Below is the syntax highlighted version of Wave.java
from §3.1 Using Data Types.
/****************************************************************************** * Compilation: javac Wave.java * Execution: java Wave filename * * Produce a wave effect. * * % java Wave baboon.jpg * * ******************************************************************************/ public class Wave { public static void main(String[] args) { Picture pic1 = new Picture(args[0]); pic1.show(); int width = pic1.width(); int height = pic1.height(); Picture pic2 = new Picture(width, height); // wave filter for (int x = 0; x < width; x++) { for (int y = 0; y < height; y++) { int xx = x; int yy = (int) (y + 20 * Math.sin(x * 2 * Math.PI / 64)); if (yy >= 0 && yy < height) { pic2.set(x, y, pic1.get(xx, yy)); } } } pic2.show(); } }