eclipse实现简单计算器代码

1、package Computer;import javaawt*;import javaawt.event*；import javax swing *;import javax swing borderimport java uti1. LinkedList;import java text NumberFormat;public class Cacultor extends Frame implements ActionListener/* param args*/NumberButton numberButton;OperationButton operationButton;Button

2、小数点按钮，正负号按钮，退格按钮，求倒数按钮，等号按钮，清零按钮;Panel panel;JTextField resuItShow;String 运算符号 = r ”一”、y 7;LinkedList 链表;boolean是否按下等号二false;public Cacultor()super C计算器)；链表二new LinkedList ();numberButton二new Numb erBu11 on10;for(int i=0;i=9;i+)numberButtoni=new NumberButton(i);numberButtoni addActionListener(this);

3、operationButton二new OperationButton4;for(int i=0;i=1) num二num. substring (0, num. length ()-1);链表.set (0, num);resultShow. setText(num);else链表.removeLast ();resultShow. setText (0”)；else if (链表.size()3) String nunF (String)链表 getLast (); if (num. length () =1) num二num. substring (0, num. length() 一

4、1);链表.set (2, num);resultShow. setText(num);else链表.removeLast ();resultShow. setText(0)；else if (e. getSource()=正负号按钮)if (链表.size()=l) String number 1 二(String)链表 getFirst ();trydouble d=Double parseDouble(numberl);d 二-“d;String str=String valueOf(d);链表.set (0, str);resuItShow. setText (str);catch(E

5、xception ee)else if (链表.size()=3) String number2=(String)4 getLast ();trydouble d二Double parseDouble(number2);d=-l*d;String str=String valueOf(d);链表.set(2, str);resuItShow. setText (str);catch(Exception ee)else if (e. getSource()=求倒数按钮)if (链表.size()=l 链表.size()2) String number 1 二(String)链表 getFirst

6、 (); trydouble d二Double parseDouble(number1);d 二 1.0/d;String str=String valueOf(d);链表.set (0, str);resultShow. setText (str);catch(Exception ee)else if (链表.size()=3) String numbe:r2= (String)链表 getLast (); trydouble d二Double parseDouble(number2);d 二 1.0/d;String str=String valueOf(d);链表.set (0, str);resultShow. setText(str);catch(Exception ee) else if (e. getSource()=清零按钮)是否按下等号二false;resultShow. setText (0