HELP ME FOR DOING AN ASSIGNMENT

Question

Sir,
I got an assignment in Java.I have some doubts regarding this.The assignment is as follows.
There should be a GUI in Swing.The assignment is to append two text files and store(save) the appended file in a new file.Also the appended file has to be displayed in a file viewer as part of this GUI.The two files are to be browsed from the directory using two BROWSE button.A SAVE AS button is necessary to save the file in the destination file.GUI should also contain an APPEND button,a VIEW button,a PAUSE button,a RESUME button and an EXIT button.On clicking the APPEND button,the two text files have to be appended.On clicking the VIEW button,the appended file has to be displayed character by character in a file viewer as part of the GUI.Character by character displaying of the appended file should be performed using multithreading.On clicking the PAUSE button,the file displaying should be paused.On clicking the RESUME button,the file displaying should be continued.EXIT button is for exiting from the GUI.
I have to submit this assignment on 5th Oct,2005.I am a fresher in Java.So I am encountering several problems while doing this project.Please help me out.If you send me the code,I would be very thankful to you.
Sincerely,
Anjali P

Answer 1

I am encountering several problems while doing thisproject.
Please be a little more explicit about what you're
doing, what you expect to happen, and what you
actually observe.
Please post a
short,
concise, executable example of what you're
trying to do. This does not have to be the actual
code you are using. Write a small example that
demonstrates your intent, and only that. Wrap the
code in a class and give it a main method that runs
it - if we can just copy and paste the code into a
text file, compile it and run it without any changes,
then we can be sure that we haven't made incorrect
assumptions about how you are using it.
Post your code between [code] and
[/code] tags. Cut and paste the code, rather
than re-typing it (re-typing often introduces subtle
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Please assume that we only have the core API.
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Help us help you solve your problem.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.io.*;
import java.util.*;
class main_Form extends JFrame implements ActionListener
     JButton b1=new JButton("APPEND");
     JButton b2=new JButton("VIEW");
     JButton b3=new JButton("PAUSE");
     JButton b4=new JButton("RESUME");
     JButton b5=new JButton("BROWSE FILE 1");
     JButton b6=new JButton("BROWSE FILE 2");
     JButton b7=new JButton("EXIT");
     JLabel l1=new JLabel("FILE 1");
     JLabel l2=new JLabel("FILE 2");
     JFrame f=new JFrame();
     JTextField tf1=new JTextField(15);
     JTextField tf2=new JTextField(15);
     TextArea ta= new TextArea("   ", 100, 100);
     JPanel p=new JPanel();
     Container c=getContentPane();
     public main_Form()
          setSize(700,500);
          p.setLayout(null);
          b1.setBounds(10,400,100,20);
          b2.setBounds(120,400,100,20);
          b3.setBounds(240,400,100,20);
          b4.setBounds(360,400,100,20);
          b5.setBounds(550,100,100,20);
          b6.setBounds(550,300,100,20);
          b7.setBounds(480,400,100,20);
          l1.setBounds(400,100,100,20);
          l2.setBounds(400,300,100,20);
          tf1.setBounds(450,100,100,20);
          tf2.setBounds(450,300,100,20);
          ta.setBounds(10,15,300,300);
          p.add(b1);
          p.add(b2);
          p.add(b3);
          p.add(b4);
          p.add(b5);
          p.add(b6);
          p.add(b7);
          p.add(l1);
          p.add(l2);
          p.add(tf1);
          p.add(tf2);
          p.add(ta);
          c.add(p);
          b5.addActionListener(new browseFile1());
          b6.addActionListener(new browseFile2());
          b7.addActionListener(this);
          b1.addActionListener(this);
     class browseFile1 implements ActionListener
          public void actionPerformed(ActionEvent ae)
               JFileChooser fc=new JFileChoose();
               int fVal =fc.showOpenDialog(main_Form.this);
               if(fVal == JFileChooser.APPROVE_OPTION)
                    System.out.println("APP 1");
                    tf1.setText(fc.getSelectedFile()+"");
               if(fVal == JFileChooser.CANCEL_OPTION)
                    tf1.setText("");
     class browseFile2 implements ActionListener
          public void actionPerformed(ActionEvent ae)
               JFileChooser fc=new JFileChooser();
               int fVal =fc.showOpenDialog(main_Form.this);
               if(fVal == JFileChooser.APPROVE_OPTION)
                    System.out.println("APP 2");
                    tf2.setText(fc.getSelectedFile()+"");
               if(fVal == JFileChooser.CANCEL_OPTION)
                    tf2.setText("");
     public void actionPerformed(ActionEvent ae)
          if(ae.getSource().equals(b7))
          this.hide();
          if(ae.getSource().equals(b1))
               try
                    FileInputStream f1=new FileInputStream(tf1.getText()+"");
                FileInputStream f2=new FileInputStream(tf2.getText()+"");
