Update README.md

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2023-01-26 16:12:14 +08:00 · 2023-01-26 16:12:14 +08:00 · 47698ae01c
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--- a/core-java-modules/core-java-lang-5/README.md
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@ -13,3 +13,4 @@ This module contains articles about core features in the Java language
 - [Type Parameter vs Wildcard in Java Generics](https://www.baeldung.com/java-generics-type-parameter-vs-wildcard)
 - [Convert Between int and char in Java](https://www.baeldung.com/java-convert-int-char)
 - [Converting a Number from One Base to Another in Java](https://www.baeldung.com/java-converting-a-number-from-one-base-to-another)
+- [Check if Command-Line Arguments Are Null in Java](https://www.baeldung.com/java-check-command-line-args)