Update README.md

engineerscodes · web-flow · commit f2e3233638b4 · 2021-09-06T00:34:24.000+05:30
diff --git a/README.md b/README.md
@@ -13,3 +13,4 @@ My Daily Java Works
 
 # THREAD NOTES
  1) [Potential concurrency issue when Integer object is used as a lock in synchronized block](https://gist.github.com/engineerscodes/312780a6c710a9d7ba0a87b074c2c9f0)
+ 2) [Primitive Wrapper Classes are Immutable in Java](https://www.geeksforgeeks.org/primitive-wrapper-classes-are-immutable-in-java/)

Original file line number	Diff line number	Diff line change
`@@ -13,3 +13,4 @@ My Daily Java Works`
`13`	`13`
`14`	`14`	`# THREAD NOTES`
`15`	`15`	`1) [Potential concurrency issue when Integer object is used as a lock in synchronized block](https://gist.github.com/engineerscodes/312780a6c710a9d7ba0a87b074c2c9f0)`
	`16`	`+ 2) [Primitive Wrapper Classes are Immutable in Java](https://www.geeksforgeeks.org/primitive-wrapper-classes-are-immutable-in-java/)`