Binary 2 Complement Rapidtables Code Example

Example 1: binary to decimal

import java.util.Scanner;  public class BinaryToDecimal {  	public static void main(String[] args) { 		// TODO Auto-generated method stub 		Scanner sc = new Scanner(System.in); 		String binary = sc.next(); 		// This is one line solution for binary to decimal in java 		System.out.println(Integer.parseInt(binary,2)); 		 		//This solution is based on formula for binary to decimal conversion 		int n=0,dec=0; 		for(int i=binary.length()-1;i>=0;i--) 		{ 			dec = dec + Integer.parseInt(String.valueOf(binary.charAt(i)))*(int)Math.pow(2,n); 			n++; 		} 		System.out.println(dec);  	}  }

Example 2: binary to decimal

= (11001010)2 = 1x27+1x26+0x25+0x24+1x23+0x22+1x21+0x20 = 128+64+0+0+8+0+2+0 = (202)10