stringbuilder vs stringbuffer

turopvin · turopvin · commit f6d1bfeadbcd · 2020-05-25T10:58:11.000+03:00
diff --git a/README.md b/README.md
@@ -65,6 +65,7 @@ At the beginning, it was the repository with questions from Java interviews. Cur
 - [orElse() vs orElseGet() in Optional?](core.md#orelse-vs-orelseget-in-optional)
 - [How to filter list of objects using Stream API without .filter()?](core.md#howto-filter-list-of-objects-using-stream-without-filter)
 - [What is String Pool? How do Strings get there?](core.md#what-is-string-pool-how-do-strings-get-there)
+- [What is the difference between StringBuilder and StringBuffer?](core.md#what-is-the-difference-between-stringbuilder-and-stringbuffer)
 
 ## Collections
 - [What is the complexity for get in Hashmap?](collections.md#what-is-the-complexity-for-get-in-hashmap)
diff --git a/core.md b/core.md
@@ -40,6 +40,7 @@
 - [orElse() vs orElseGet() in Optional?](#orelse-vs-orelseget-in-optional)
 - [How to filter list of objects using Stream API without .filter()?](#howto-filter-list-of-objects-using-stream-without-filter)
 - [What is String Pool? How do Strings get there?](#what-is-string-pool-how-do-strings-get-there)
+- [What is the difference between StringBuilder and StringBuffer?](#what-is-the-difference-between-stringbuilder-and-stringbuffer)
 
 ## What's new in Java 8?
 + Lambda expressions, Method Reference , Optional, Streams added.
@@ -296,4 +297,7 @@ String pool is the special memory region where Strings are stored by the JVM.
 ###### Relative links:
 - https://www.baeldung.com/java-string-pool
 
+## What is the difference between StringBuilder and StringBuffer?
+All public methods of StringBuffer are synchronized, it provides Thread safety but on a performance cost.
+
 [Home Page](README.md)
