Thread: Binary Multiplier only working for certain cases

I am trying to create a program that scans two numbers from the user, multiplies them, and then prints the binary result. As of now, my program can multiply binary numbers and output a decimal number. I will get to the rest later. However, the program only works with certain cases. I think it is having trouble recognizing some of the 0's that are inputted. Here it is below:

import java.util.Scanner;
public class BinaryMulitplier {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		System.out.println("Enter a binary number");
		int x = sc.nextInt(); //first input value
		System.out.println("Enter another binary number");
		int y = sc.nextInt(); //second input value
		String Strx = Integer.toString(x); //converts first input value to String
		String Stry = Integer.toString(y); //converts second input value to String
		int lengthx = Strx.length();
		int lengthy = Stry.length();
		double decx = 0;
		double decy = 0;
		double finDecx = 0;
		double finDecy = 0;
		for(int i = lengthx - 1; i >= 0; i--) {
			char charx = Strx.charAt(i); //
			if (charx == '0') {
				decx = 0; //if a digit is 0, it will not go into the conversion
			}
			else if (charx == '1') {
				decx = Math.pow(2, i); //if a digit is 1, it will take 
			}					//2^(numerical placement in the overall number
			finDecx = finDecx + decx; //consecutively adds the numbers from above
		}
		for(int j = lengthy - 1; j >= 0; j--) {
			char chary = Stry.charAt(j); //
			if (chary == '0') {
				decy = 0;
			}
			else if (chary == '1') {
				decy = Math.pow(2, j);
			}
			finDecy = finDecy + decy;
		}
		double prod = finDecx * finDecy; //multiplies the two dec numbers
		System.out.println(prod); //prints the product
	}
}

For example, when I put in 11(3) and 11(3), the output is 9 which is correct. However, if I put in 1010(10) and 111(7), the output is 35 when it should be 70.

--- Update ---

For example, when I put in 11(3) and 11(3), the output is 9 which is correct. However, if I put in 1010(10) and 111(7), the output is 35 when it should be 70.
Also, if I put in 101(5) and 101(5), it outputs 25 which is good. However, when I put in 1010(10) and 1010(10), I also get 25. I don't think it is recognizing the final 0 and I don't know why.