44-50, even

44.
public class squareofinteger
{
   public static void main(String[] args)
   {
        for(int number =1; number <= 9; number++)
        {
            int square = number*number;
            System.out.print(square+" ");
        }
}
}
46.
public class fourstars
{
    public static void main(String[] args)
    {
        int star;
        for(star=1; star<=4; star++)
        {
            System.out.print("*");
        }
}
}
48.
//also change the input of double kilo to 50 and 100
public class kilogramstopounds
{
   public static void main(String[] args)
   {
       double kilo=10;
       double pounds;
       conversion(kilo);
    }
   public static void conversion(double kilo)
    {
        double pounds = kilo/.454;
        System.out.print(kilo + " kilograms = " + pounds + "pounds.");
}
}
50.
public class circumference
{
  public static void main(String [] args)
  {
      double radius = 3.2;
      double pi = 3.14159;
      double circumference = radius*2*pi;
      System.out.print("circumference = " + circumference);
}
}