AbsoluteTest.java

package fs;

import java.nio.file.FileSystems;
import java.nio.file.Path;

public class AbsoluteTest
{
    public static void main(String[] args)
    {
        isAbsolute("/is/it/abs");
        isAbsolute("\\is\\it\\abs");
        isAbsolute("\\\\ceres\\joakim\\abs");
        isAbsolute("D:\\is\\it\\abs");
    }

    private static void isAbsolute(String fileName)
    {
        // This is wrong, we cannot assume default FileSystem
        Path path = FileSystems.getDefault().getPath(fileName);
        System.out.printf("path [%s].isAbsolute=%b%n", fileName, path.isAbsolute());
    }
}