CodeQL documentation

Typo in hashCode

ID: java/hashcode-typo
Kind: problem
Security severity: 
Severity: warning
Precision: medium
   - maintainability
   - readability
   - naming
Query suites:
   - java-security-and-quality.qls

Click to see the query in the CodeQL repository

A method named hashcode may be a typographical error. hashCode (different capitalization) may have been intended instead.


Ensure that any such method is intended to have this name. Even if it is, it may be better to rename it to avoid confusion with the inherited method Object.hashCode.


The following example shows a method named hashcode. It may be better to rename it.

public class Person
	private String title;
	private String forename;
	private String surname;

	// ...

	public int hashcode() {  // The method is named 'hashcode'.
		int hash = 23 * title.hashCode();
		hash ^= 13 * forename.hashCode();
		return hash ^ surname.hashCode();


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