java计算机源代码.doc

package com.tarena.main;import java.awt.Color;import java.awt.FlowLayout;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.AbstractAction;import javax.swing.AbstractButton;import javax.swing.JButton;import javax.swing.JDialog;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JMenu;import javax.swing.JMenuBar;import javax.swing.JMenuItem;import javax.swing.JPanel;import javax.swing.JTextField;import javax.swing.border.BevelBorder;public class Calculator extends JFrame implements ActionListener/-菜单栏定义开始-/public JMenuBar menuBar=new JMenuBar();public JMenu editMenu=new JMenu(编辑(E);public JMenuItem menuItemCopy=new JMenuItem(复制(C);public JMenuItem menuItemPause=new JMenuItem(粘贴(P);public JMenu viewMenu=new JMenu(查看(V);public JMenuItem menuItemStand=new JMenuItem(标准型(T);public JMenuItem menuItemScience=new JMenuItem(科学型(S);public JMenuItem menuItemGroup=new JMenuItem(数学分组(I);public JMenu helpMenu=new JMenu(帮助(H);public JMenuItem menuItemHelp=new JMenuItem(帮组主题(H);public JMenuItem menuItemAbout=new JMenuItem(关于计算器(A);/-菜单栏定义结束-/文本输入框public JTextField msg=new JTextField(0); /标签public JLabel labelInfo=new JLabel();/定义一个panel放MC-M+按钮public JPanel panSave=new JPanel();/定义一个panel放Baskspace CE C 按钮public JPanel panBack=new JPanel();/定义一个panel放0-9 + - */等剩余按钮public JPanel panNum=new JPanel();/创建一个放27个MyButton类型的数组public MyButton buttons=new MyButton27;/fam的作用是缓存public StringBuffer fam=new StringBuffer();public double value=0; public int operator=0;public boolean hasSave=false;public double numSave=0;/-组装菜单栏-public void initMenu()this.setJMenuBar(menuBar);menuBar.add(editMenu);editMenu.add(menuItemCopy);editMenu.add(menuItemPause);menuBar.add(viewMenu);viewMenu.add(menuItemStand);viewMenu.add(menuItemScience);viewMenu.addSeparator();/添加分割线viewMenu.add(menuItemGroup);menuBar.add(helpMenu);helpMenu.add(menuItemHelp);helpMenu.addSeparator();/添加分割线helpMenu.add(menuItemAbout);menuItemAbout.addActionListener(this);/-此将计算器上的所有button创建出来-public void initButton()/将监听绑定到button上Buttonlistener listener=new Buttonlistener();buttons0=new MyButton(listener,7,Color.BLUE);buttons1=new MyButton(listener,8,Color.BLUE);buttons2=new MyButton(listener,9,Color.BLUE);buttons3=new MyButton(listener,/,Color.RED);buttons4=new MyButton(listener,sqrt,Color.BLUE);buttons5=new MyButton(listener,4,Color.BLUE);buttons6=new MyButton(listener,5,Color.BLUE);buttons7=new MyButton(listener,6,Color.BLUE);buttons8=new MyButton(listener,*,Color.RED);buttons9=new MyButton(listener,%,Color.BLUE);buttons10=new MyButton(listener,1,Color.BLUE);buttons11=new MyButton(listener,2,Color.BLUE);buttons12=new MyButton(listener,3,Color.BLUE);buttons13=new MyButton(listener,-,Color.RED);buttons14=new MyButton(listener,1/x,Color.BLUE);buttons15=new MyButton(listener,0,Color.BLUE);buttons16=new MyButton(listener,+/-,Color.BLUE);buttons17=new MyButton(listener,.,Color.BLUE);buttons18=new MyButton(listener,+,Color.RED);buttons19=new MyButton(listener,=,Color.RED);buttons20=new MyButton(listener,MC,Color.RED);buttons21=new MyButton(listener,MR,Color.RED);buttons22=new MyButton(listener,MS,Color.RED);buttons23=new MyButton(listener,M+,Color.RED);buttons24=new MyButton(listener,Bascspace,62,25,Color.RED);buttons25=new MyButton(listener,CE,62,25,Color.RED);buttons26=new