What can scanners scan instead of input. And how do I use it?

Question

Hello. I was trying to make an program that converts binary numbers to
decimal numbers, and then convert back to binary and display on the screen.
But when I tried to scan the Binary number column by column I couldn't do it
because I didn't know how to fill the parameter in the new scanner object.
Please help me.

long binary1;
long binary2;
Scanner scan = new Scanner(System.in);

System.out.println("Input first binary number.");
binary1 = scan.nextLong();
System.out.println("Input second binary number.");
binary2 = scan.nextLong();
long[] powersOf2 = {
2^0,2^1,2^2,2^3,2^4,2^5,2^6,2^7,2^8,2^9,2^10,2^11,2^12,2^13,2^14,2^15

};
Scanner binaryscan = new Scanner(I dont know what to place here);
I want to later make an array with integers from the each column.

Many thanks.

Answer 1

you can make a method in your class like this
static void showNum(long s ,long d ){
// write the the operation that will run on input here
long r ;
r= //the output
System.out.println(r);
}
in the main :
showNum(s,d ); //and replace "s,d" with "binary1,binary2"
..........
this is according what i understanded from your question

Answer 2

scanner is just for your input you can make multiple inputs by pressing enter on the input screen?

after you run your program your input will be compared with your code once.