Java Convert 4-Bit Binary Number to Decimal in Java

[mango22223]

hey J.live
I am currently working on this problem as well. I've tried your code but i keep getting an error for the code line:

number=keyboard.nextLine();
number=keyboard.nextLine();

do you know why by any chance?

 

[mango22223]

Here's the code with the extra input line removed, and using the += operator, plus the addition of some white space for better readability.

int value;
String number;
				
		 	     
System.out.print("Enter Number ");
number = keyboard.nextLine();
		 		
value=0;
value += (number.charAt(0) - '0') * 8;
value += (number.charAt(1) - '0') * 4;
value += (number.charAt(2) - '0') * 2;
value += (number.charAt(3) - '0') * 1;

System.out.println(value);

hey Mark44
I am currently working on this problem as well. I've tried your code but i keep getting an error for the code line:

number=keyboard.nextLine();
number=keyboard.nextLine();

do you know why by any chance?

 

[Mark44]

Why do you have two lines there?

Show us your code and I'm sure we can figure it out.

 

[mango22223]

my codes are:


import java.util.Scanner;

public class project11p117 {
Scanner input = new Scanner(System.in);
public static void main(String [] args){

int value;
String number;


System.out.print("Enter Number");
number=keyboard.nextLine();


value=0;
value= value+(number.charAt(0)-'0')*8;
value=value+(number.charAt(1)-'0')*4;
value=value+(number.charAt(2)-'0')*2;
value=value+(number.charAt(3)-'0')*1;

System.out.println(value);

}
}

 

[mango22223]

my codes are:import java.util.Scanner;

public class project11p117 {
Scanner input = new Scanner(System.in);
public static void main(String [] args){

int value;
String number;System.out.print("Enter Number");
number=keyboard.nextLine();value=0;
value= value+(number.charAt(0)-'0')*8;
value=value+(number.charAt(1)-'0')*4;
value=value+(number.charAt(2)-'0')*2;
value=value+(number.charAt(3)-'0')*1;

System.out.println(value);

}
}