The Left Shift

  value << num  

public class Main {
  public static void main(String args[]) {
    byte a = 64, b;
    int i;
    i = a << 2;
    b = (byte) (a << 2);
    System.out.println("Original value of a: " + a);
    System.out.println("i and b: " + i + " " + b);
  }
}

  

public class Main {
  public static void main(String args[]) {
    int num = 0xFFFFFFF;

    for (int i = 0; i < 4; i++) {
      num = num << 1;
      System.out.println(num);

    }
  }
}