8282397: createTempFile method of java.io.File is failing when called with suffix of spaces character

Reviewed-by: mbaesken
Backport-of: d48181536fa9b99f01fc80f8adb73777ec6ffa58

1 files changed, 6 insertions, 3 deletions

diff --git a/src/java.base/windows/classes/java/io/WinNTFileSystem.java b/src/java.base/windows/classes/java/io/WinNTFileSystem.java
index f912fa0793..a45fd3e7f8 100644
--- a/src/java.base/windows/classes/java/io/WinNTFileSystem.java
+++ b/src/java.base/windows/classes/java/io/WinNTFileSystem.java
@@ -331,9 +331,12 @@ class WinNTFileSystem extends FileSystem {
         // is a ":" at position 1 and the first character is not a letter
         String pathname = f.getPath();
         int lastColon = pathname.lastIndexOf(":");
-        if (lastColon > 1 ||
-            (lastColon == 1 && !isLetter(pathname.charAt(0))))
-            return true;
+
+        // Valid if there is no ":" present or if the last ":" present is
+        // at index 1 and the first character is a latter
+        if (lastColon < 0 ||
+            (lastColon == 1 && isLetter(pathname.charAt(0))))
+            return false;
 
         // Invalid if path creation fails
         Path path = null;