Java Arrays.Sort(arr, comparator); does not accept arguments

Question

Can't sort multidinensional array.

static int ccheck[][] = new int[6*6*6][4];

    Comparator<Integer[]> comp = new Comparator<Integer[]>() {
        @Override
        public int compare(Integer[] t, Integer[] t1) {
            Integer in1 = t[3];
            Integer in2 = t1[3];
            return in1.compareTo(in2);                
        }
    };
    Arrays.sort(ccheck, comp);

causes

error: java.lang.RuntimeException: Uncompilable source code - Erroneous sym type: java.util.Arrays.sort

An int[] is not an Integer[].

Sotirios Delimanolis
– Sotirios Delimanolis

2014-01-25 02:54:08 +00:00
Commented Jan 25, 2014 at 2:54 — Sotirios Delimanolis
– Sotirios Delimanolis, Commented Jan 25, 2014 at 2:54

NULL · Accepted Answer · 2014-01-25 15:12:07Z

1

Try changing your code to:

static Integer ccheck[][] = new Integer[6*6*6][4];

    Comparator<Integer[]> comp = new Comparator<Integer[]>() {
    @Override
    public Integer compare(Integer[] t, Integer[] t1) {
        Integer in1 = t[3];
        Integer in2 = t1[3];
        return in1.compareTo(in2);                
        }
    };
    Arrays.sort(ccheck, comp);

edited Jan 25, 2014 at 15:12

answered Jan 25, 2014 at 2:57

NULL

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2 Comments

Mike B Over a year ago

I don't think that will work. You need to make all the ints Integers instead. Otherwise you're invoking compareTo() on an int.

user1428716 Over a year ago

This will not compile

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