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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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SA_FIELD_SELF_ASSIGNMENT

SA: Self assignment of field (SA_FIELD_SELF_ASSIGNMENT)
 This method contains a self assignment of a field; e.g.

  int x;
  public void foo() {
    x = x;
  }

Such assignments are useless, and may indicate a logic error or typo.