MyButton(listener,C,62,25,Color.RED);/-此方法组装剩余控件(文本输入框、Label和button)-public void initAdd()/msg-文本输入框的组装msg.setSize(240,20);msg.setLocation(7, 4);msg.setBackground(Color.WHITE);/背景颜色白色msg.setEditable(false);/文本输入框不能编辑/将文本输入框的内容居右显示msg.setHorizontalAlignment(JTextField.RIGHT);/labelInfo-标签的组装labelInfo.setSize(30,26);labelInfo.setLocation(7,30);/能将标签凹陷labelInfo.setBorder(new BevelBorder(BevelBorder.LOWERED);/panSave-面板的组装panSave.setSize(35,150);panSave.setLocation(7,60);/设置button和button之间的水平间距和垂直间距panSave.setLayout(new FlowLayout(FlowLayout.CENTER,3,3);/将MC MR MS M+放入panSave面板上 for(int i=20;i24;i+) panSave.add(buttonsi); /panClear-面板的组装 panBack.setLocation(45,30); panBack.setSize(200,26); panBack.setLayout(new FlowLayout(FlowLayout.CENTER,3,0); for(int i=24;i27;i+) panBack.add(buttonsi); /panBtn-面板的组装 panNum.setSize(200,150); panNum.setLocation(45,60); panNum.setLayout(new FlowLayout(FlowLayout.CENTER,4,3); for(int i=0;i20;i+)panNum.add(buttonsi); this.setLayout(null);/将JFrame窗体的布局清空this.add(msg);/将文本输入框放入窗体里this.add(labelInfo);/将标签放入窗体里this.add(panSave);this.add(panBack);this.add(panNum);public Calculator()initMenu();initButton();initAdd();this.setResizable(false);this.setLocation(200,200);this.setSize(260,240);this.setVisible(true);this.setTitle(计算器);this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);/-此内部类是专门对计算按钮做监听的-/extends AbstractActionpublic class Buttonlistener extends AbstractActionOverridepublic void actionPerformed(ActionEvent e) / TODO Auto-generated method stubint i;for(i=0;i1)fam.deleteCharAt(fam.length()-1);msg.setText(fam.toString();break;/1/xcase 14:if(value2 !=0)showResult(1/value2)+);fam=new StringBuffer(); break; /sqrtcase 4: showResult(Math.sqrt(value2)+); fam=new StringBuffer(); break;/%case 9:showResult(0.01*value2)+);fam=new StringBuffer();break;/MCcase 20:if(hasSave=true)labelInfo.setText();numSave=0;hasSave=false;break;/MRcase 21:showResult(numSave+);break;/Mscase 22:if(value2!=0)numSave=value2;labelInfo.setText(M);hasSave=true;break;/M+case 23:if(value2!=0)numSave=numSave+value2;labelInfo.setText(M);hasSave=true;break;/.case 17:break;case 16:showResult(-value2)+);fam=new StringBuffer();break;/-内部分类结束-/清空计算机所有变量值，变回原始状态public void clearAll(String result)showResult(result);value=0;operator=0;fam=new StringBuffer();/在JTexefield中显示结果的方法，能将后，后面的。0去掉public void showResult(String result)msg.setText(result.endsWith(.0)?result.substring(0,result.length()-2):result);public static void main(String args) new Calculator();Overridepublic void actionPerformed(ActionEvent e) if(关于计算器(A).equals(e.getActionCommand()AboutDialog about=new AboutDialog(this,true);about.setVisible(true);/此类关于计算器的小窗口public class AboutDialog extends JDialogpublic JLabel label=new JLabel(版权所有(C) 2012 );public JButton button=new JButton(确定);public AboutDialog(JFrame frame,boolean b)super(frame,b);this.setLayout(new FlowLayout();this.add(label);this.add(button);this.pack();/窗体内容自适应this.setTitle(关于计算器);/匿名内部类的形式写button.addActionListener(new ActionListener() Overridepublic void actionPerformed(ActionEvent e) dispose();/销毁该窗体);/将此部分重新建一个class存放以让前面的程序调用package com.tarena.main;import java.awt.Color;import java.awt.Dimension;import java.awt.Font;import java.awt.Insets;import java.awt.event.ActionListener;import javax.swing.JButton;import javax.swing.border.BevelBorder;public class MyButton extends J