import javax.swing.JOptionPane;
public class Bintodec{
	public static void main(String args[]){
	String inputstring;
	int binary;
	int total=0;
	int cache;
	int bin=0;
	int ccache=0;
	int counter;
	double count=0;
	inputstring=JOptionPane.showInputDialog("Enter a binary number:");
	counter=inputstring.length();
	for (int i=0;i<counter;i++){
		bin=0;
		if (inputstring.charAt(i)=='1'){
			count+=Math.pow(2,counter-i-1);
		};
	}
	JOptionPane.showMessageDialog(null,"Decimal:" + count);
	} //End Method main
}//End Class Bintodec