Object Model Violation: Just One of Equals and Hashcode Defined

The software does not maintain equal hashcodes for equal objects.


Description

Java objects are expected to obey a number of invariants related to equality. One of these invariants is that equal objects must have equal hashcodes. In other words, if a.equals(b) == true then a.hashCode() == b.hashCode().

See Also

SEI CERT Oracle Secure Coding Standard for Java - Guidelines 06. Methods (MET)

Weaknesses in this category are related to the rules and recommendations in the Methods (MET) section of the SEI CERT Oracle Secure Coding Standard for Java.

Bad Coding Practices

Weaknesses in this category are related to coding practices that are deemed unsafe and increase the chances that an exploitable vulnerability will be present in the ap...

SFP Secondary Cluster: Design

This category identifies Software Fault Patterns (SFPs) within the Design cluster.

Comprehensive CWE Dictionary

This view (slice) covers all the elements in CWE.

Weaknesses without Software Fault Patterns

CWE identifiers in this view are weaknesses that do not have associated Software Fault Patterns (SFPs), as covered by the CWE-888 view. As such, they represent gaps in...

Weaknesses Introduced During Implementation

This view (slice) lists weaknesses that can be introduced during implementation.


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