按照妳的要求編寫的Applet程序如下:
import?java.applet.Applet;import?java.awt.Graphics;
public?class?FF?extends?Applet{
double?a=30.0; double?b=40.0; public?void?init(){ setSize(300,?300); } public?void?paint(Graphics?g){ g.drawLine(100,100,100,(int)(100-b)); g.drawLine(100,100,(int)(100-a),100); g.drawLine(100,(int)(100-b),(int)(100-a),100); g.drawString("直角三角形的直角邊長分別為:"+a+"?"+b,(int)(100-a),120); g.drawString("直角三角形的最長邊長度為:"+Math.sqrt(a*a+b*b),(int)(100-a),140); }}