Rule Definition
If a Final Instance Variable is not dynamically initialized, its value will be the same for all Instances and need not be an Instance Variable. This final instance variable requires memory for each new instantiation while it could be declared as static and require memory only once for all instances of the class.

Remediation
Review the Field declaration to add the Static modifier.

Violation Code Sample

class Test {      final int x;      public static void main(String[] args)      {          Test t = new Test();          System.out.println(t.x);      }  }   Output:  error: variable x not initialized in the default constructor

Fixed Code Sample

Initialization before constructor completion   class Test {      final int x = 10;      public static void main(String[] args)      {          Test t = new Test();          System.out.println(t.x);      }  }  Output: 10 ---------------------------------------------------------  We can also initialize a final instance variable inside a non-static or instance block also.  class Test {      final int x;      {          x = 10;      }      public static void main(String[] args)      {          Test t = new Test();          System.out.println(t.x);      }  }  Output: 10 ------------------------- Inside default constructor we can also initialize a final instance variable.  class Test {      final int x;      Test()      {          x = 10;      }      public static void main(String[] args)      {          Test t = new Test();          System.out.println(t.x);      }  }  Output: 10 ---------------------------------------------- The above mentioned are the only possible places to perform initialization for final instance variable. If we try to perform initialization anywhere else then we will get compile time error.    // Declare final instance variable within any static blocks  class Test {      final int x;      public static void main(String[] args)      {          x = 10;          Test t = new Test();          System.out.println(t.x);      }  }  Output: error: non-static variable x cannot be referenced from a static context   // Declare or initialize final instance variable within any methods  class Test {      final int x;      public void m()      {          x = 10;      }  }  Output: error: cannot assign a value to final variable x