import java.awt.Frame;
import java.awt.Panel;
import java.awt.Color;
import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.FlowLayout;
import java.awt.TextField;
import java.awt.Button;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class Calculator extends Frame{
#Panel panel1=null;
#Panel panel2=null;
#Panel panel3=null;
#TextField txt;
#Button[] button=new Button[18];
#String[]
string={"1","2","3","+","4","5","6","-","7","8","9","*","0",".","=","/","清空","关
闭"};
#static double a;
#static String s,str;//定义变量,创建对象
#
#public Calculator(String c){//构造方法
##super(c);
##initialize();
#}
#
#public void initialize(){//初始化窗体
##this.setSize(180,240);
##this.setLocation(350,200);
##this.setBackground(Color.green);
##this.setResizable(false);
##this.addPanel();
#}
#
#public void addPanel(){//往窗体中添加面板
##this.add(getPanel1(),BorderLayout.NORTH);
##this.add(getPanel2(),BorderLayout.CENTER);
##this.add(getPanel3(),BorderLayout.SOUTH);#
#}
#