JAVA-27804: Remove explicit logging dependency (#15448)

core-java-modules/core-java-string-operations/src/main/java/com/baeldung/isnumeric/IsNumericDriver.java

@@ -1,9 +1,10 @@
 package com.baeldung.isnumeric;
 
-import org.apache.log4j.Logger;
+
+import java.util.logging.Logger;
 
 public class IsNumericDriver {
-    private static Logger LOG = Logger.getLogger(IsNumericDriver.class);
+    private static Logger LOG = Logger.getLogger(IsNumericDriver.class.getName());
 
     private static IsNumeric isNumeric = new IsNumeric();