java 计算器小程序_java应用小程序计算器

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以前用JBuilder2006写的记事本应该可以帮636f70793231313335323631343130323136353331333231626361你记的类名一样要和文件名一样

要给我加分哦

import java.io.*;

import java.util.Calendar;

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

public class NoteBook extends JFrame implements ActionListener,ItemListener,WindowListener,MouseListener{

Container c = this.getContentPane();

JMenuBar jmb = new JMenuBar();

JColorChooser jcc = new JColorChooser();

JMenu jm1 = new JMenu("文件(F)");

JMenu jm2 = new JMenu("编辑(E)");

JMenu jm3 = new JMenu("格式(O)");

JMenu jm4 = new JMenu("查看(V)");

JMenu jm5 = new JMenu("帮助(H)");

JMenuItem jmi1 = new JMenuItem("新建(N)");

JMenuItem jmi2 = new JMenuItem("打开(O)");

JMenuItem jmi3 = new JMenuItem("保存(S)");

JMenuItem jmi4 = new JMenuItem("退出(X)");

JMenuItem jmi5 = new JMenuItem("撤消(U)");

JMenuItem jmi6 = new JMenuItem("复制(C)");

JMenuItem jmi7 = new JMenuItem("粘贴(P)");

JMenuItem jmi8 = new JMenuItem("剪切(T)");

JMenuItem jmi12 = new JMenuItem("日期和时间");

JMenuItem jmi9 = new JMenuItem("字体(E)");

JCheckBoxMenuItem jcbmi = new JCheckBoxMenuItem("自动换行(W)");

JMenuItem jmi10 = new JMenuItem("删除(S)");

JMenuItem jmi11 = new JMenuItem("背景颜色(H)");

JTextArea jta = new JTextArea(15,15);

JScrollPane jsp = new JScrollPane(jta);

//PupolMenu pm = new Pupolmenu();

NoteBook(){

this.addWindowListener(this);

c.setLayout(new BorderLayout());

c.add(jmb,BorderLayout.NORTH);

this.setTitle("新建文本文档");

jmb.add(jm1);

jm1.setMnemonic('f');

jm1.addActionListener(this);

jmb.add(jm2);

jm2.setMnemonic('e');

jmb.add(jm3);

jm3.setMnemonic('o');

jmb.add(jm4);

jm4.setMnemonic('v');

jmb.add(jm5);

jm5.setMnemonic('h');

jm1.add(jmi1);

jmi1.addActionListener(this);

jmi1.setAccelerator(KeyStroke.getKeyStroke('N',Event.CTRL_MASK,false));

jm1.addSeparator();

jm1.add(jmi2);

jmi2.setAccelerator(KeyStroke.getKeyStroke('O',Event.CTRL_MASK,false));

jmi2.addActionListener(this);

jm1.addSeparator();

jm1.add(jmi3);

jmi3.setAccelerator(KeyStroke.getKeyStroke('S',Event.CTRL_MASK,false));

jmi3.addActionListener(this);

jm1.addSeparator();

jm1.add(jmi4);

jmi1.setMnemonic('n');

jmi2.setMnemonic('o');

jmi3.setMnemonic('s');

jmi4.setMnemonic('x');

jmi4.addActionListener(this);

jm2.add(jmi5);

jm2.addSeparator();

jm2.add(jmi6);

jm2.addSeparator();

jm2.add(jmi7);

jm2.addSeparator();

jm2.add(jmi8);

jm2.add(jmi12);

jmi12.addActionListener(this);

jm3.add(jcbmi);

jcbmi.addItemListener(this);

jm3.addSeparator();

jm3.add(jmi9);

jm4.add(jmi10);

jmi10.addActionListener(this);

jm5.add(jmi11);

jmi11.addActionListener(this);

c.add(jsp);

this.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

this.setSize(500,500);

this.setVisible(true);

}

public void actionPerformed(ActionEvent e){

if(e.getSource()==jmi1){

jta.setText("");

this.setTitle("无标题 - 记事本");

