FULL PRODUCT VERSION : java version "1.8.0_05" Java(TM) SE Runtime Environment (build 1.8.0_05-b13) Java HotSpot(TM) 64-Bit Server VM (build 25.5-b02, mixed mode) ADDITIONAL OS VERSION INFORMATION : Linux xxx 3.2.0-4-amd64 #1 SMP Debian 3.2.60-1+deb7u1 x86_64 GNU/Linux A DESCRIPTION OF THE PROBLEM : java.lang.NullPointerException at sun.nio.fs.UnixPath.normalizeAndCheck(UnixPath.java:77) at sun.nio.fs.UnixPath.(UnixPath.java:71) at sun.nio.fs.UnixFileSystem.getPath(UnixFileSystem.java:281) at java.nio.file.Paths.get(Paths.java:84) when using Path p = Paths.get(null); There is no javadoc indicating the NullPointerException, and according to the javadoc it should throw "InvalidPathException - if the path string cannot be converted to a Path" STEPS TO FOLLOW TO REPRODUCE THE PROBLEM : Just use Paths.get(null); on an unix system (which will use UnixPath) I just tested other things on windows : Paths.get(null) leads to : Exception in thread "main" java.lang.NullPointerException at java.nio.file.Paths.get(Paths.java:132) at atest.test.main(test.java:15) and Paths.get((String)null); leads to : Exception in thread "main" java.lang.NullPointerException at sun.nio.fs.WindowsPathParser.parse(WindowsPathParser.java:98) at sun.nio.fs.WindowsPathParser.parse(WindowsPathParser.java:77) at sun.nio.fs.WindowsPath.parse(WindowsPath.java:94) at sun.nio.fs.WindowsFileSystem.getPath(WindowsFileSystem.java:255) at java.nio.file.Paths.get(Paths.java:84) at atest.test.main(test.java:16) EXPECTED VERSUS ACTUAL BEHAVIOR : EXPECTED - I expect some javadocs comments or correct exceptions to be thrown (IllegalArgumentException ?) ACTUAL - Multiple different errors depending on the platform and the signature of Paths.get used. REPRODUCIBILITY : This bug can be reproduced always. ---------- BEGIN SOURCE ---------- public static void main(String[] args) { try { Paths.get(null); } catch (Exception e) { System.out.println("Path.get(URI) with null arg error"); e.printStackTrace(); } try { Paths.get((String) null); } catch (Exception e) { System.out.println("Path.get(String...varargs) with null arg error"); e.printStackTrace(); } } ---------- END SOURCE ---------- CUSTOMER SUBMITTED WORKAROUND : Null check before using Paths.get() with "if"
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