Adder Custom

Misc

public static void main(String[] args) {
		String n1 = "99";
		int n1size = n1.length();
		String n2 = "12";
		int n2size = n2.length();
		if (n2.length() > n1.length()) {
			StringBuilder s = new StringBuilder("");
			for (int i = 0; i < n2size - n1size; i++) {
				s.append("0");
			}
			n1 = s + n1;
			n2size = n1size;
		} else if (n2.length() < n1.length()) {
			StringBuilder s = new StringBuilder("");
			for (int i = 0; i < n1size - n2size; i++) {
				s.append("0");
			}
			n2 = s + n2;
			n1size = n2size;
		}
		int carry = 0;StringBuilder result = new StringBuilder();
		for (int i = n1.length()-1; i >=0 ; i--) {
			int intial = Integer.parseInt(n1.substring(i, i+1));
			int intial1 = Integer.parseInt(n2.substring(i, i+1));
			int val = intial+intial1+carry;
			carry = val/10;
			val = val%10;
			result.insert(0,val);
		}
		System.out.println(carry+result.toString());
	}