Category: pmd
Rule Key: pmd:OverrideBothEqualsAndHashcode
⚠️ This rule is deprecated in favour of S1206.
Override both public boolean Object.equals(Object other), and public int Object.hashCode(), or override neither. Even if you are inheriting a hashCode() from a parent class, consider implementing hashCode and explicitly delegating to your superclass. Example :
// this is bad public class Bar { public boolean equals(Object o) { // do some comparison } } // and so is this public class Baz { public int hashCode() { // return some hash value } } // this is OK public class Foo { public boolean equals(Object other) { // do some comparison } public int hashCode() { // return some hash value } }