java计算器程序代码.docVIP

标记：已将此邮件标记为星标邮件。取消星标正在查询发送状态.查询发信状态失败，重新查询java课程设计专业：计算机应用技术 班级： 0901 学号：2009200637 设计人： 谢荣芳 指导教师：兰方鹏 一、JAVA源代码import java.awt.*;import java.awt.event.*;import java.io.*;import javax.swing.*;import javax.swing.JTextArea;import java.applet.*;import java.awt.datatransfer.*; public class myzy public static void main(String args) MyFrame win=new MyFrame(java设计的windows窗口);/复数运算窗口class Complex extends Frame implements ActionListener TextField txt1,txt2,txt3,txt4,txt5,txt6;/声明对象 Button button6,button7,button8,button9; Label label2; Box box1,box2,box3,box4,box5,box6,box7,box8,box9;/声明两个行型盒式容器box1,box2 / 一个列型盒式容器 box3 Complex()setLayout(new FlowLayout(); txt1=new TextField(3);/对象实例化 txt2=new TextField(3); txt3=new TextField(3); txt4=new TextField(3); txt5=new TextField(3); txt6=new TextField(3); label2=new Label( ); button6=new Button(加); button7=new Button(减); button8=new Button(乘); button9=new Button(除); box1=Box.createHorizontalBox(); box1.add(txt1); box1.add(new Label(+); box1.add(txt3); box1.add(new Label(i); box4=Box.createHorizontalBox(); box4.add(label2); box5=Box.createHorizontalBox(); box5.add(txt2); box5.add(new Label(+); box5.add(txt4); box5.add(new Label(i); box6=Box.createHorizontalBox(); box6.add(new Label(=); box7=Box.createHorizontalBox(); box7.add(txt5); box7.add(new Label(+); box7.add(txt6); box7.add(new Label(i); box8=Box.createVerticalBox(); box8.add(box1); box8.add(Box.createVerticalStrut(3); box8.add(box4); box8.add(Box.createVerticalStrut(3); box8.add(box5); box8.add(Box.createVerticalStrut(3); box8.add(box6); box8.add(Box.createVerticalStrut(3); box8.add(box7); box2=Box.createVerticalBox(); box2.add(button6); box2.add(Box.createVerticalStrut(3); box2.add(button7); box2.add(Box.createVerticalStrut(3); box2.add(button8); box2.add(Box.createVerticalStrut(3); box2.add(button9); box9=Box.createHorizontalBox(); box9.add(box2); box9.add(Box.createVerticalStrut(35); box9.add(box8); add(box9); button6.addActionListener(this);/对象添加监视器 button7.addActionListener(this);button8.addActionListener(this); button9.addActionListener(this); setSize(200,200); setVisible(true); setResizable(false); addWindowListener(new WindowAdapter()/为窗口添加监视器，保证窗口正常关闭 public void windowClosing(WindowEvent e) System.exit(0); );validate();public void actionPerformed(ActionEvent e)/实现接口方法 double m1,m2; if(e.getSource()=button6) / 实现复数相加 double a,b,c,d; try a=Double.parseDouble(txt1.getText(); c=Double.parseDouble(txt2.getText(); b=Double.parseDouble(txt3.getText(); d=Double.parseDouble(txt4.getText(); m1=a+c; m2=b+d; txt5.setText(String.valueOf(m1); txt6.setText(String.valueOf(m2); label2.setText(+); catch(NumberFormatException ee) txt6.setText(请输入数字字符); else if(e.getSource()=button7) /实现复数相减 double a,b,c,d; try a=Double.parseDouble(txt1.getText(); c=Double.parseDouble(txt2.getText(); b=Double.parseDouble(txt3.getText(); d=Double.parseDouble(txt4.getText(); m1=a-c; m2=b-d; txt5.setText(String.valueOf(m1); txt6.setText(String.valueOf(m2); label2.setText(-); catch(NumberFormatException ee) txt6.setText(请输入数字字符); else if(e.getSource()=button8) /实现复数相乘 double a,b,c,d; try a=Double.parseDouble(txt1.getText(); c=Double.parseDouble(txt2.getText(); b=Double.parseDouble(txt3.getText(); d=Double.parseDouble(txt4.getText(); m1=a*c-b*d; m2=a*d+b*c; txt5.setText(String.valueOf(m1); txt6.setText(String.valueOf(m2); label2.setText(*); catch(NumberFormatException ee) txt6.setText(请输入数字字符); if(e.getSource()=button9) /实现复数相除 double a,b,c,d; try a=Double.parseDouble(txt1.getText(); c=Double.parseDouble(txt2.getText(); b=Double.parseDouble(txt3.getText(); d=Double.parseDouble(txt4.getText(); m1=(a*c+b*d)/(c*c+d*d); m2=(b*c-a*d)/(c*c+d*d); txt5.setText(String.valueOf(m1); txt6.setText(String.valueOf(m2); label2.setText(/); catch(NumberFormatException