FULL PRODUCT VERSION :
java version "9.0.1"
Java(TM) SE Runtime Environment (build 9.0.1+11)
Java HotSpot(TM) 64-Bit Server VM (build 9.0.1+11, mixed mode)

java version "1.8.0_152"
Java(TM) SE Runtime Environment (build 1.8.0_152-b16)
Java HotSpot(TM) 64-Bit Server VM (build 25.152-b16, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [Version 10.0.16299.64]

A DESCRIPTION OF THE PROBLEM :
Path.equals() and File.equals() return true for file names that can exist as different files on Windows.
Even though equals() returns true, it can be created as a different file using Files.createFile() or File.createNewFile().

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
java.exe Main.java
javac.exe Main

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
false
false
false
false
ACTUAL -
true
false
true
true

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import java.io.File;
import java.nio.file.Paths;

public class Main {

    public static void main(String[] args) {
        // U+0131 = ı 'LATIN SMALL LETTER DOTLESS I'
        // U+0130 = İ 'LATIN CAPITAL LETTER I WITH DOT ABOVE'
        System.out.println(Paths.get("\u0131").equals(Paths.get("I")));
        System.out.println(Paths.get("\u0130").equals(Paths.get("I")));
        System.out.println(new File("\u0131").equals(new File("I")));
        System.out.println(new File("\u0130").equals(new File("I")));
    }
}
---------- END SOURCE ----------