Create a program in Java that reads in a 8-bit String, must be read in as such.

Question

Create a program in Java that reads in a 8-bit String, must be read in as such. Then convert that string of 1's and 0's to decimal as if it were encoded using the following representations:

Unsigned

1's Complement

2's Complement

Q(4.4) (2's complement)

1 bit (sign) - 3 bits (exponent: use bias) - 4 bits (significand), implied binary point w/ 1. Also check for 0....

Do not use helper functions, must be done iterating string and modifying an int/long value.

Example Execution (Highlighting is showing the user input):

EDIT: It is a string of 1s and 0s which represents a binary number that needs to be entered and converted to decimal notation

  Enter a binary number: 10011010  

  Unsigned: 154  1's Comp: -101  2's Comp: -102  Q(4.4): -6.375  S-Exp-Sig: -0.40625  

Explanation / Answer

import java.util.*;
import java.lang.Math;

public class BinaryString{

public static void main(String []args){
Scanner ob = new Scanner(System.in);
String binStr, rev;
int i, s = 0;
System.out.print("Enter a binary number: ");
binStr = ob.next();
  
System.out.print("Unsigned: ");
for(i = 0; i < binStr.length(); i++)
{
if(binStr.charAt(i) == '1')
s += Math.pow(2, (binStr.length() - i - 1));
}
System.out.println(s);
  
s = 0;
System.out.print("1's Comp: ");
for(i = 0; i < binStr.length(); i++)
{
if(binStr.charAt(i) == '0')
s += Math.pow(2, (binStr.length() - i - 1));
}
System.out.println(-s);
  
System.out.print("2's Comp: ");
System.out.println(-(s+1));
}
}

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