種子論壇 | 高雄市資訊培育協會學員討論區

import java.awt.Font;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane;
//import javax.swing.JDialog;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.ImageIcon;
import javax.swing.UIManager;
import javax.swing.border.BevelBorder;
import javax.swing.filechooser.FileNameExtensionFilter;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
public class Ch08 implements ActionListener{
String title="My Editor";
JFrame fm;
JScrollPane sp;
JTextArea ta;
ImageIcon ic,ic_cut,ic_exit,ic_new,ic_open,ic_paste,ic_save,ic_copy,ic_selectall,ic_about,ic_developer;
JMenuBar mb;
JMenu mn_file,mn_edit,mn_help;
JMenuItem mi_new,mi_open,mi_save,mi_exit,mi_copy,mi_paste,mi_cut,mi_selectall,mi_about;
JFileChooser fc;
FileNameExtensionFilter filter1;
void initialize()
{
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (Exception e){}
filter1=new FileNameExtensionFilter("純文字文件","txt");
fc=new JFileChooser();
//fc.addChoosableFileFilter(filter1);
fc.setFileFilter(filter1);
ic=new ImageIcon(Ch08.class.getResource("pic/editor.png"));
ic_cut=new ImageIcon(Ch08.class.getResource("pic/cut.png"));
ic_exit=new ImageIcon(Ch08.class.getResource("pic/exit.png"));
ic_new=new ImageIcon(Ch08.class.getResource("pic/new.png"));
ic_open=new ImageIcon(Ch08.class.getResource("pic/open.png"));
ic_paste=new ImageIcon(Ch08.class.getResource("pic/paste.png"));
ic_save=new ImageIcon(Ch08.class.getResource("pic/save.png"));
ic_copy=new ImageIcon(Ch08.class.getResource("pic/copy.png"));
ic_selectall=new ImageIcon(Ch08.class.getResource("pic/selectall.png"));
ic_about=new ImageIcon(Ch08.class.getResource("pic/about.png"));
ic_developer=new ImageIcon(Ch08.class.getResource("pic/developer.png"));
mi_new=new JMenuItem("開新檔案",ic_new);
mi_new.addActionListener(this);
mi_open=new JMenuItem("開啟舊檔",ic_open);
mi_open.addActionListener(this);
mi_save=new JMenuItem("儲存檔案",ic_save);
mi_save.addActionListener(this);
mi_exit=new JMenuItem("結束",ic_exit);
mi_exit.addActionListener(this);
mi_copy=new JMenuItem("複製",ic_copy);
mi_copy.addActionListener(this);
mi_paste=new JMenuItem("貼上",ic_paste);
mi_paste.addActionListener(this);
mi_cut=new JMenuItem("剪下",ic_cut);
mi_cut.addActionListener(this);
mi_selectall=new JMenuItem("全選",ic_selectall);
mi_selectall.addActionListener(this);
mi_about=new JMenuItem("關於 My Editor",ic_about);
mi_about.addActionListener(this);
mn_file=new JMenu(" 檔案(F) ");
mn_file.setMnemonic('F'); //設定快速鍵
mn_file.add(mi_new);
mn_file.add(mi_open);
mn_file.add(mi_save);
mn_file.addSeparator(); //分隔線
mn_file.add(mi_exit);
mn_edit=new JMenu(" 編輯(E) ");
mn_edit.setMnemonic('E'); //設定快速鍵
mn_edit.add(mi_copy);
mn_edit.add(mi_paste);
mn_edit.add(mi_cut);
mn_edit.addSeparator();
mn_edit.add(mi_selectall);
mn_help=new JMenu(" 說明(H) ");
mn_help.setMnemonic('H'); //設定快速鍵
mn_help.add(mi_about);
mb=new JMenuBar();
mb.setBorder(new BevelBorder(BevelBorder.RAISED)); //設定具陰影效果的邊框
mb.add(mn_file);
mb.add(mn_edit);
mb.add(mn_help);
ta=new JTextArea();
ta.setFont(new Font("新細明體", Font.PLAIN, 18));
ta.setLineWrap(true); //自動換行
sp=new JScrollPane(ta);
fm=new JFrame(title+" - 未命名");
fm.setBounds(100, 100, 500, 350);
fm.setIconImage(ic.getImage());
fm.setVisible(true);
fm.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
fm.add(sp);
fm.setJMenuBar(mb);
}
Ch08()
{
initialize();
}
public void actionPerformed(ActionEvent e)
{
if(e.getSource()==mi_new)
{
ta.setText("");
fm.setTitle(title+" - 未命名");
}
else if(e.getSource()==mi_open)
{
int ret=fc.showOpenDialog(null);
if(ret==JFileChooser.APPROVE_OPTION)
{
try
{
String str;
File fi=fc.getSelectedFile();
BufferedReader br=new BufferedReader(new FileReader(fi.getAbsolutePath()));
ta.setText(br.readLine());
do
{
str=br.readLine();
if(str==null)
break;
ta.append("\n"+str);
}while(true);
br.close();
fm.setTitle(title+" - "+fc.getName(fi));
}catch(Exception ex){}
}
}
else if(e.getSource()==mi_save)
{
int ret=fc.showSaveDialog(null);
if(ret==JFileChooser.APPROVE_OPTION)
{
try
{
File fi=fc.getSelectedFile();
BufferedWriter bw;
String ext=fi.getAbsolutePath().substring(fi.getAbsolutePath().length()-4); //file extension 副檔名
System.out.println(ext);
String fiPath="";
if(fc.getFileFilter()==filter1)
{
if(ext.equals(".txt"))
fiPath=fi.getAbsolutePath();
else
fiPath=fi.getAbsolutePath()+".txt";
}
else
fiPath=fi.getAbsolutePath();
bw=new BufferedWriter(new FileWriter(fiPath));
bw.write(ta.getText().replaceAll("\n", "\r\n"));
//windows下的文字檔分行符號:\r\n linux/unix下的文字檔分行符號:\r Mac下的文字檔分行符號:\n
bw.flush();
bw.close();
fm.setTitle(title+" - "+fc.getName(fi));
}catch(Exception ex){}
}
}
else if(e.getSource()==mi_exit)
System.exit(0);
else if(e.getSource()==mi_copy)
ta.copy();
else if(e.getSource()==mi_paste)
ta.paste();
else if(e.getSource()==mi_cut)
ta.cut();
else if(e.getSource()==mi_selectall)
ta.selectAll();
else if(e.getSource()==mi_about)
{
String msg="本軟體由社團法人高雄市資訊培育協會青少年程式設計班學員\n林宇翔所開發，感謝您的使用！";
JOptionPane.showMessageDialog(fm,msg,"關於 My Editor",JOptionPane.INFORMATION_MESSAGE,ic_developer);
}
}
public static void main(String[] args) {
new Ch08();
}
}

複製代碼