ee) txt6.setText(请输入数字字符); validate();/计算器窗口class CalculatorFrame extends Frame implements ActionListener TextField text2,text3,text4;/声明对象Button button1,button2,button3,button4,button5;Label label,label1;Box baseBox1,baseBox2,baseBox;/声明两个行型盒式容器baseBox1,baseBox2,一个列型盒式容器,baseBox CalculatorFrame() setLayout(new FlowLayout();text2=new TextField(10);/为对象分配内存text3=new TextField(10);text4=new TextField(10);label=new Label( );label1=new Label(=);label.setBackground(Color.yellow);label1.setBackground(Color.green);button1=new Button(+);button2=new Button(-);button3=new Button(*);button4=new Button(/);button5=new Button(复数运算); baseBox1=Box.createHorizontalBox();/添加的组件之间插入水平支撑控制组件之间距离 baseBox1.add(Box.createHorizontalStrut(10); baseBox1.add(text2); baseBox1.add(Box.createHorizontalStrut(10); baseBox1.add(label); baseBox1.add(Box.createHorizontalStrut(10); baseBox1.add(text3); baseBox1.add(Box.createHorizontalStrut(10); baseBox1.add(label1); baseBox1.add(Box.createHorizontalStrut(10); baseBox1.add(text4); baseBox1.add(Box.createHorizontalStrut(10); baseBox2=Box.createHorizontalBox();/添加的组件之间插入垂直支撑控制组件之间距离 baseBox2.add(Box.createHorizontalStrut(10); baseBox2.add(button1); baseBox2.add(Box.createHorizontalStrut(10); baseBox2.add(button2); baseBox2.add(Box.createHorizontalStrut(10); baseBox2.add(button3); baseBox2.add(Box.createHorizontalStrut(10); baseBox2.add(button4); baseBox2.add(Box.createHorizontalStrut(10); baseBox2.add(button5); baseBox2.add(Box.createHorizontalStrut(10); baseBox =Box.createVerticalBox(); baseBox.add(Box.createVerticalStrut(10); baseBox.add(baseBox1); baseBox.add(Box.createVerticalStrut(10); baseBox.add(baseBox2); baseBox.add(Box.createVerticalStrut(10); add(baseBox); button1.addActionListener(this);/对象添加监视器button2.addActionListener(this);button3.addActionListener(this);button4.addActionListener(this);button5.addActionListener(this);setBounds(300,300,360,120);setVisible(true);setResizable(false);addWindowListener (new WindowAdapter()/增加适配器使窗口正常关闭 public void windowClosing(WindowEvent e) System.exit(0); ); validate(); public void actionPerformed(ActionEvent e)/实现接口方法 double n;if(e.getSource()=button1)/实现加法运算 double n1,n2;try n1=Double.parseDouble(text2.getText();n2=Double.parseDouble(text3.getText();n=n1+n2;text4.setText(String.valueOf(n);label.setText(+);catch(NumberFormatException ee) text4.setText(请输入数字字符); else if(e.getSource()=button2)/实现减法运算 double n1,n2;try n1=Double.parseDouble(text2.getText();n2=Double.parseDouble(text3.getText();n=n1-n2;text4.setText(String.valueOf(n);label.setText(-);catch(NumberFormatException ee) text4.setText(请输入数字字符);else if(e.getSource()=button3)/实现乘法运算 double n1,n2;try n1=Double.parseDouble(text2.getText();n2=Double.parseDouble(text3.getText();n=n1*n2;text4.setText(String.valueOf(n);label.setText(*);catch(NumberFormatException ee) text4.setText(请输入数字字符);else if(e.getSource()=button4)/实现除法运算 double n1,n2;try n1=Double.parseDouble(text2.getText();n2=Double.parseDouble(text3.getText();n=n1/n2;text4.setText(String.valueOf(n);label.setText(/);catch(NumberFormatException ee) text4.setText(请输入数字字符); else if(e.getSource()=button5)/实现复数运算 Complex fushu=new Complex(); fushu.setTitle(复数运算);/设置窗口标题 toFront(); validate();/保证组件正常显示 /标准的windows窗口class MyFrame extends Frame implements ActionListener,ItemListener MenuBar menubar;/声明对象 Menu menu1,menu2,menu3; MenuItem item1,item2,item3,item4,item5,item6,item7,item8; Clipboard clipboard=null; /声明一个剪切板对象 TextArea text,text1; BufferedReader in; FileReader file_reader; BufferedWriter out; FileWriter tofile; FileDialog filedialog_save,filedialog_load; Choice list; JTextArea