5月5日，RunPC，每日20行。

import java.awt.*; import java.applet.*; class PC{ static double ad = 8; } public class RunPC extends Applet { public void paint(Graphics g) { PC m = new PC(); PC m1 = new PC(); m.ad = 0.1; g.drawString("m1 = " + m1.ad, 20, 50); g.drawString("PC = " + PC.ad, 20, 70); g.drawString("m = " + m.ad, 20, 90); } }