Algorithm for convert binary string to decimal integer.

Decimal.java

class Decimal {
        public static long toLong(String bin) {
  		long decimal = 0;
			for ( int i = 0; i < bin.length(); i++ ) {
				if ( bin.substring(i,i+1).equals("1") ) {
					decimal <<= 1;
					decimal += 1;
				} else if ( bin.substring(i,i+1).equals("0") ) {
					decimal <<= 1;
				} else if ( bin.substring(i,i+1).equals(" ") ) {
					;
				} else {
					break;
				}
			}
			return decimal;
        }
        public static void main(String args[]) {
                String bin = args[0];
				long val = toLong(bin);
                System.out.println(bin + " : " + val);

                System.out.println("Integer : " + Integer.parseInt(bin,2));
        }
}