private static void show(double[] a, int i, int j) {
StdDraw.setYscale(-a.length + i + 1, i);
StdDraw.setPenColor(StdDraw.LIGHT_GRAY);
for (int k = 0; k < j; k++) StdDraw.line(k, 0, k, a[k] * .6);
StdDraw.setPenColor(StdDraw.BOOK_RED);
StdDraw.line(j, 0, j, a[j] * .6);
StdDraw.setPenColor(StdDraw.BLACK);
for (int k = j + 1; k < i; k++) StdDraw.line(k, 0, k, a[k] * .6);
StdDraw.setPenColor(StdDraw.LIGHT_GRAY);
for (int k = i + 1; k < a.length; k++) StdDraw.line(k, 0, k, a[k] * .6);
}
// test client
public static void main(String[] args) {
// parse command-line argument as an array of 1-character strings
String s = "EASYQUESTION";
int N = s.length();
String[] a = new String[N];
for (int i = 0; i < N; i++) a[i] = s.substring(i, i + 1);
// set canvas size
StdDraw.setCanvasSize(30 * (N + 3), 30 * (N + 3));
StdDraw.setXscale(-3, N + 1);
StdDraw.setYscale(N + 1, -3);
StdDraw.setFont(new Font("SansSerif", Font.PLAIN, 13));
// draw the header
header(a);
// sort the array
sort(a);
// draw the footer
footer(a);
}