Update README.md

Author: charlesgonzales

java-strings/README.md

@@ -10,7 +10,7 @@
 - [Java – Generate Random String](http://www.baeldung.com/java-random-string)
 - [Convert char to String in Java](http://www.baeldung.com/java-convert-char-to-string)
 - [Convert String to int or Integer in Java](http://www.baeldung.com/java-convert-string-to-int-or-integer)
-- [How to Convert String to different data types in Java](http://www.baeldung.com/java-string-conversions)
+- [Java String Conversions](https://www.baeldung.com/java-string-conversions)
 - [Converting Strings to Enums in Java](http://www.baeldung.com/java-string-to-enum)
 - [Quick Guide to the Java StringTokenizer](http://www.baeldung.com/java-stringtokenizer)
 - [Count Occurrences of a Char in a String](http://www.baeldung.com/java-count-chars)
@@ -27,7 +27,6 @@
 - [Compact Strings in Java 9](http://www.baeldung.com/java-9-compact-string)
 - [Java Check a String for Lowercase/Uppercase Letter, Special Character and Digit](https://www.baeldung.com/java-lowercase-uppercase-special-character-digit-regex)
 - [Convert java.util.Date to String](https://www.baeldung.com/java-util-date-to-string)
-- [String Not Empty Test Assertions in Java](https://www.baeldung.com/java-assert-string-not-empty)
 - [Get Substring from String in Java](https://www.baeldung.com/java-substring)
 - [Converting a Stack Trace to a String in Java](https://www.baeldung.com/java-stacktrace-to-string)
 - [Sorting a String Alphabetically in Java](https://www.baeldung.com/java-sort-string-alphabetically)
@@ -43,4 +42,4 @@
 - [Convert String to Byte Array and Reverse in Java](https://www.baeldung.com/java-string-to-byte-array)
 - [Pad a String with Zeros or Spaces in Java](https://www.baeldung.com/java-pad-string)
 - [Adding a Newline Character to a String in Java](https://www.baeldung.com/java-string-newline)
-- [Remove or Replace part of a String in Java](https://www.baeldung.com/java-remove-replace-string-part)
+- [Remove or Replace part of a String in Java](https://www.baeldung.com/java-remove-replace-string-part)