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Rule 02. Expressions (EXP)

Created by Dhruv Mohindra, last modified by David Svoboda on Aug 06, 2025

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Rules

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EXP00-J. Do not ignore values returned by methods
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EXP01-J. Do not use a null in a case where an object is required
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EXP02-J. Do not use the Object.equals() method to compare two arrays
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EXP03-J. Do not use the equality operators when comparing values of boxed primitives
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EXP04-J. Do not pass arguments to certain Java Collections Framework methods that are a different type than the collection parameter type
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EXP05-J. Do not follow a write by a subsequent write or read of the same object within an expression
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EXP06-J. Expressions used in assertions must not produce side effects
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EXP07-J. Prevent loss of useful data due to weak references

Risk Assessment Summary

Rule	Severity	Likelihood	Detectable	Repairable	Priority	Level
EXP00-J	Medium	Probable	Yes	No	P8	L2
EXP01-J	Low	Likely	No	Yes	P6	L2
EXP02-J	Low	Likely	Yes	Yes	P9	L2
EXP03-J	Low	Likely	Yes	Yes	P9	L2
EXP04-J	Low	Probable	Yes	No	P4	L2
EXP05-J	Low	Unlikely	Yes	No	P2	L3
EXP06-J	Low	Unlikely	Yes	Yes	P3	L3

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