Storing Integer value as A Character Java -

i tried in previous stack overflow questions not find similar.

i want store integer value char variable integer value stored in variable.

    char[] ch1 = (binary1.tostring()).tochararray();     char[] ch2 = binary2.tostring().tochararray();      if (ch1.length >= ch2.length) {          char[] ch = new char[ch1.length];         int j = 0;         int num1;         int num2;         int num3;          (int = 0; < ch1.length; i++) {              if (j == ch2.length - 1)                 j = 0;              num1 = character.getnumericvalue(ch1[i]);             num2 = character.getnumericvalue(ch2[j]);             num3 = num1 ^ num2;              ch[i] = (char) num3;              j++;         }         string str = new string(ch);          return str;      } 

here happening getting null values in many cases. tried in character class not find function.

if there way please tell. in advance.

edit : need store either 0 or 1

edit : ch1[] & ch2[] ar of char type

edit : got temporary solution problem wider concept how should type cast integer char if size same , when getting null values.

you can do

char ch = num3 == 0 ? '0' : '1';