猫丫：import java.util.ArrayList; import java.util.Arrays; import java.util.Stack; public class subArrayOfgivenValue { public static void main(String[] args) { int[] candidates = { 5, 5, 10, 2, 3 }; int target = 15; ArrayList<ArrayList<Integer>> res = combinationSum(candidates, target); for (ArrayList<Integer> list : res) { System.out.println(list); } } public static ArrayList<ArrayList<Integer>> combinationSum(int[] num, int target) { ArrayList<ArrayList<Integer>> result = new ArrayList<ArrayList<Integer>>(); // Arrays.sort(num); Stack<Integer> stk = new Stack<Integer>(); findCombination(result, 0, target, stk, num); return result; } private static void findCombination(ArrayList<ArrayList<Integer>> result, int index,int target, Stack<Integer> stk, int[] num) { if (target == 0) { result.add(new ArrayList<Integer>(stk)); return; } else { for (int i = index; i < num.length; i++) { if (num[i] > target) continue; stk.push(num[i]); findCombination(result, i + 1, target - num[i], stk, num); stk.pop(); } } } }