add back TempFileUtils.java due to broken build

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1880171 13f79535-47bb-0310-9956-ffa450edef68

src/examples/src/org/apache/poi/examples/util/TempFileUtils.java

@@ -0,0 +1,47 @@
+/*
+ *  ====================================================================
+ *    Licensed to the Apache Software Foundation (ASF) under one or more
+ *    contributor license agreements.  See the NOTICE file distributed with
+ *    this work for additional information regarding copyright ownership.
+ *    The ASF licenses this file to You under the Apache License, Version 2.0
+ *    (the "License"); you may not use this file except in compliance with
+ *    the License.  You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *    Unless required by applicable law or agreed to in writing, software
+ *    distributed under the License is distributed on an "AS IS" BASIS,
+ *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *    See the License for the specific language governing permissions and
+ *    limitations under the License.
+ * ====================================================================
+ */
+
+package org.apache.poi.examples.util;
+
+import java.io.File;
+
+import org.apache.poi.util.TempFile;
+
+public final class TempFileUtils {
+    private TempFileUtils() {
+    }
+
+    @SuppressWarnings("java:S106")
+    public static void checkTempFiles() {
+        String tmpDir = System.getProperty(TempFile.JAVA_IO_TMPDIR) + "/poifiles";
+        File tempDir = new File(tmpDir);
+        if(tempDir.exists()) {
+            String[] tempFiles = tempDir.list();
+            if(tempFiles != null && tempFiles.length > 0) {
+                System.out.println("found files in poi temp dir " + tempDir.getAbsolutePath());
+                for(String filename : tempFiles) {
+                    System.out.println("file: " + filename);
+                }
+            }
+        } else {
+            System.out.println("unable to find poi temp dir");
+        }
+    }
+}
+