Where to use resolve() and relativize() method of java.nio.file.Path class?

Question

Path p1 = Paths.get(\"/Users/jack/Documents/text1.txt\");
Path p2 = Paths.get(\"/Users/jack/text2.txt\");
Path result1 = p1.resolve(p2);
Path result2 = p1.relativize(p2)         


        

Answer 1

Path::resolve - Resolve the given path against this path.

If the other parameter is an absolute path then this method trivially returns other.

Path p1 = Paths.get("/usr");
Path p2 = Paths.get("/etc");
Path p3 = p1.resolve(p2); // returns /etc

If other is an empty path then this method trivially returns this path.

Path p1 = Paths.get("/usr");
Path p2 = Paths.get("");
Path p3 = p1.resolve(p2); // returns /usr

Otherwise this method considers this path to be a directory and resolves the given path against this path.

Path p1 = Paths.get("/usr");
Path p2 = Paths.get("local");
Path p3 = p1.resolve(p2); // returns /usr/local

Path::relativize - Constructs a relative path between this path and a given path.

Path p1 = Paths.get("/usr");
Path p2 = Paths.get("/usr/local");
Path p3 = p1.relativize(p2); // returns local

This also means that

Path p1 = Paths.get("/usr");
Path p2 = Paths.get("/usr/../usr/local");
Path p3 = p1.relativize(p2); // returns local

But if the two paths are equal returns an empty path

Path p1 = Paths.get("/usr");
Path p2 = Paths.get("/usr/../usr");
Path p3 = p1.relativize(p2); // returns empty path