How Can I Construct a Relative Path from Two Absolute Paths in Java?

Relative Path Construction from Absolute Paths in Java

Consider the challenge of constructing a relative path from two absolute paths. For instance, given these absolute paths:

/var/data/stuff/xyz.dat
/var/data

The desired relative path, with the second path as its base, is:

./stuff/xyz.dat

How can this be achieved effectively in Java?

Solution Using URI

To solve this problem, consider utilizing Java's URI class. URI provides a method, relativize, which automates the process of creating a relative path based on the provided absolute paths.

String path = "/var/data/stuff/xyz.dat";
String base = "/var/data";

String relative = new File(base).toURI().relativize(new File(path).toURI()).getPath();

// relative == "stuff/xyz.dat"

Solution Using Java 1.7 Path

If your Java version is 1.7 or later, you can also leverage the relativize method available in java.nio.file.Path.

String path = "/var/data/stuff/xyz.dat";
String base = "/var/data";

Path basePath = Paths.get(base);
Path absPath = Paths.get(path);
Path relativePath = basePath.relativize(absPath);

// relativePath == Paths.get("stuff/xyz.dat")

The above is the detailed content of How Can I Construct a Relative Path from Two Absolute Paths in Java?. For more information, please follow other related articles on the PHP Chinese website!