计算器的java代码

1、import java.awt.BorderLayout;import java.awt.Color;import java.awt.FlowLayout;import java.awt.F ont;import java.awt.GridLayout;import java.awt.eve nt.Act ion Eve nt;import java.awt.eve nt.Act ion Liste ner;import javax.swi ng.JButt on;import javax.swi ng.JFrame;import javax.swi ng.JPa nel;import jav

2、ax.swi ng.JTextField;public class CalculatorB impleme nts Acti on Liste ner private JFrame frame;private JTextField field;private JButton allButtons;private JButton clearButton;/构造初始化成员变量public CalculatorB() frame = new JFrame(Calculator v1.1);field = new JTextField(25);allButto ns = new JButto n16;

3、Stri ng str = 123+456-789*0.=/;for (int i = 0; i 16; i+) allButt on si = new JButt on( str.substri ng(i, i + 1);clearButton = new JButto n( CLEAR);/调用界面的初始化方法ini t();/调用设置文本框的字体和颜色方法setFo ntAn dColor();addEve ntHa ndler();public void addEve ntHa ndler() for (int i = 0; i allButt ons.len gth; i+) all

4、Butt on si.addAct ion Liste ner(this);clearButt on .addAct ion Liste ner(this);private String op = null;private String m = null;private String n = nuII;private boolea n cls = false;private void setResult() if (field.getText().equals() cis = true;m = n ull;n = n ull; else if (m != n ull) n = field.ge

5、tText();if (op.equals(+) field.setText(Double.parseDouble(m) + Double.parseDouble( n)+ ); else if (op.equals(-) field.setText(Double.parseDouble(m) - Double.parseDouble( n)+ ); else if (op.equals(*) field.setText(Double.parseDouble(m) * Double.parseDouble( n)+ ); else if (op.equals(/) field.setText(

6、Double.parseDouble(m) / Double.parseDouble( n)+ );cls = true;m = n ull;n = n ull;public void actio nPerformed(Actio nEvent e) Stri ng str = e.getActio nComma nd();得到被点的按钮名称if (0123456789.indexOf(str) != -1) if (cis) field.setText(”);cis = false;field.setText(field.getText() + str); else if (+-*/.ind

7、exOf(str) != -1) if (field.getText().equals() op = str; else if (m = n ull) m = field.getText(); op = str;field.setText(”); else if (m != n ull) setResult();m = field.getText(); op = str; else if (str.equals(=) setResult(); else if (str.equals(CLEAR) field.setText(”);m = n ull;n = n ull;public void

8、in it() frame.setLayout (new BorderLayout();JPa nel n orthPa nnel = new JPa nel();JPa nel cen terPa nnel = new JPa nel();JPa nel southPa nnel = new JPa nel();no rthPa nn el.setLayout (new FlowLayout();cen terPa nn el.setLayout (new GridLayout(4, 4);southPa nn el.setLayout (new FlowLayout();n orthPa

9、nn el.add(field);southPa nn el.add(clearButt on);for (int i = 0; i allButt ons.len gth; i+) cen terPa nn el.add(allButt on si);frame.add( no rthPa nn el, BorderLayout.NORTH);frame.add(southPa nn el, BorderLayout.SOUTH); frame.add(ce nterPa nn el, BorderLayout.CENTER);public void setFo ntAn dColor()

10、field.setFont(new Font( 宋体,Font.BOLD, 20);field.setForegrou nd(Color.PINK);field.setBackgrou nd( new Color(0x2a, 0x3b, 0x4f);public void showMe() frame.pack(); /系统调整大小-很重要/ frame.setSize(600, 400);/自定义窗体大小frame.setLocatio n(500, 400);/设置窗体的启动位置frame.setVisible(true);frame.setDefaultCloseOperati on(

11、3);public static void main( Stri ng args) new CalculatorB().showMe();When you are old and grey and full of sleep,And no ddi ng by the fire, take down this book,And slowly read, and dream of the soft lookYour eyes had once, and of their shadows deep;How many loved your mome nts of glad grace,And love

12、d your beauty with love false or true,But one man loved the pilgrim soul in you,And loved the sorrows of your cha nging face;And bending dow n beside the glow ing bars,Murmur, a little sadly, how love fledAnd paced upon the mountains overheadAnd hid his face amid a crowd of stars.The furthest dista

13、nee in the worldIs not betwee n life and deathBut whe n I sta nd in front of youYet you dont know thatI love you.The furthest dista nee in the worldIs not whe n I sta nd in front of youYet you cant see my loveBut whe n un doubtedly knowing the love from bothYet cannot be together.The furthest dista

14、nee in the worldIs not being apart while being in loveBut whe n I pla inly cannot resist the year ningYet prete nding you have n ever bee n in my heart.The furthest dista nee in the worldIs not struggli ng aga inst the tidesBut using on es in differe nt heartTo dig an un crossable riverFor the one who loves you.倚窗远眺，目光目光尽处必有一座山，那影影绰绰的黛绿色的影，是春天的 颜色。周遭流岚升腾，没露出那真实的面孔。面对那流转的薄雾，我会幻想，那 里有一个世外桃源。在天阶夜色凉如水的夏夜，我会静静地，静静地，等待一场 流星