// Fig. L.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
      } // end for
   } // end main
} // end class PrintBits


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