Errata : OCA/OCP Java SE 8 Programmer Practice Tests - Chapter 19

[Pallavi Sadit]

Question 28:

Which statement about the following Finalize class is correct?
1: package end;
2: import java.nio.file.*;
3: public class Finalize {
4:    public Path makeAbsolute(Path p) {
5:       if(p!=null && !p.isAbsolute())
6:       return p.toAbsolutePath();
7:       return p;
8:    }
9: }

The answer says " The method compiles and returns a Path value that is always equivalent to the input argument." which is not correct. When the path is absolute, it returns the same path back, but if it is not null and relative, it returns absolute path , which may be from the current working directory and would not be equivalent to input argument.
ex.

Path p1 = Paths.get("D:/test/path1");
Path p2 = Paths.get("test2");
System.out.println(new Finalize().makeAbsolute(p1));
System.out.println(new Finalize().makeAbsolute(p2));

returns
D:\test\path1
D:\Java7Workspace\OCP\test2

The absolute path is equivalent to input path but the relative one is not.

[Jeanne Boyarsky]

You're right! Looking at the answer, we meant line 4 to have p.isAbsolutePath() rather than !p.isAbsolutePath()!