Post bar code. U.S. Postal System

Post.java

public class Post
{
    public static void halfHeight(double i)
    {
	StdDraw.setPenRadius(.01);
	StdDraw.line(i, 0, i, 1);
    }
    public static void fullHeight(double i)
    {
	StdDraw.setPenRadius(0.01);
	StdDraw.line(i, 0, i, 2);
    }
    public static int getDigits(int N)
    {
	int count = 0;
	while(N != 0)
	    {
		N /= 10;
		count++;
	    }
	return count;
    }
    public static void drawGuard(double i)
    {
	fullHeight(i);
    }
    public static void drawBar(int N)
    {
	drawGuard(-0.2);
	double j = 0.0;
	int n = N;
	for(int i = getDigits(N); i > 0; i--)
	    {
		
		int d = (int)(n / Math.pow(10, i-1));
		StdOut.println(d);
		if(d == 0)
		    {
			fullHeight(j);
			fullHeight(j+0.2);
			halfHeight(j+0.4);
			halfHeight(j+0.6);
			halfHeight(j+0.8);
			j += 1.0;
		    }
		else if(d == 1)
		    {
			halfHeight(j);
			halfHeight(j+0.2);
			halfHeight(j+0.4);
			fullHeight(j+0.6);
			fullHeight(j+0.8);
			j += 1.0;
		    }
		else if(d == 2)
		    {
			halfHeight(j);
			halfHeight(j+0.2);
			fullHeight(j+0.4);
			halfHeight(j+0.6);
			fullHeight(j+0.8);
			j += 1.0;
		    }
		else if(d == 3)
		    {
			halfHeight(j);
			halfHeight(j+0.2);
			fullHeight(j+0.4);
			fullHeight(j+0.6);
			halfHeight(j+0.8);
			j += 1.0;
		    }
		else if(d == 4)
		    {
			halfHeight(j);
			fullHeight(j+0.2);
			halfHeight(j+0.4);
			halfHeight(j+0.6);
			fullHeight(j+0.8);
			j += 1.0;
		    }
		else if(d == 5)
		    {
			halfHeight(j);
			fullHeight(j+0.2);
			halfHeight(j+0.4);
			fullHeight(j+0.6);
			halfHeight(j+0.8);
			j += 1.0;
		    }
		else if(d == 6)
		    {
			halfHeight(j);
			fullHeight(j+0.2);
			fullHeight(j+0.4);
			halfHeight(j+0.6);
			halfHeight(j+0.8);
			j += 1.0;
		    }
		else if(d == 7)
		    {
			fullHeight(j);
			halfHeight(j+0.2);
			halfHeight(j+0.4);
			halfHeight(j+0.6);
			fullHeight(j+0.8);
			j += 1.0;
		    }
		else if(d == 8)
		    {
			fullHeight(j);
			halfHeight(j+0.2);
			halfHeight(j+0.4);
			fullHeight(j+0.6);
			halfHeight(j+0.8);
			j += 1.0;
		    }
		else if(d == 9)
		    {
			fullHeight(j);
			halfHeight(j+0.2);
			fullHeight(j+0.4);
			halfHeight(j+0.6);
			halfHeight(j+0.8);
			j += 1.0;
		    }
		
		n = (int)(n % (Math.pow(10, i-1)));
	    }
	fullHeight(j);
    }
    
    public static void setScale(int N)
    {
	int d = getDigits(N);
	StdDraw.setYscale(-2, 2);
	StdDraw.setXscale(-0.3, d);
    }
    public static void main(String[] args)
    {
	int N = Integer.parseInt(args[0]);
	setScale(N);
	drawBar(N);

    }
}