BAEL-838 Re-adding last changes with regexp and new line strings. (#1825)

* Code for Dependency Injection Article.

* Added Java based configuration. Downloaded formatter.xml and reformatted
all changed files. Manually changed tab into 4 spaces in XML
configuration files.

* BAEL-434 - Spring Roo project files generated by Spring Roo. No
formatting applied. Added POM, java and resources folders.

* Moved project from roo to spring-roo folder.

* BAEL-838 Initial code showing how to remove last char - helper class and tests.

* BAEL-838 Corrected Helper class and associated empty string test case. Added StringUtils.substing tests.

* BAEL-838 Refromatted code using formatter.xml. Added Assert.assertEquals import. Renamed test to follow convention. Reordered tests.

* BAEL-838 - Added regex method and updated tests.

* BAEL-838 Added new line examples.

core-java/src/main/java/com/baeldung/string/RemoveLastChar.java

@@ -8,4 +8,12 @@ public class RemoveLastChar {
             return (s.substring(0, s.length() - 1));
         }
     }
+
+    public static String chop(String s) {
+        if (s == null) {
+            return s;
+        } else {
+            return s.replaceAll(".$", "");
+        }
+    }
 }