java实现极简单的 TXT小说阅读器

1. public class Display_txt extends JFrame {  
2.       
3.     JFrame jframe = new JFrame();  
4.     JTextArea content;  
5.     boolean flag = true;  
6.     String str_filePath = null;  
7.       
8.     public Display_txt(){  
9.         //输入框  
10.         content = new JTextArea(10,50);  
11.         content.setAutoscrolls(true);  
12.         JScrollPane contentScroll = new JScrollPane(content);  
13.         content.setBorder(BorderFactory.createBevelBorder(1));  
14.         JPanel upper = new JPanel(new BorderLayout());  
15.         upper.add(contentScroll);  
16.         //按钮  
17.         JButton filePath = new JButton("打开文件");  
18.         filePath.addActionListener(new ActionListener(){  
19.             public void actionPerformed(ActionEvent e){  
20.                 try{  
21.                     JFileChooser jfc = new JFileChooser();  
22.                     if(jfc.showOpenDialog(jframe)==JFileChooser.APPROVE_OPTION ){  
23.                         str_filePath = jfc.getSelectedFile().getAbsolutePath();  
24.                     }  
25.                     BufferedReader bufferedReader = new BufferedReader(new FileReader(str_filePath));  
26.                     String str_line;  
27.                     while((str_line=bufferedReader.readLine())!=null){  
28.                         if(flag){  
29.                             content.setText(str_line);  
30.                             flag = false;  
31.                         }  
32.                         else{  
33.                             content.setText(content.getText()+"\n"+str_line);  
34.                         }  
35.                     }  
36.                     bufferedReader.close();  
37.                 }catch(FileNotFoundException e1){  
38.                     e1.printStackTrace();  
39.                 }catch(IOException e2){  
40.                     e2.printStackTrace();  
41.                 }  
42.             }  
43.         });  
44.         JPanel buttonp = new JPanel();  
45.         buttonp.add(filePath);  
46.         JPanel all = new JPanel(new GridLayout(1,1));  
47.         all.add(upper);  
48.         jframe.add(buttonp,BorderLayout.SOUTH);  
49.         jframe.add(all,BorderLayout.CENTER);  
50.         jframe.pack();  
51.         Toolkit tool = Toolkit.getDefaultToolkit();  
52.         Dimension screen = tool.getScreenSize();  
53.         jframe.setLocation(screen.width/2-jframe.getWidth()/2,screen.height/2-jframe.getHeight()/2);  
54.         jframe.setTitle("TXT小说阅读器");  
55.         jframe.setVisible(true);  
56.         jframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);  
57.     }  
58.       
59.     public static void main(String args[]){  
60.         Display_txt display_demo = new Display_txt();  
61.     }  
62.   
63. }