Question

3. Write a java method that accepts a binary number and converts it to decimal then display
the result. For Example:
(110)2 = (6)10
(2
2 *1)+ (21 *1) + (20*0) = 6
Additional task: write a method that accepts a decimal and converts it to binary.

i need to solve it as soon as
and i will upvote you directly

Answer 1

Binary to Decimal Method:

    // function to convert binary to decimal
    static int binaryToDecimal(String bin)
    {
        String num = bin;
        int dec = 0, base = 1, len = num.length();
        for (int i = len - 1; i >= 0; i--) {
            if (num.charAt(i) == '1')
                dec += base;
            base = base * 2;
        }
        return dec;
    }

Decimal to binary Method:

    // function to convert decimal to binary
        static int decimalToBinary(int dec)  
        { 
                int bin = 0, cnt = 0;  
                while (dec != 0) 
                {  
                        int rem = dec % 2;  
                        double c = Math.pow(10, cnt);  
                        bin += rem * c;  
                        dec /= 2; 
                        cnt++;  
                }  
                return bin;  
        }

Testing above methods:

Code:

public class Main
{
    // function to convert binary to decimal
    static int binaryToDecimal(String bin)
    {
        String num = bin;
        int dec = 0, base = 1, len = num.length();
        for (int i = len - 1; i >= 0; i--) {
            if (num.charAt(i) == '1')
                dec += base;
            base = base * 2;
        }
        return dec;
    }
    // function to convert decimal to binary
        static int decimalToBinary(int dec)  
        { 
                int bin = 0, cnt = 0;  
                while (dec != 0) 
                {  
                        int rem = dec % 2;  
                        double c = Math.pow(10, cnt);  
                        bin += rem * c;  
                        dec /= 2; 
                        cnt++;  
                }  
                return bin;  
        }
        public static void main(String[] args) {
                System.out.println("Decimal Eqivalent of 110 = " + binaryToDecimal("110"));
                System.out.println("Binary Eqivalent of 6 = " + decimalToBinary(6));
        }
}

Output:

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