[BAEL-11403] - Moved articles out of core-java (part 4)

core-java/README.md

@@ -23,13 +23,10 @@
 - [Difference between URL and URI](http://www.baeldung.com/java-url-vs-uri)
 - [Creating a Java Compiler Plugin](http://www.baeldung.com/java-build-compiler-plugin)
 - [Quick Guide to Java Stack](http://www.baeldung.com/java-stack)
-- [Guide to java.util.Formatter](http://www.baeldung.com/java-string-formatter)
 - [Guide to the Cipher Class](http://www.baeldung.com/java-cipher-class)
 - [Compiling Java *.class Files with javac](http://www.baeldung.com/javac)
-- [A Guide to Iterator in Java](http://www.baeldung.com/java-iterator)
 - [Introduction to Javadoc](http://www.baeldung.com/javadoc)
 - [Guide to the Externalizable Interface in Java](http://www.baeldung.com/java-externalizable)
-- [A Practical Guide to DecimalFormat](http://www.baeldung.com/java-decimalformat)
 - [How to Detect the OS Using Java](http://www.baeldung.com/java-detect-os)
 - [ASCII Art in Java](http://www.baeldung.com/ascii-art-in-java)
 - [What is the serialVersionUID?](http://www.baeldung.com/java-serial-version-uid)
@@ -48,19 +45,11 @@
 - [Getting a File’s Mime Type in Java](http://www.baeldung.com/java-file-mime-type)
 - [Common Java Exceptions](http://www.baeldung.com/java-common-exceptions)
 - [Throw Exception in Optional in Java 8](https://www.baeldung.com/java-optional-throw-exception)
-- [Add a Character to a String at a Given Position](https://www.baeldung.com/java-add-character-to-string)
-- [Calculating the nth Root in Java](https://www.baeldung.com/java-nth-root)
-- [Convert Double to String, Removing Decimal Places](https://www.baeldung.com/java-double-to-string)
-- [ZoneOffset in Java](https://www.baeldung.com/java-zone-offset)
 - [Hashing a Password in Java](https://www.baeldung.com/java-password-hashing)
 - [Merging java.util.Properties Objects](https://www.baeldung.com/java-merging-properties)
-- [A Guide to SimpleDateFormat](https://www.baeldung.com/java-simple-date-format)
 - [SSL Handshake Failures](https://www.baeldung.com/java-ssl-handshake-failures)
-- [Changing the Order in a Sum Operation Can Produce Different Results?](https://www.baeldung.com/java-floating-point-sum-order)
 - [Java – Try with Resources](https://www.baeldung.com/java-try-with-resources)
 - [Abstract Classes in Java](https://www.baeldung.com/java-abstract-class)
 - [Guide to Character Encoding](https://www.baeldung.com/java-char-encoding)
-- [Calculate the Area of a Circle in Java](https://www.baeldung.com/java-calculate-circle-area)
-- [A Guide to the Java Math Class](https://www.baeldung.com/java-lang-math)
 - [Graphs in Java](https://www.baeldung.com/java-graphs)
 - [Console I/O in Java](http://www.baeldung.com/java-console-input-output)