How to convert Binary String to int array?

Question

Say I have an Integer, I convert it to binary string first.

            int symptomsM = 867;
            String symptomsBit = Integer.toBinaryString(symptomsM);

In this case, I would have symptomsBit as 1101100011 in binary.

But how can I further convert it to Int Array that has the same content, such as
symptomsBitArr[] = {1,1,0,1,1,0,0,0,1,1}?

Okay. Here is what I have tried. I know symptomsBit.split(" ") isn't correct. But do not know how to further improve it.

            symptomsM = 867;
            String symptomsBit = Integer.toBinaryString(symptomsM);
            String[] symptomsBitArr = symptomsBit.split(" ");
            System.out.println("symptomsBit: " + symptomsBit);
            System.out.println("symptomsBitArray: " + symptomsBitArr);
            int[] symptomsArray = new int[symptomsBitArr.length];
            for (int i = 0; i < symptomsBitArr.length; i++) {
                 symptomsArray[i] = Integer.parseInt(symptomsBitArr[i]);
                 System.out.println("symptomsArray: " + symptomsArray);
                }

I tried the way Idos suggested as below:

            symptomsM = 867;
            String symptomsBit = Integer.toBinaryString(symptomsM);
            String[] symptomsBitArr = symptomsBit.split(" ");
            System.out.println("symptomsBit: " + symptomsBit);
            System.out.println("symptomsBitArray: " + symptomsBitArr);
            int[] symptomsArray = new int[symptomsBitArr.length];
            for (int i = 0; i < symptomsBitArr.length; i++) {
                 //symptomsArray[i] = Integer.parseInt(symptomsBitArr[i]);
                 symptomsArray[i] = Integer.parseInt(String.valueOf(symptomsBit.charAt(i)));
                 System.out.println("symptomsArray: " + symptomsArray);
                }

But it still not works. Here is the output:

symptomsBitArray: [Ljava.lang.String; @2a139a55
symptomsArray: [I@15db9742

Answer 1

I think this should do the trick:

String symptomBit = "1010";
for(int i = 0; i < symptomsBitArr.length; i++) {
    symptomsBitArr[i] = Integer.parseInt(String.valueOf(symptomsBit.charAt(i)));
}

// symptomsBitArr = [1,0,1,0]

// print array here
for (int j = 0; j < symptomsBitArr.length; j++) {
    System.out.println("symptomsArray: " + symptomsArray[j]);
}