Write java1,1,2,4,7,13,24,44 algorithm in Java

Write  java1,1,2,4,7,13,24,44 algorithm in Java  ----  Baidu know import java.util.arraylist;import  java.util.list;import java.util.scanner;public class result {//first three numbers private int a  = 1, b = 1, c = 2;private list<integer> list =  null;//construction Method Result ()  {list = new ArrayList<Integer> (); List.add (a); List.add (b); List.add (c);} Returns the result Public int getresult (int index)  {if (index >= 0 &&  index <=3)  {return list.get (index);}  else if (index < 0)  {return -1;} Return calc (Index). get (index);} Calculated and added to the collection Private list<integer> calc (Int index)  {for (int i=3; i<= index; i++)  {//each number equals the sum of the first three int temp = list.get (i-1)  + list.get (i-2)  +  list.get (i-3); List.add (temp);} Return list;} Public static void main (String[] args)  {system.out.println ("Please enter location:"); Int index = new scanner ( system.in). Nextint (); SYSTEM.OUT.PRINTLN (The result of the " + index + " position is: " + new result (). GetResult (Index  - 1));}} This type of article is used only as a record.

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Write java1,1,2,4,7,13,24,44 algorithm in Java