Binary to Decimal Program in Java

Convert Binary to Decimal Program in Java

There are two way to convert binary to decimal in Java programming first is using predefined method and second is using own logic.

Decimal Number representation of a real number using the base ten and decimal notation.

Binary Number contains only 0 and 1.

import java.util.Scanner;
public class BinaryToDecimal
{ 
 public static void main(String[] args) 
 {
 Scanner in = new Scanner( System.in );
 System.out.println("Enter a Binary Number: ");
 
int  binarynum =in.nextInt();
int binary=binarynum;

int decimal = 0;
int power = 0;
 
while(true)
{
 if(binary == 0)
 {
 break;
 }
 else 
 {
  int tmp = binary%10;
  decimal += tmp*Math.pow(2, power);
  binary = binary/10;
  power++;
 }
}
  System.out.println("Binary="+binary+" Decimal="+decimal); ;
}
}

Enter a Binary Number: 111
Binary is= 111 Decimal=7

Syntax to compile and run java program

for compile -> c:/>javac BinaryToDecimal.java
for run -> c:/>java BinaryToDecimal