Duke.java

Below is the syntax highlighted version of Duke.java from §1.5 Input and Output.

/******************************************************************************
 *  Compilation:  javac Duke.java
 *  Execution:    java Duke
 *  Dependencies: StdDraw.java StdIn.java
 *
 *  Draw the sequence of images T1.gif to T17.gif. This creates
 *  the illusion of motion, where the Java mascot Duke cart-wheels
 *  across the screen.
 *
 *  Reference: http://java.sun.com/docs/books/tutorial/uiswing/components/example-1dot4/index.html#TumbleItem
 *
 ******************************************************************************/

public class Duke {

    public static void main(String[] args) {
        int images = 17;                        // number of images
        int WIDTH = 130, HEIGHT = 80;           // images are 130-by-80
        StdDraw.setCanvasSize(WIDTH, HEIGHT);
        StdDraw.setXscale(0, WIDTH);
        StdDraw.setYscale(0, HEIGHT);
        StdDraw.enableDoubleBuffering();

        // main animation loop
        for (int t = 0; true; t++) {
            int i = 1 + (t % images);
            String filename = "T" + i + ".gif";  // name of the ith image
            StdDraw.picture(WIDTH/2.0, HEIGHT/2.0, filename);
            StdDraw.show();
            StdDraw.pause(100);
        }
    }

}