Update README.md

johnA1331 · web-flow · commit 2040890c2f28 · 2021-11-10T19:20:50.000+08:00
diff --git a/core-java-modules/core-java-17/README.md b/core-java-modules/core-java-17/README.md
@@ -1,3 +1,4 @@
 ### Relevant articles:
 
 - [Pattern Matching for Switch](https://www.baeldung.com/java-switch-pattern-matching)
+- [Introduction to HexFormat in Java 17](https://www.baeldung.com/java-hexformat)

Original file line number	Diff line number	Diff line change
`@@ -1,3 +1,4 @@`
`1`	`1`	`### Relevant articles:`
`2`	`2`
`3`	`3`	`- [Pattern Matching for Switch](https://www.baeldung.com/java-switch-pattern-matching)`
	`4`	`+- [Introduction to HexFormat in Java 17](https://www.baeldung.com/java-hexformat)`