class TestShowSalary 
{
  public static void main(String[] args)
  {
    ShowSalary salary1 = new ShowSalary();
    ShowSalary salary2 = new ShowSalary();
    //
    System.out.println("From salary1, it is " + salary1.previousSalary);
    salary2.previousSalary = 300;
    System.out.println("After salary2 changed it, it is " +
      salary1.previousSalary);
  }
}