                  FileOutputStream outStream = new FileOutputStream("file3.txt");
                  SequenceInputStream f3=new SequenceInputStream(f1,f2);
                  int c=0;
                while((c=f3.read())!=-1)
                         outStream.write((char)c);
                         System.out.println((char)c);
               catch(Exception e)
                    System.out.println(e+"f1 file nt found");
            File f=new File("file3.txt");
     public static void main(String[] args)
          main_Form m1=new main_Form();
          m1.show();
          System.out.println("Hello World!");
}Sir,
This is only what i did.I dont have enough idea about multithreading.So I failed in writing the code for VIEW button,PAUSE button,RESUME button.This is the problem I am facing.The following is the attempt which I have made in writing the code for VIEW button.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.io.*;
import java.util.*;
import java.lang.Thread;
import java.lang.System;
class main_Form1 extends JFrame implements ActionListener
     JButton b1=new JButton("APPEND");
     JButton b2=new JButton("VIEW");
     JButton b3=new JButton("PAUSE");
     JButton b4=new JButton("RESUME");
     JButton b5=new JButton("BROWSE FILE 1");
     JButton b6=new JButton("BROWSE FILE 2");
     JButton b7=new JButton("EXIT");
     JLabel l1=new JLabel("FILE 1");
     JLabel l2=new JLabel("FILE 2");
     JFrame f=new JFrame();
     JTextField tf1=new JTextField(15);
     JTextField tf2=new JTextField(15);
     TextArea ta= new TextArea("   ", 100, 100);
     JPanel p=new JPanel();
     Container c=getContentPane();
     public main_Form1()
          setSize(700,500);
          p.setLayout(null);
          b1.setBounds(10,400,100,20);
          b2.setBounds(120,400,100,20);
          b3.setBounds(240,400,100,20);
          b4.setBounds(360,400,100,20);
          b5.setBounds(550,100,100,20);
          b6.setBounds(550,300,100,20);
          b7.setBounds(480,400,100,20);
          l1.setBounds(400,100,100,20);
          l2.setBounds(400,300,100,20);
          tf1.setBounds(450,100,100,20);
          tf2.setBounds(450,300,100,20);
          ta.setBounds(10,15,300,300);
          p.add(b1);
          p.add(b2);
          p.add(b3);
          p.add(b4);
          p.add(b5);
          p.add(b6);
          p.add(b7);
          p.add(l1);
          p.add(l2);
          p.add(tf1);
          p.add(tf2);
          p.add(ta);
          c.add(p);
          b5.addActionListener(new browseFile1());
          b6.addActionListener(new browseFile2());
          b7.addActionListener(this);
          b1.addActionListener(this);
                b2.addActionListener(this);
     class browseFile1 implements ActionListener
          public void actionPerformed(ActionEvent ae)
               JFileChooser fc=new JFileChooser();
               int fVal =fc.showOpenDialog(main_Form1.this);
               if(fVal == JFileChooser.APPROVE_OPTION)
                    System.out.println("APP 1");
                    tf1.setText(fc.getSelectedFile()+"");
               if(fVal == JFileChooser.CANCEL_OPTION)
                    tf1.setText("");
     class browseFile2 implements ActionListener
          public void actionPerformed(ActionEvent ae)
               JFileChooser fc=new JFileChooser();
               int fVal =fc.showOpenDialog(main_Form1.this);
               if(fVal == JFileChooser.APPROVE_OPTION)
                    System.out.println("APP 2");
                    tf2.setText(fc.getSelectedFile()+"");
               if(fVal == JFileChooser.CANCEL_OPTION)
                    tf2.setText("");
     public void actionPerformed(ActionEvent ae)
          if(ae.getSource().equals(b7))
          this.hide();
          if(ae.getSource().equals(b1))
               try
                    FileInputStream f1=new FileInputStream(tf1.getText()+"");
                FileInputStream f2=new FileInputStream(tf2.getText()+"");
                  FileOutputStream outStream = new FileOutputStream("file3.txt");
                  SequenceInputStream f3=new SequenceInputStream(f1,f2);
                  int c=0;
                while((c=f3.read())!=-1)
                         outStream.write((char)c);
                         System.out.println((char)c);
               catch(Exception e)
                    System.out.println(e+"f1 file nt found");
            File f=new File("file3.txt");
                    if(ae.getSource().equals(b2))
                              try
                        public void run()
                              // FileInputStream inStream = new FileInputStream("file3.txt");   
                        int c=0;
                        while((c=f3.read())!=-1)
                         ta.setText((char)c);
                         System.out.println("HaiAnju"+(char)c);
                                        Thread.sleep(1000);
                              }catch(Exception e){System.out.println(e+"Run Exception");}
     public static void main(String[] args)
          main_Form1 m1=new main_Form1();
          m1.show();
          m1.start();
          System.out.println("Hello World!");
        }