gistfile1.java

// Taken from http://stackoverflow.com/a/4777636/410342, and made immutable
public class Pair<L,R> {
    private L l;
    private R r;
    public Pair(L l, R r){
        this.l = l;
        this.r = r;
    }
    public L getL(){ return l; }
    public R getR(){ return r; }
}

ArrayList<Pair<Integer,Integer>> zeroList=new ArrayList<Pair<Integer,Integer>>();

for(int i=0;i<rows;i++){
  for (int j=0;j<col;j++){
    if(a[i][j]==0){
      zeroList.add(new Pair<Integer, Integer>(i,j));
    }
    
  }
  return zeroList;