'char' expression used in arithmetic context

Reports expressions of the char type used in addition or subtraction expressions.

Such code is not necessarily an issue but may result in bugs (for example, if a string is expected).

Example: int a = 'a' + 42;

After the quick-fix is applied: int a = (int) 'a' + 42;

For the String context:

After the quick-fix is applied:

System.out.println(i2 + "-" + i1 + " = " + (i2 - i1));