Binary numbers to decimal numbers

Hello, Im writing a program that changes binary numbers to decimal numbers. I seem to be having a probelm calculating the last number in the binary code and adding it to the total. Also, when I use large binary numbers the output isnt anywhere near correct. help? please? thank you

public class binarynumbers
public static void main (String [] args)
int decimal=0;
Scanner scan= new Scanner(System.in);
System.out.print("enter binary number> ");
String bin=scan.next();
int zero=0;
int one=1;
int length=bin.length();
int newlen=length-1;
while (newlen>=0)
     String number = bin.substring( zero , one );
     int number1=Integer.parseInt(number);
     int squareRoot=Math.pow(2,newlen);
     decimal+=(squareRoot*number1);
     newlen--;
     zero++;
     one++;
System.out.println("The decimal number translation is " + decimal);
i did that but the math part isnt working and im getting a message like this
binarynumbers.java:26: possible loss of precision
found : double
required: int
     int squareRoot=Math.pow(2,newlen);
^
1 error

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Adding binary numbers in java please help!!

Hello all, im a total newbie to java and i need your help urgently, i have two variables
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Hello all, im a total newbie to java and i need your
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tmpIntTwo = 1110;These are not binary numbers. These are decimal numbers whose digits consist of ones and zeros. If you want to interpret the characters "010" as a binary number, then do
int tmp1 = Integer.parseInt("1010", 2);
etc.
i want to add these numbers together
int result = tmp1 + tmp;
and return a
binary result Adding two ints will give an int. Int's are always binary. If you want to display it as a binary String, as opposed to the usual decimal String, then, as suggested, use toBinaryString.

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Consider an array of ascii chars....
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Hi all ,
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