package?com.zzk;

import?java.awt.Graphics;
import?java.awt.Graphics2D;
import?java.awt.geom.Area;
import?java.awt.geom.Ellipse2D;
import?javax.swing.Jframe;
import?javax.swing.JPanel;

public?class?PlusOperationframe?extends?Jframe?{
????PlusOperationPanel?plusOperationPanel?=?new?PlusOperationPanel（）;?//?創(chuàng)建面板類的實(shí)例
????public?static?void?main（String?args[]）?{?//?主方法
????????PlusOperationframe?frame?=?new?PlusOperationframe（）;?//?創(chuàng)建窗體類的實(shí)例
????????frame.setVisible（true）;?//?顯示窗體
????}
????
????public?PlusOperationframe（）?{
????????super（）;?//?調(diào)用超類的構(gòu)造方法
????????settitle（“圖形的加運(yùn)算“）;?//?窗體標(biāo)題
????????setBounds（100?100?395?240）;?//?窗體的顯示位置和大小
????????setDefaultCloseOperation（Jframe.EXIT_ON_CLOSE）;?//?窗體關(guān)閉方式
????????add（plusOperationPanel）;?//?將面板類的實(shí)例添加到窗體容器中
????}
????
????class?PlusOperationPanel?extends?JPanel?{?//?創(chuàng)建內(nèi)部面板類
????????public?void?paint（Graphics?g）?{????//?重寫(xiě)paint（）方法
????????????Graphics2D?g2?=?（Graphics2D）g;?//?獲得Graphics2D對(duì)象
????????????Ellipse2D.

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----
?????文件?????????301??2010-07-31?08:37??.classpath
?????文件?????????379??2010-12-31?13:32??.project
?????文件?????????629??2010-07-31?08:37??.settings\org.eclipse.jdt.core.prefs
?????文件????????1362??2011-01-25?14:29??bin\com\zzk\PlusOperationframe$PlusOperationPanel.class
?????文件????????1001??2011-01-25?14:29??bin\com\zzk\PlusOperationframe.class
?????文件????????1936??2010-07-31?09:39??src\com\zzk\PlusOperationframe.java