1 import java.io.*;
 2 import java.awt.*;
 3 import java.awt.event.*;
 4 
 5 public class ReadingHead extends Frame implements MouseListener {
 6         private Button quit, read;
 7         private TextArea text;
 8 
 9         public static void main(String args[]) {
10             new ReadingHead();
11         }
12         
13         public ReadingHead () {
14             super("ReadingHead");
15             this.setLayout(new BorderLayout());
16             
17             Panel p = new Panel();
18             p.setLayout(new GridLayout(1,2));
19             this.add(p, BorderLayout.SOUTH);
20             
21             // Quit
22             quit = new Button("Quit");
23             quit.addMouseListener(this);
24             p.add(quit);
25             
26             // Read
27             read = new Button("Read File");
28             read.addMouseListener(this);
29             p.add(read);
30             
31             // Text Area
32             text = new TextArea();
33             this.add(text, BorderLayout.CENTER);
34             
35             // show
36             this.setSize(320,240);
37             this.setVisible(true);
38         }
39 
40     public void mouseClicked(MouseEvent mouseEvent) {
41         if(mouseEvent.getSource() instanceof Button) {
42             Button s = (Button) mouseEvent.getSource();
43             
44             if(s == quit) {
45                 System.exit(0);
46             } else if(s == read) {
47                 try {
48                     File f = new File("/etc/hostconfig");
49                     FileReader fr = new FileReader(f);
50                     BufferedReader br = new BufferedReader(fr);
51                     
52                     String total = "";
53                     String l = br.readLine();
54                     
55                     while(l != null) {
56                         total = total + l + '\n';
57                         l = br.readLine();
58                     }
59                     
60                     text.setText(total);
61                 } catch (FileNotFoundException fnf) {
62                     text.setText("File not found");
63                 } catch(IOException io) {
64                     text.setText("Couldn't read file");
65                 } 
66             }
67         }
68     }
69 
70     public void mousePressed(MouseEvent mouseEvent) {
71     }
72 
73     public void mouseReleased(MouseEvent mouseEvent) {
74     }
75 
76     public void mouseEntered(MouseEvent mouseEvent) {
77     }
78 
79     public void mouseExited(MouseEvent mouseEvent) {
80     }
81 }