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

UseEqualsToCompareStrings
Using '==' or '!=' to compare strings only works if intern version is used on both sides
    

		
		
		    
    			
This rule is defined by the following XPath expression:
    			
    			
    

//EqualityExpression/PrimaryExpression
[(PrimaryPrefix/Literal
   [starts-with(@Image, '"')]
   [ends-with(@Image, '"')]
and count(PrimarySuffix) = 0)]

            
  
		    
		    
	    
	    
        
        
        
Example:
            
    
                

class Foo {
  boolean test(String s) {
    if (s == "one") return true; //Bad
    if ("two".equals(s)) return true; //Better
    return false;
  }
}