Easy to Debug NullPointerException with Java 17

#java #npe #nullpointer #java17

As Java Developer, We have faced NullPointerException throughout
our Java Development career. Sometime ,it is difficult to find such exception at Compile time since its not a checked exception. for example, look at runtime error message in below code.

Exception Message :
Exception in thread "main" java.lang.NullPointerException at MyClass.main(MyClass.java:5)

Error message is not clearly informing which variable has an issue.
We need more information on variable causing this exception and that's where JEP-358 comes for rescue.

If We run same code with Java 17 , It provides more information on which variable is causing NullPointerException.

Exception Message :
Exception in thread "main" java.lang.NullPointerException: Cannot invoke "String.equals(Object)" because "<local2>" is null at MyClass.main(MyClass.java:5)

NOTE:
This change was introduced in Java 14 but JAVA 14 doesn't have LTS ( long term support)

Happy Coding !!!!

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