How to shorten classpath?

Shorten ArrayLists in Java?

• Write a static method called shorten that takes an ArrayList of Integers as a parameter. It should replace each sequence of two or more equal Integers in the ArrayList with a single Integer equal to the sum of the Integers that were equal. For example, suppose that the parameter is an ArrayList named a containing: [3, 7, 7, 7, 3, 6, 6, 14] Then after calling shorten the ArrayList a should contain: [3, 21, 3, 12, 14] So the 3 occurrences of 7 were replaced with 21, and the 2 occurrences of 6 were replaced with 12. The two occurrences of 3 aren’t changed, since they aren’t next to each other. What I have so far: import java.util.*; public class FinalPractice7{ public static void main(String args[]){ ArrayList<Integer>list = new ArrayList<Integer>(); list.add(3); list.add(7); list.add(7); list.add(7); list.add(3); list.add(6); list.add(6); list.add(14); shorten(list); } public static void shorten(ArrayList<Integer> list) { for(int i = 0; i < list.size()-1; i++){ int first = list.get(i); int second = list.get(i+1); while(first == second){ first +=second; list.remove(i); list.remove(i+1); list.add(i,first); // System.out.println(first); } } System.out.println(list); } } Any guidance/tips would be appreciated. Thank you!

• Answer:

  public static void shorten(ArrayList<Integer> list) { for(int i = 0; i < list.size()-1; i++){ int sum = list.get(i); for(int j=i; list.get(j)==list.get(j+1)&&j< list.size()-1;j++){ sum+=list.get(j); } for(int j=0;j<((sum/list.get(i))-1); j++) list.remove(i+1); list.set(i, sum); } System.out.println(list); }