Java plotfilter Pro

Twenty Questions.java

public class TwentyQuestions 

{

              public static void main(String[] args) 

 {

        int N = 1 + (int) (Math.random() * 1000000);

        StdOut.print("I'm thinking of a number ");

        StdOut.println("between 1 and 1,000,000");

        int m = 0; 

        while (m != N) 

        {

            StdOut.print("What's your guess? ");

            m = StdIn.readInt();

            if (m == N) StdOut.println("You win!");

            if (m < N)  StdOut.println("Too low ");

            if (m > N)  StdOut.println("Too high");

        }

    }

} 

Average.java

public class Average 

{ 

public static void main(String[] args) 

{ 

        int count = 0;       

        double sum = 0.0;    

                   while (!StdIn.isEmpty()) 

      {

            double value = StdIn.readDouble();

            sum += value;

            count++;

        }

        double average = sum / count;

        StdOut.println("Average is " + average);

    }

}

RangeFilter.java

public class RangeFilter 

{

 public static void main(String[] args) 

{

        int lo = Integer.parseInt(args[0]);

        int hi = Integer.parseInt(args[1]);

        while (!StdIn.isEmpty()) 

        { 

            int t = StdIn.readInt();

            if (t >= lo && t <= hi) 

           {

            StdOut.println(t + " ");

            }

        }

        StdOut.println(); 

    } 

} 

PlotFilter.java

public class PlotFilter 

{ 

 public static void main(String[] args) 

  {

        double x0 = StdIn.readDouble();

        double y0 = StdIn.readDouble();

        double x1 = StdIn.readDouble();

        double y1 = StdIn.readDouble();

        StdDraw.setXscale(x0, x1);

        StdDraw.setYscale(y0, y1);

                    StdDraw.show(0);

        while (!StdIn.isEmpty()) 

        {

            double x = StdIn.readDouble();

            double y = StdIn.readDouble();

            StdDraw.point(x, y);

        }

                         StdDraw.show(0);

    }

}