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1. How is NullPointerException in Java 14 different from its predecessor?
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2. What are switch expressions and how are they different from switch statements?
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3. Differences of Java 16's Stream.toList() and Stream.collect(Collectors.toList())?
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4. Why don't instance fields need to be final or effectively final to be used in lambda expressions?
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5. How to format LocalDate to ISO 8601 with T and Z?
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