

if (dest.exists()) {
    System.err.println("FileUtils.renameFile: dest exists -- deleting");
    dest.delete();
boolean success = src.renameTo(dest);
if (!success) {
    success = copyFile(src, dest);
    if (success) {
...

if (dest.exists() && overwrite) {
    dest.delete();
src.renameTo(dest);

if (srcFile.getAbsolutePath().equals(destFile.getAbsolutePath())) {
    return false;
if (srcFile.getParent().equals(destFile.getParent()) && srcFile.getName().toLowerCase(Locale.getDefault())
        .equals(destFile.getName().toLowerCase(Locale.getDefault()))) {
    File tmpFile = new File(destFile.getParent(), UUID.randomUUID().getLeastSignificantBits() + ".tmp");
    if (!tmpFile.exists()) {
        renameFile(srcFile, tmpFile);
...

if (!srcFile.renameTo(dstFile)) {
    InputStream in = null;
    OutputStream out = null;
    try {
        in = new FileInputStream(srcFile);
        out = new FileOutputStream(dstFile);
        transfer(in, out);
    } catch (IOException ioe) {
...

if (!srcFile.exists()) {
    throw new FileNotFoundException("Source file[" + srcFile.getName() + "] not found");
if (renameToFile.exists()) {
    throw new FileNotFoundException("Target file[" + renameToFile.getName() + "] already exists");
if (!renameToFile.getParentFile().isDirectory()) {
    throw new FileNotFoundException("Target directory[" + renameToFile.getParent() + "] does not exists");
...

if (path == null) {
    throw new NullPointerException("path");
if (fname == null) {
    throw new NullPointerException("fname");
final int dotIndex = fname.lastIndexOf('.');
final String prefix = (dotIndex == -1) ? fname : fname.substring(0, dotIndex);
...

final File f_old = new File(oldName);
final File f_new = new File(newName);
final boolean ret = f_old.renameTo(f_new);
return ret;

boolean succeeded = false;
try {
    File currentFile = new File(currentPath);
    if (currentFile.exists()) {
        File newFile = new File(newPath);
        succeeded = currentFile.renameTo(newFile);
} catch (Exception e) {
...

File toBeRenamed = new File(file);
if (!toBeRenamed.exists() || toBeRenamed.isDirectory()) {
    System.out.println("File does not exist: " + file);
    return;
File newFile = new File(toFile);
if (!toBeRenamed.renameTo(newFile)) {
    System.out.println("Error renmaing file");
...