首先下载Eclipse，我选择的是 Eclipse IDE for Java Developers64位版本，下载下来之后解压缩到喜欢的位置然后双击Eclipse.exe启动
然后开始新建项目，File -> New Java Project，项目名随便写，如下图
右键src文件夹，Add -> New Java Class，这里需要注意Name一栏里填写的内容就是类名，这里我写了TestAlgs4，为了测试「算法 第四版」作者给的那个测试样例
代码如下：
import edu.princeton.cs.algs4.StdDraw; public class TestAlgs4 { public static void main (String[] args) { StdDraw.setScale(-1, 1); StdDraw.clear(StdDraw.BLACK); StdDraw.setPenColor(StdDraw.WHITE); StdDraw.square(0, 0, 1); // write some text StdDraw.setPenColor(StdDraw.WHITE); StdDraw.text(0, +0.95, "Hello, world! This is a test Java program."); StdDraw.text(0, -0.95, "Close this window to finish the installation."); // draw the bullseye StdDraw.setPenColor(StdDraw.BOOK_BLUE); StdDraw.filledCircle(0, 0, 0.9); StdDraw.setPenColor(StdDraw.BLACK); StdDraw.filledCircle(0, 0, 0.8); StdDraw.setPenColor(StdDraw.BOOK_BLUE); StdDraw.filledCircle(0, 0, 0.7); StdDraw.setPenColor(StdDraw.BLACK); StdDraw.filledCircle(0, 0, 0.6); // draw a picture of the textbook StdDraw.picture(0, 0, "cover.jpg",