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Sanity4J was created to simplify running multiple static code analysis tools on the Java projects. It provides a single entry point to run all the selected tools and produce a consolidated report, which presents all findings in an easily accessible manner.

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SimplifyStartsWith


SimplifyStartsWith

Since it passes in a literal of length 1, this call to String.startsWith can be rewritten using String.charAt(0) to save some time.

This rule is defined by the following XPath expression:


//PrimaryExpression
 [PrimaryPrefix/Name
  [ends-with(@Image, '.startsWith')]]
 [PrimarySuffix/Arguments/ArgumentList
  /Expression/PrimaryExpression/PrimaryPrefix
  /Literal
   [string-length(@Image)=3]
   [starts-with(@Image, '"')]
   [ends-with(@Image, '"')]
 ]
 
            

Example:

                
  
public class Foo {
  boolean checkIt(String x) {
      return x.startsWith("a");
  }
}

      
            




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