Update README.md

johnA1331 · web-flow · commit c644e1cdca1f · 2021-04-29T05:49:08.000+08:00
diff --git a/core-java-modules/core-java-lang-4/README.md b/core-java-modules/core-java-lang-4/README.md
@@ -4,3 +4,4 @@ This module contains articles about core features in the Java language
 
 - [The Java final Keyword – Impact on Performance](https://www.baeldung.com/java-final-performance)
 - [The package-info.java File](https://www.baeldung.com/java-package-info)
+- [What are Compile-time Constants in Java?](https://www.baeldung.com/java-compile-time-constants)

Original file line number	Diff line number	Diff line change
`@@ -4,3 +4,4 @@ This module contains articles about core features in the Java language`
`4`	`4`
`5`	`5`	`- [The Java final Keyword – Impact on Performance](https://www.baeldung.com/java-final-performance)`
`6`	`6`	`- [The package-info.java File](https://www.baeldung.com/java-package-info)`
	`7`	`+- [What are Compile-time Constants in Java?](https://www.baeldung.com/java-compile-time-constants)`