StringEqualsEmptyString

Reports equals() being called to compare a String with an empty string. In this case, using .isEmpty() is better as it shows you exactly what you're checking.

Example:

void checkString(String s){
    if ("".equals(s)) throw new IllegalArgumentException();
  }

After the quick-fix is applied:

void checkString(String s){
    if (s != null && s.isEmpty()) throw new IllegalArgumentException();
  }

"".equals(str) returns false when str is null. For safety, this inspection's quick-fix inserts an explicit null-check when the equals() argument is nullable. Use the option to make the inspection ignore such cases.