// Fig. K.2: PrintBits.java
// Printing an unsigned integer in bits.
import java.util.Scanner;

public class PrintBits {
   public static void main(String[] args) {
      // get input integer
      Scanner scanner = new Scanner(System.in);
      System.out.println("Please enter an integer:");
      int input = scanner.nextInt();

      // display bit representation of an integer
      System.out.println("\nThe integer in bits is:");

      // create int value with 1 in leftmost bit and 0s elsewhere
      int displayMask = 1 << 31;                                 

      // for each bit display 0 or 1 
      for (int bit = 1; bit <= 32; bit++) {
         // use displayMask to isolate bit
         System.out.print((input & displayMask) == 0 ? '0' : '1');

         input <<= 1; // shift value one position to left 

         if (bit % 8 == 0) {
            System.out.print(' '); // display space every 8 bits
         }
      }
   }
} 


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