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resources.report.rules.pmd.UnnecessaryConstructor.html Maven / Gradle / Ivy

UnnecessaryConstructor

This rule detects when a constructor is not necessary; i.e., when there is only one constructor, its public, has an empty body, and takes no arguments.


                    
//ClassOrInterfaceBody[count(ClassOrInterfaceBodyDeclaration/ConstructorDeclaration)=1]
/ClassOrInterfaceBodyDeclaration/ConstructorDeclaration
[@Public='true']
[not(FormalParameters/*)]
[not(BlockStatement)]
[not(NameList)]
[count(ExplicitConstructorInvocation/Arguments/ArgumentList/Expression)=0]
                    

Example(s):


  
public class Foo {
  public Foo() {}
}