Java Utililty Methods Path Relative Get

String filePath = file.getAbsolutePath();
String folderPath = folder.getAbsolutePath();
if (filePath.startsWith(folderPath)) {
    return filePath.substring(folderPath.length() + 1);
} else {
    return null;

int rootLength = root.getAbsolutePath().length();
String absolutePath = file.getAbsolutePath();
String relativePath = absolutePath.substring(rootLength + 1);
return relativePath;

if (root == null) {
    return file.getAbsolutePath();
if (file == null) {
    return null;
String rootAbsolutePath = root.getAbsolutePath();
String fileAbsolutePath = file.getAbsolutePath();
...

String base = srcDir.getPath();
String filePath = file.getPath();
String relativePath = new File(base).toURI().relativize(new File(filePath).toURI()).getPath();
return relativePath;

return removeLeadingSlashes(file.getAbsolutePath().substring(xmlDirectoryPath.length()));

if (!baseFolder.isDirectory())
    baseFolder = baseFolder.getAbsoluteFile().getParentFile();
return baseFolder.toURI().relativize(fileOrFolder.toURI()).getPath();

String filePath = fileInFolder.getCanonicalPath();
String folderPath = folderContainingFile.getCanonicalPath();
return new File(folderPath).toURI().relativize(new File(filePath).toURI()).getPath();

String fromStr = fromDir.getAbsolutePath();
if (!fromStr.endsWith(File.separator)) {
    fromStr = fromStr + File.separator;
String toStr = toFile.getAbsolutePath();
int pos = fromStr.indexOf(File.separator);
int fromLen = fromStr.length();
int toLen = toStr.length();
...

String fromPath = fromFile.getCanonicalPath();
String toPath = toFile.getCanonicalPath();
String[] fromPathStack = getPathStack(fromPath);
String[] toPathStack = getPathStack(toPath);
if (0 < toPathStack.length && 0 < fromPathStack.length) {
    if (!fromPathStack[0].equals(toPathStack[0])) {
        return getPath(Arrays.asList(toPathStack));
} else {
    return getPath(Arrays.asList(toPathStack));
int minLength = Math.min(fromPathStack.length, toPathStack.length);
int same = 1; 
for (; same < minLength && fromPathStack[same].equals(toPathStack[same]); same++) {
List relativePathStack = new ArrayList();
for (int i = same; i < fromPathStack.length; i++) {
    relativePathStack.add("..");
for (int i = same; i < toPathStack.length; i++) {
    relativePathStack.add(toPathStack[i]);
return getPath(relativePathStack);

if (toFile != null) {
    ArrayList<File> lst = getParents(fromFile, null);
    if (fromFile.isDirectory()) {
        lst.add(fromFile);
    File rootFile = getRoot(toFile, lst);
    if (rootFile != null) {
        String ret = toRoot(rootFile, fromFile)
...