Page History

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• Calling the instance method of a null object
• Accessing or modifying the field of a null object
• Taking the length of null as if it were an array
• Accessing or modifying the elements of null as if it were an array
• Throwing null as if it were a Throwable value

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Method isProperName() is noncompliant because it may be called with a null argument, resulting in a null pointer dereference.

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