Configurable naming conventions for formal parameters of methods and lambdas. This rule reports formal parameters which do not match the regex that applies to their specific kind (e.g. lambda parameter, or final formal parameter). Each regex can be configured through properties. By default this rule uses the standard Java naming convention (Camel case). FormalParameterNamingConventions (Priority: 1, Ruleset: Code Style) https://docs.pmd-code.org/snapshot/pmd_rules_java_codestyle.html#formalparameternamingconventions

Uncommented Empty Constructor finds instances where a constructor does not contain statements, but there is no comment. By explicitly commenting empty constructors it is easier to distinguish between intentional (commented) and unintentional empty constructors. UncommentedEmptyConstructor (Priority: 1, Ruleset: Documentation) https://docs.pmd-code.org/snapshot/pmd_rules_java_documentation.html#uncommentedemptyconstructor

Uncommented Empty Constructor finds instances where a constructor does not contain statements, but there is no comment. By explicitly commenting empty constructors it is easier to distinguish between intentional (commented) and unintentional empty constructors. UncommentedEmptyConstructor (Priority: 1, Ruleset: Documentation) https://docs.pmd-code.org/snapshot/pmd_rules_java_documentation.html#uncommentedemptyconstructor

Unused Private Method detects when a private method is declared but is unused. UnusedPrivateMethod (Priority: 1, Ruleset: Best Practices) https://docs.pmd-code.org/snapshot/pmd_rules_java_bestpractices.html#unusedprivatemethod

Unused Private Method detects when a private method is declared but is unused. UnusedPrivateMethod (Priority: 1, Ruleset: Best Practices) https://docs.pmd-code.org/snapshot/pmd_rules_java_bestpractices.html#unusedprivatemethod

For classes that only have static methods, consider making them utility classes. Note that this doesn't apply to abstract classes, since their subclasses may well include non-static methods. Also, if you want this class to be a utility class, remember to add a private constructor to prevent instantiation. (Note, that this use was known before PMD 5.1.0 as UseSingleton). UseUtilityClass (Priority: 1, Ruleset: Design) https://docs.pmd-code.org/snapshot/pmd_rules_java_design.html#useutilityclass

Unused Private Method detects when a private method is declared but is unused. UnusedPrivateMethod (Priority: 1, Ruleset: Best Practices) https://docs.pmd-code.org/snapshot/pmd_rules_java_bestpractices.html#unusedprivatemethod

For classes that only have static methods, consider making them utility classes. Note that this doesn't apply to abstract classes, since their subclasses may well include non-static methods. Also, if you want this class to be a utility class, remember to add a private constructor to prevent instantiation. (Note, that this use was known before PMD 5.1.0 as UseSingleton). UseUtilityClass (Priority: 1, Ruleset: Design) https://docs.pmd-code.org/snapshot/pmd_rules_java_design.html#useutilityclass

Uncommented Empty Constructor finds instances where a constructor does not contain statements, but there is no comment. By explicitly commenting empty constructors it is easier to distinguish between intentional (commented) and unintentional empty constructors. UncommentedEmptyConstructor (Priority: 1, Ruleset: Documentation) https://docs.pmd-code.org/snapshot/pmd_rules_java_documentation.html#uncommentedemptyconstructor

Uncommented Empty Constructor finds instances where a constructor does not contain statements, but there is no comment. By explicitly commenting empty constructors it is easier to distinguish between intentional (commented) and unintentional empty constructors. UncommentedEmptyConstructor (Priority: 1, Ruleset: Documentation) https://docs.pmd-code.org/snapshot/pmd_rules_java_documentation.html#uncommentedemptyconstructor

Identical `catch` branches use up vertical space and increase the complexity of code without adding functionality. It's better style to collapse identical branches into a single multi-catch branch. IdenticalCatchBranches (Priority: 3, Ruleset: Code Style) https://docs.pmd-code.org/snapshot/pmd_rules_java_codestyle.html#identicalcatchbranches