一个整数数组，有n个整数，如何找其中m个数的和等于另外n-m个数的和

import java.util.ArrayList;
 import java.util.List;//一个整数数组，有n个整数，如何找其中m个数的和等于另外n-m个数的和
 public class Find { public static void main(String args[]) {
  int[] data = new int[] { 1, 2, 8, 5, 6 };
  int sum = 0;
   for (int i = 0; i < data.length; i++) {
    sum = sum + data[i];
   }  List<Integer> list = new ArrayList<Integer>();
  int sum2 = 0;
   while (true) {
    for (int m = 1; m < data.length; m++) {
     sum2 = 0;
     list.clear();
     for (int j = 0; j < m; j++) {
      int temp = (int) (Math.random() * data.length);
      sum2 = sum2 + data[temp];
      list.add(temp);
      if (sum2 == sum / 2) {      for (Integer t : list) {
        System.out.print(t + " ");
       }
       System.out.println();     }
     }   }
   }
  }}
 //再做一下筛选