Java tutorial
//package com.java2s; import java.util.Collection; public class Main { public static int[] toIntArray(String[] ss) { int[] r = new int[ss.length]; for (int i = 0; i < r.length; i++) { r[i] = Integer.valueOf(ss[i]); } return r; } public static int[] toIntArray(Collection<Integer> list) { return toPrimitive(list.toArray(new Integer[0])); } public static int[] toPrimitive(Integer[] array) { int[] r = new int[array.length]; for (int i = 0; i < array.length; i++) { r[i] = array[i]; } return r; } }