Web Reference: What are Null Pointer Exceptions (java.lang.NullPointerException) and what causes them? What methods/tools can be used to determine the cause so that you stop the exception from causing the program to terminate prematurely? Apr 2, 2026 ยท Fix NullPointerException in Java with proven patterns. Covers Java 14+ enhanced messages, Optional class, @NonNull annotations, and Spring Boot scenarios. Aug 5, 2025 ยท Before executing the body of the new method, we should first check its arguments for null values and continue with execution of the method, only when the arguments are properly checked.
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