How to cast (String <-> number, integer <-> decimal) in Java

String to number 문자 -> 숫자 String strNum = "10"; int i_num = Integer.parseInt(strNum); //return int int i_num2 = Integer.valueOf(strNum);//return integer, call parseInt double d_num = Double.parseDouble(strNum); //return double double d_num2 = Doubl...