卡住尝试对并行数组进行排序

Question

I am trying to sort 2 parallel arrays one with a String and one with int s in it

I want to sort it by the int s and then sort the String to match I am using this code:

        for (int t = 0; t < calctemp.length - 1; t++) {
            for (i = 0; i < calctemp.length - 1; i++) {
                if (calctemp[i].compareTo(calctemp[i + 1]) > 0) {
                    tmpStr = stringtemp[i];
                    tmpInt = calctemp[i];
                    stringtemp[i] = stringtemp[i + 1];
                    calctemp[i] = calctemp[i + 1];
                    stringtemp[i + 1] = tmpStr;
                    calctemp[i + 1] = tmpInt;
                }
            }

This has worked for me before when sorting and string and double array but now I am getting int cannot be dereferenced error on the line if (calctemp[i].compareTo(calctemp[i + 1]) > 0) I am guessing this is due to int being a primitive but I cannot figure out what to replace it with to make it work.

Any help would be appreciated.

Answer 1

I think the error comes at calctemp[i].compareTo(calctemp[i + 1]) while calctemp[i] is just an int and doesn't have the method compareTo .

A quick fix would be to compare as primitives using > as follows:

if (calctemp[i] > calctemp[i + 1])

But in the long run, i would also do it as @MarcoAcierno suggested. Introduce a class which would contain both int and String representations of the respective values. Then implement a comparator, which would compare the int versions as:

public int compare(MyObject o1, MyObject o2) {
  return o1.getIntValue() > o2.getIntValue();
}

Don't forget to implement implement Comparable interface in your class.