text0; MyFrame(String s) setTitle(s);/设置窗口标题Toolkit tool=getToolkit(); Dimension dim=tool.getScreenSize();setBounds(100,100,dim.width/2,dim.height/2);/设置窗口出现的初始位置 clipboard=getToolkit().getSystemClipboard(); text1=new TextArea(10,20); /为对象分配内存，使用new和构造方法menubar=new MenuBar();menu1=new Menu(文件);menu2=new Menu(编辑);menu3=new Menu(工具);item1=new MenuItem(打开);item1.setShortcut(new MenuShortcut(KeyEvent.VK_O); item2=new MenuItem(保存); item2.setShortcut(new MenuShortcut(KeyEvent.VK_S); item3=new MenuItem(退出); item3.setShortcut(new MenuShortcut(KeyEvent.VK_E); item4=new MenuItem(剪切); item4.setShortcut(new MenuShortcut(KeyEvent.VK_C); item5=new MenuItem(复制); item5.setShortcut(new MenuShortcut(KeyEvent.VK_P); item6=new MenuItem(粘贴); item6.setShortcut(new MenuShortcut(KeyEvent.VK_V); item7=new MenuItem(计算器); item7.setShortcut(new MenuShortcut(KeyEvent.VK_Q); item1.addActionListener(this);/将窗口作为它的监视器 item2.addActionListener(this);item3.addActionListener(this); item4.addActionListener(this); item5.addActionListener(this);item6.addActionListener(this); item7.addActionListener(this); menu1.add(item1);/调用add()方法添加组件 menu1.add(item2); menu1.add(item3); menu2.add(item4); menu2.add(item5); menu2.add(item6); menu3.add(item7); menubar.add(menu1); menubar.add(menu2); menubar.add(menu3); setMenuBar(menubar);/将菜单条放置到窗口 add(text1); filedialog_save=new FileDialog(this,保存对话框,FileDialog.SAVE); filedialog_load=new FileDialog(this,打开对话框,FileDialog.LOAD); filedialog_load.addWindowListener(new WindowAdapter()/保存对话框增加适配器 public void windowClosing(WindowEvent e) filedialog_load.setVisible(false); ); filedialog_save.addWindowListener(new WindowAdapter()/打开对话框增加适配器 public void windowClosing(WindowEvent e) filedialog_save.setVisible(false); ); addWindowListener(new WindowAdapter() /增加适配器使窗口正常关闭 public void windowActivated(WindowEvent e) public void windowClosing(WindowEvent e) System.exit(0); ); list=new Choice(); text0=new JTextArea(); text0.setForeground(Color.blue); GraphicsEnvironment ge=GraphicsEnvironment.getLocalGraphicsEnvironment(); String fontName=ge.getAvailableFontFamilyNames(); for(int i=0;ifontName.length;i+) list.add(fontNamei); add(list,BorderLayout.NORTH); add(text0,BorderLayout.CENTER); text0.setForeground(Color.red); list.addItemListener(this);setVisible(true);/窗口可见 setResizable(true);/可调整大小validate();/保证组件正确显示 public void itemStateChanged(ItemEvent e) String name=list.getSelectedItem(); Font f=new Font(name,Font.BOLD,32); text0.setFont(f); text0.setText(); public void actionPerformed(ActionEvent e)/实现接口方法 if(e.getSource()=item1) /使用文件对话框打开文件 filedialog_load.setVisible(true); text0.setText(null); String s; if(filedialog_load.getFile()!=null) try File file= new File(filedialog_load.getDirectory(),filedialog_load.getFile(); file_reader=new FileReader(file); in=new BufferedReader(file_reader); while(s=in.readLine()!=null) text0.append(s+n); in.close(); file_reader.close(); catch(IOException e2)System.out.println(打开失败); else if(e.getSource()=item2) /使用文件对话框保存文件 filedialog_save.setVisible(true); if(filedialog_save.getFile()!=null) tryFile file=new File(filedialog_save.getDirectory(),filedialog_save.getFile(); tofile=new FileWriter(file); out=new BufferedWriter(tofile); out.write(text.getText(),0,(text.getText().length(); out.close(); tofile.close(); catch(IOException e2) else if(e.getSource()=item3) /实现退出功能 System.exit(0); else if(e.getSource()=item4) /实现剪切功能 String temp=text0.getSelectedText(); StringSelection text=new StringSelection(temp); clipboard.setContents(text,null); int start=text0.getSelectionStart(); int end =text0.getSelectionEnd(); text0.replaceRange(,start,end) ; /从text1中删除被选取的文本 else if(e.getSource()=item5) /实现复制功能 String temp=text0.getS