Clean code - best way to compact code in Java -


I have a code that looks like this: 

 for  (int i = 0; i & lt; a; i ++) {List & lt; Integer & gt; List = element a. G (i); Some class RG = new classes (list, A, method A (I)); Int results = rg.generate (); Var + = methodA2 (i, result); } (Int i = 0; i & lt; b; i ++) {List & lt; Integer & gt; List = element B.get (i); Some class RG = new classes (list, B, method B (I)); Int results = rg.generate (); Var + = methodB2 (i, result); }   
 How can I avoid this code recurrence? I can create a function that does that, but what is the different ways to do it?   
 
 
 with Java & lt; 8 You can create the interface (note that Java 8 already has a  IntFunction  interface):  
  interface intefunction & lt; A & gt; {One apply}; } M (Element A, A, new interfunction and Lt; A & gt; () {Public A (Int.) {MethodA (i);}});   
 and your method will look like this:  
  Private zero I (collection   
 (I left  methodA2  for conciseness: you will need a second interface in which a  is applied (int, int)   
 With Java 8, this cleaner becomes:  
  m (element A, A, I -> method A (I)) ; // or m (element A, A, this :: method A);

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