EqualsAvoidNull: enabled
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2 changed files with 18 additions and 5 deletions
22
README.md
22
README.md
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@ -126,7 +126,7 @@ You need to include `checkstyle` as the version bundled with the `maven-checksty
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* [EmptyPublicCtorInClass](#emptypublicctorinclass) - sevntu - disabled
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* [EmptyStatement](#emptystatement) - checkstyle - enabled
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* [EnumValueName](#enumvaluename) - sevntu - enabled
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* [EqualsAvoidNull](#equalsavoidnull) - checkstyle - disabled
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* [EqualsAvoidNull](#equalsavoidnull) - checkstyle - enabled
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* [EqualsHashCode](#equalshashcode) - checkstyle - enabled
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* [ExecutableStatementCount](#executablestatementcount) - checkstyle - enabled
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* [ExplicitInitialization](#explicitinitialization) - checkstyle - enabled
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@ -918,6 +918,22 @@ Invalid:
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doSomething();;
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````
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#### [EqualsAvoidNull](http://checkstyle.sourceforge.net/config_coding.html#EqualsAvoidNull)
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Checks that string literals are on the left side in an `equals()` comparison.
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Valid:
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````
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String nullString = null;
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"value".equals(nullString);
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````
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Invalid:
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````
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String nullString = null;
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nullString.equals("value");
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````
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#### [EqualsHashCode](http://checkstyle.sourceforge.net/config_coding.html#EqualsHashCode)
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Checks that when a class overrides the `equals()` method, that it also overrides the `hashCode()` method.
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@ -2613,10 +2629,6 @@ These checks are not enabled. Notes are included for each explaining why.
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Couldn't get my IDE's (IntelliJ) code style to match.
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#### [EqualsAvoidNull](http://checkstyle.sourceforge.net/config_coding.html#EqualsAvoidNull)
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> TODO: enable
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#### [FinalLocalVariable](http://checkstyle.sourceforge.net/config_coding.html#FinalLocalVariable)
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> TODO: enable
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@ -74,6 +74,7 @@
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<module name="EmptyForIteratorPad"/> <!-- empty for loop iterator muse have have no spaces -->
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<module name="EmptyLineSeparator"/> <!-- enforce blank lines after header, fields, constructors, methods, etc -->
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<module name="EmptyStatement"/> <!-- prevent standalone ";" semicolons -->
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<module name="EqualsAvoidNull"/> <!-- prevents v = null; v.equals("..") -->
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<module name="EqualsHashCode"/> <!-- if equals() is overridden then so must hashCode() be -->
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<module name="ExecutableStatementCount"/> <!-- limit executable statements to 30 per method -->
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<module name="ExplicitInitialization"/> <!-- avoid initializing a field twice to the same value -->
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