java中如何判断路径是相对的还是绝对的？

Question

I am developing a tool, which takes a path of an xml file. Now that path can be either relative or absolute. Inside the code, when I have only a string, is there a way to identify that the path is absolute or relative?

Answer 1

How about File.isAbsolute() :

File file = new File(path);
if (file.isAbsolute()) {
    ...
}

Answer 2

There is another very similar way using Paths operations :

Path p = Paths.get(pathName); 
if (p.isAbsolute()) {
    ...
}