Java学习资料 Java练习代码 Java基础语法，日常代码练习

import javax.swing.*; import java.awt.*; import java.awt.event.*; import java.util.*; import java.io.*; import java.awt.SplashScreen; public class CalendarWindow extends JFrame implements ActionListener, MouseListener, FocusListener { int year, month, day; CalendarMessage calendarMessage; CalendarPad calendarPad; NotePad notePad; JTextField showYear, showMonth; JTextField showDay[]; CalendarImage calendarImage; String picturename;//图像名称； String getPicture_address; Clock clock; JButton nextYear, previousYear, nextMonth, previousMonth; JButton saveDailyRecord, deleteDailyRecord, readDailyRecord; File dir; Color backColor = Color.white; public CalendarWindow() { dir = new File("./dailyRecord"); dir.mkdir(); showDay = new JTextField[42]; for (int i = 0; i < showDay.length; i++) { showDay[i] = new JTextField(); showDay[i].setBackground(backColor); showDay[i].setLayout(new GridLayout(3, 3)); showDay[i].addMouseListener(this); showDay[i].addFocusListener(this); } calendarMessage = new CalendarMessage(); calendarPad = new CalendarPad(); notePad = new NotePad(); Calendar calendar = Calendar.getInstance(); calendar.setTime(new Date()); year = calendar.get(Calendar.YEAR); month = calendar.get(Calendar.MONTH) + 1; day = calendar.get(Calendar.DAY_OF_MONTH); calendarMessage.setYear(year); calendarMessage.setMonth(month); calendarMessage.setDay(day); calendarPad.setCalendarMessage(calendarMessage); calendarPad.setShowDayTextField(showDay); notePad.setMessage(year, month, day); calendarPad.showMonthCalendar(); doMark(); calendarImage = new CalendarImage(); picturename = getPicture_address();// calendarImage.setImageFile(new File(picturename)); JMenuBar menuBar = new JMenuBar(); JMenu menusetting = new JMenu(); JMenuItem changepicture = new JMenuItem(); menusetting.setText("图像");//设置标题 changepicture.setText("更改图片背景");//设置标题 //添加菜单条上去； menusetting.add(changepicture); menuBar.add(menusetting); setJMenuBar(menuBar); //注册监听器 changepicture.addActionListener(this); clock = new Clock(); JSplitPane splitV1 = new JSplitPane(JSplitPane.VERTICAL_SPLIT, calendarPad, calendarImage); JSplitPane splitV2 = new JSplitPane(JSplitPane.VERTICAL_SPLIT, notePad, clock); JSplitPane splitH = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT, splitV1, splitV2); add(splitH, BorderLayout.CENTER); showYear = new JTextField("" + year, 6); showYear.setFont(new Font("TimesRoman", Font.BOLD, 12)); showYear.setHorizontalAlignment(JTextField.CENTER); showMonth = new JTextField("" + month, 4); showMonth.setFont(new Font("TimesRoman", Font.BOLD, 12)); showMonth.setHorizontalAlignment(JTextField.CENTER); nextYear = new JButton("下年"); previousYear = new JButton("上年"); nextMonth = new JButton("下月"); previousMonth = new JButton("上月"); nextYear.addActionListener(this); previousYear.addActionListener(this); nextMonth.addActionListener(this); previousMonth.addActionListener(this); showYear.addActionListener(this); JPanel north = new JPanel(); north.add(previousYear); north.add(showYear); north.add(nextYear); north.add(previousMonth); north.add(showMonth); north.add(nextMonth); add(north, BorderLayout.NORTH); saveDailyRecord = new JButton("保存日志"); deleteDailyRecord = new JButton("删除日志"); readDailyRecord = new JButton("读取日志"); saveDailyRecord.addActionListener(this); deleteDailyRecord.addActionListener(this); readDailyRecord.addActionListener(this); JPanel pSouth = new JPanel(); pSouth.add(saveDailyRecord); pSouth.add(deleteDailyRecord); pSouth.add(readDailyRecord); add(pSouth, BorderLayout.SOUTH); setVisible(true); setBounds(70, 70, 770, 500); validate(); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } public String getPicture_address() { String address = null; try { FileInputStream outOne = new FileInputStream("picture_address.txt"); ObjectInputStream outTwo = new ObjectInputStream(outOne); try { address = (String) outTwo.readObject(); } catch (Exception ex) { } outTwo.close(); } catch (IOException eee) { } if (address != null) { return address; } else { return "picture.jpg"; } } public void actionPerformed(ActionEvent e) { if (e.getActionCommand().equals("更改图片背景")) { FileDialog dia = new FileDialog(this, "选定图片", FileDialog.LOAD);//新建一个文件选择对 话框，用 dia 获得选择得到的信息； dia.setModal(true);//设置为模态对话框； dia.setVisible(true); //将取得的内容存入“picture_address.txt”文件中， 下次打开软件时还能记住上次的图片路径的选择； if ((dia.getDirectory() != null) && (dia.getFile() != null)) //如果得到的路径和文件名不为空； { try { FileOutputStream inOne = new FileOutputStream("picture_address.txt"); ObjectOutputStream inTwo = new ObjectOutputStream(inOne); inTwo.writeObject(dia.getDirectory() + dia.getFile()); inTwo.close(); } catch (IOException ee) { } picturename = getPicture_address(); //从文件中读出显示图片的路径地址； calendarImage.setImageFile(new File(picturename)); //将获得路径传给图片， 显示该路径指定的图片 } } if (e.getSource() == nextYear) { year++; showYear.setText("" + year); calendarMessage.setYear(year); calendarPad.setCalendarMessage(calendarMessage); calendarPad.showMonthCalendar(); notePad.setMessage(year, month, day); doMark(); } else if (e.getSource() == previousYear) { year--; showYear.setText("" + year); calendarMessage.setYear(year); calendarPad.setCalendarMessage(calendarMessage); calendarPad.showMonthCalendar(); notePad.setMessage(year, month, day); doMark(); } else if (e.getSource() == nextMonth) { month++; if (month > 12) month = 1; showMonth.setText("" + month); calendarPad.setCalendarMessage(calendarMessage); calendarPad.showMonthCalendar(); notePad.setMessage(year, month, day); doMark(); } else if (e.getSource() == previousMonth) { month--; if (month < 1) month = 12; showMonth.setText("" + month); calendarPad.setCalendarMessage(calendarMessage); calendarPad.showMonthCalendar(); notePad.setMessage(year, month, day); doMark(); } else if (e.getSource() == showYear) { String s = showYear.getText().trim(); char a[] = s.toCharArray(); boolean boo = false; for (int i = 0; i < a.length; i++) { if (!(Character.isDigit(a[i]))) boo = true; } if (boo == true)