Use final & ternary expression

Author: garydgregory

src/main/java/org/apache/commons/io/output/LockableFileWriter.java

@@ -209,7 +209,7 @@ public LockableFileWriter(final File file, final Charset charset) throws IOExcep
      * @deprecated Use {@link #builder()}
      */
     @Deprecated
-    public LockableFileWriter(final File file, final Charset charset, final boolean append, String lockDir) throws IOException {
+    public LockableFileWriter(final File file, final Charset charset, final boolean append, final String lockDir) throws IOException {
         // init file to create/append
         final File absFile = Objects.requireNonNull(file, "file").getAbsoluteFile();
         if (absFile.getParentFile() != null) {
@@ -220,10 +220,7 @@ public LockableFileWriter(final File file, final Charset charset, final boolean
         }
 
         // init lock file
-        if (lockDir == null) {
-            lockDir = FileUtils.getTempDirectoryPath();
-        }
-        final File lockDirFile = new File(lockDir);
+        final File lockDirFile = new File(lockDir != null ? lockDir : FileUtils.getTempDirectoryPath());
         FileUtils.forceMkdir(lockDirFile);
         testLockDir(lockDirFile);
         lockFile = new File(lockDirFile, absFile.getName() + LCK);