}

if(e.getSource()==jmi2){

File f1;

JFileChooser jfc1 = new JFileChooser();

int num1 = jfc1.showOpenDialog(this);

if(num1==JFileChooser.APPROVE_OPTION){

try{

f1 = jfc1.getSelectedFile();

this.setTitle(f1.getName());

FileReader fr = new FileReader(f1);

BufferedReader br = new BufferedReader(fr);

String str;

while((str = br.readLine())!=null){

jta.setText(str);

}

fr.close();

br.close();

}catch(FileNotFoundException e1){

e1.printStackTrace();

}catch(IOException e2){

e2.printStackTrace();

}

if(e.getSource()==jmi3){

File f2 = null;

JFileChooser jfc2 = new JFileChooser();

int num2 = jfc2.showSaveDialog(this);

if(num2==JFileChooser.APPROVE_OPTION){

f2=jfc2.getSelectedFile();

this.setTitle(f2.getName());

try{

FileWriter fw = new FileWriter(f2);

BufferedWriter bw = new BufferedWriter(fw);

bw.write(jta.getText());

bw.close();

fw.close();

}catch(IOException e2){

e2.printStackTrace();

}

if(e.getSource()==jmi4){

int a = JOptionPane.showConfirmDialog(this,"文件已被改变，是否要保存？","提示",JOptionPane.YES_NO_CANCEL_OPTION);

if(a==1){

this.dispose();

}else if(a==0){

File f2 = null;

JFileChooser jfc2 = new JFileChooser();

int num2 = jfc2.showSaveDialog(this);

if(num2==JFileChooser.APPROVE_OPTION){

f2=jfc2.getSelectedFile();

this.setTitle(f2.getName());

try{

FileWriter fw = new FileWriter(f2);

BufferedWriter bw = new BufferedWriter(fw);

bw.write(jta.getText());

bw.close();

fw.close();

}catch(IOException e2){

e2.printStackTrace();

}

this.dispose();

}

if(e.getSource()==jmi12){

Calendar c1 =Calendar.getInstance();

int y = c1.get(Calendar.YEAR);

int m = c1.get(Calendar.MONTH);

int d = c1.get(Calendar.DATE);

int h = c1.get(Calendar.HOUR);

int m1 = c1.get(Calendar.MINUTE);

int m2 = m+1;

jta.setText(y+"年"+m2+"月"+d+"日"+h+":"+m1);

}

if(e.getSource()==jmi11){

Color ccc = JColorChooser.showDialog(this,"color",Color.BLACK);

jta.setSelectedTextColor(ccc);

jta.setBackground(ccc);

}

if(e.getSource()==jmi10){

jta.replaceRange("",jta.getSelectionStart(),jta.getSelectionEnd());

}

public void itemStateChanged(ItemEvent e2){

if(e2.getItemSelectable()==jcbmi){

jta.setLineWrap(true);

}else

jta.setLineWrap(false);

}

public static void main(String[] args){

new NoteBook();

}

public void windowOpened(WindowEvent arg0) {

}

public void windowClosing(WindowEvent arg0) {

int a = JOptionPane.showConfirmDialog(this,"文件已被改变，是否要保存？","提示",JOptionPane.YES_NO_CANCEL_OPTION);

if(a==1){

this.dispose();

}else if(a==0){

File f2 = null;

JFileChooser jfc2 = new JFileChooser();

int num2 = jfc2.showSaveDialog(this);

if(num2==JFileChooser.APPROVE_OPTION){

f2=jfc2.getSelectedFile();

this.setTitle(f2.getName());

try{

FileWriter fw = new FileWriter(f2);

BufferedWriter bw = new BufferedWriter(fw);

bw.write(jta.getText());

bw.close();

fw.close();

}catch(IOException e2){

e2.printStackTrace();

}

if(a==2){

????/????????????????????????????????????????????????????????????????//

}

public void windowClosed(WindowEvent arg0) {

}

public void windowIconified(WindowEvent arg0) {