Java Utililty Methods Path Relative Get

List of utility methods to do Path Relative Get

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Description

The list of methods to do Path Relative Get are organized into topic(s).

Method

StringgetRelativePath(File fromFile, File toFile)
Calculates a relative path from one file to another. 
String fromPath = fromFile.getCanonicalPath();
String toPath = toFile.getCanonicalPath();
String[] fromPathStack = fromPath.replace(File.separator, "/").split("/");
String[] toPathStack = toPath.replace(File.separator, "/").split("/");
if (0 < toPathStack.length && 0 < fromPathStack.length) {
    if (!fromPathStack[0].equals(toPathStack[0])) {
        return String.join("/", toPathStack);
} else {
    return String.join("/", toPathStack);
int minLength = Math.min(fromPathStack.length, toPathStack.length);
int same = 1; 
while (same < minLength && fromPathStack[same].equals(toPathStack[same]))
    ++same;
List<String> relativePathStack = new ArrayList<>();
for (int i = same; i < fromPathStack.length; i++)
    relativePathStack.add("..");
relativePathStack.addAll(Arrays.asList(toPathStack).subList(same, toPathStack.length));
return String.join("/", relativePathStack);
StringgetRelativePath(File fromFile, File toFile)
get Relative Path 
File fromDir = fromFile.isDirectory() ? fromFile : fromFile.getParentFile();
File toDir = toFile.isDirectory() ? toFile : toFile.getParentFile();
File dir = fromDir;
String relPath = "";
while (dir != null && !dir.equals(toDir)) {
    relPath += "../";
    dir = dir.getParentFile();
if (dir == null) {
    throw new RuntimeException(toFile + " is not in parent of " + fromFile);
return relPath + toFile.toString();
StringgetRelativePath(File fromFolder, File toFile)
Gets the relative path of a file wrt one of its parent directories. 
String basePath = fromFolder.getAbsolutePath();
String filePath = toFile.getAbsolutePath();
if (!filePath.startsWith(basePath))
    throw new IOException("The specified file is not within the folder.");
return filePath.substring(basePath.length() + 1);
StringgetRelativePath(File home, File f)
get relative path of File 'f' with respect to 'home' directory example : home = /a/b/c f = /a/d/e/x.txt s = getRelativePath(home,f) = ../../d/e/x.txt home = "/a/b/c" file = "/a/b/c/d/e.txt" relative path = "d/e.txt" home = "/a/b/c" file = "/a/d/f/g.txt" relative path = "../../d/f/g.txt" 
List<String> homelist;
List<String> filelist;
String s;
homelist = getPathList(home);
filelist = getPathList(f);
s = matchPathLists(homelist, filelist);
return s;
StringgetRelativePath(File home, File f)
get Relative Path 
List<String> homelist;
List<String> filelist;
String s;
homelist = getPathList(home);
filelist = getPathList(f);
s = matchPathLists(homelist, filelist);
return s;
StringgetRelativePath(File home, File f)
get Relative Path 
return matchPathLists(getPathList(home), getPathList(f));
StringgetRelativePath(File original, File directory)
Return a relative path to original as seen from given directory. 
String result = null;
try {
    String o = original.getCanonicalPath();
    String dir = directory.getCanonicalPath() + File.separator;
    int lastCommon = 0;
    int index = dir.indexOf(File.separator);
    while (index >= 0) {
        if (!dir.regionMatches(true, lastCommon, o, lastCommon, index - lastCommon))
...
FilegetRelativePath(File parent, File child)
Returns the relative path to a file with respect to a parent directory. 
parent = parent.getCanonicalFile();
File file = child.getCanonicalFile();
File rval = new File(file.getName());
while ((file = file.getParentFile()) != null) {
    if (parent.equals(file)) {
        return rval;
    rval = new File(file.getName(), rval.getPath());
...
StringgetRelativePath(File parent, File child)
get Relative Path 
if (parent.isFile() || !child.getPath().startsWith(parent.getPath())) {
    return null;
return child.getPath().substring(parent.getPath().length() + 1);
StringgetRelativePath(File parent, File f)
Creates a description of f relative to parent. 
File dir;
if (parent.isDirectory()) {
    dir = parent;
} else {
    dir = parent.getParentFile();
String s = isAncestor(dir, f.getParentFile());
if (s != null) {
...