Thread: Not able to read from a textfiel the way it's supposed to.

I had been trying to make digital books. However, I wanted to split it into pages and had been wondering if there was a way to store entire chapters and use tags, like html, sort of, to tell it what to put into the text area for each page. I tried something like this and it's kind of working, though it's losing the first word in between each of the tags. I don't care if the tags themselves aren't read in. But how do I get the first words in? This may also lead to Scanner redundancy reading, but would reduce space wise the amount I'd have to use.

   import javax.swing.JTextArea;
   import javax.swing.JScrollPane;
   import javax.swing.JFrame;
   import javax.swing.JPanel;
   import java.io.File;
   import java.util.Scanner;
   import java.awt.GridLayout;
   import java.util.NoSuchElementException;
   import java.io.FileNotFoundException;
   import java.io.BufferedReader;
   import java.io.FileReader;
   import java.io.LineNumberReader;
   import java.io.IOException;
 
   public class FileReadingTesting 
   {
 
      public static void main(String[] args)
      {
 
         Scanner console = null;
         LineNumberReader lnr = null;
         String areaText = "";
         String area2Text = "";
         String area3Text = "";
         try{
            console = new Scanner(new File("Silly.txt"));
         }
 
            catch(FileNotFoundException fnfe)
            {
               System.out.println("Not found.");
            }
 
 
         Scanner lineScanner = null;
         while(console.hasNext())
         {
            //System.out.println(console.next());
            if (console.next().equals("<Page1>"))
            {
 
               while (!console.next().equals("</Page1>"))
               {
                  String nextInputLine = console.nextLine();
 
                  lineScanner = new Scanner(nextInputLine);
 
                  while(lineScanner.hasNext())
                  {
                     areaText = areaText + lineScanner.nextLine();
                  }
 
                  areaText = areaText + "\n";
               }
            }
 
         }
         System.out.println(areaText);
 
 
         JFrame wenguin = new JFrame("Parsing test");
         wenguin.setVisible(true);
         JPanel panel = new JPanel();
         wenguin.setContentPane(panel);
 
 
 
         JTextArea area = new JTextArea(100,100);
         JScrollPane pane = new JScrollPane(area, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
 
         JTextArea area2 = new JTextArea(100,100);
         JScrollPane pane2 = new JScrollPane(area2, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
 
         JTextArea area3 = new JTextArea(100,100);
         JScrollPane pane3 = new JScrollPane(area3, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
 
 
         panel.setLayout(new GridLayout(3,1));
         panel.add(pane);
         panel.add(pane2);
         panel.add(pane3);
         char c = 'a';
         String t = "";
 
 
 
 
 
         area.setText(areaText);
         wenguin.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      }
 
 
   }

It is giving me this:

 

 is a sample paragraph.  It is being used to see if I can only scan part of a document and stop at line breaks.  Hopefully I can.

 it is being used to check to see if I can also stop when a page is done.  Let's see if it works.

But I wanted it to give me this:

 

This is a sample paragraph.  It is being used to see if I can only scan part of a document and stop at line 



breaks.  Hopefully I can.



	Also, it is being used to check to see if I can also stop when a page is done.  Let's see if it works.

How do I fix that?

I added some lines to the text file. It's getting better but it's still not quite working.

   import javax.swing.JTextArea;
   import javax.swing.JScrollPane;
   import javax.swing.JFrame;
   import javax.swing.JPanel;
   import java.io.File;
   import java.util.Scanner;
   import java.awt.GridLayout;
   import java.util.NoSuchElementException;
   import java.io.FileNotFoundException;
   import java.io.BufferedReader;
   import java.io.FileReader;
   import java.io.LineNumberReader;
   import java.io.IOException;
 
   public class FileReadingTesting 
   {
 
      public static void main(String[] args)
      {
 
         Scanner console = null;
         LineNumberReader lnr = null;
         String areaText = "";
         String area2Text = "";
         String area3Text = "";
         try{
            console = new Scanner(new File("Silly.txt"));
         }
 
            catch(FileNotFoundException fnfe)
            {
               System.out.println("Not found.");
            }
 
 
         Scanner lineScanner = null;
         while(console.hasNext())
         {
            int t = 0;
            //System.out.println(console.next());
 
 
            if (console.next().equals("<Page1>"))
            {
 
               String str = console.next();
               if (!str.matches("\\s*</Page1>\\s*"))
               {
                  while (!console.next().equals("</Page1>"))
                  {
                     // areaText = areaText + " " + str;
 
                     String nextInputLine = console.nextLine();
 
 
 
 
 
 
 
 
                     lineScanner = new Scanner(nextInputLine);
 
                     while(lineScanner.hasNext())
                     {
                        areaText = areaText + lineScanner.nextLine();
                     }
 
                     areaText = areaText + "\n";
                  }
               }
            }
         }
 
 
         System.out.println(areaText);
 
 
         JFrame wenguin = new JFrame("Parsing test");
         wenguin.setVisible(true);
         JPanel panel = new JPanel();
         wenguin.setContentPane(panel);
 
 
 
         JTextArea area = new JTextArea(100,100);
         JScrollPane pane = new JScrollPane(area, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
 
         JTextArea area2 = new JTextArea(100,100);
         JScrollPane pane2 = new JScrollPane(area2, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
 
         JTextArea area3 = new JTextArea(100,100);
         JScrollPane pane3 = new JScrollPane(area3, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
 
 
         panel.setLayout(new GridLayout(3,1));
         panel.add(pane);
         panel.add(pane2);
         panel.add(pane3);
         char c = 'a';
         String t = "";
 
 
 
 
 
         area.setText(areaText);
         wenguin.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      }
 
 
 
 
 
 
   }

I added a new line: I can almost get it to work, but it won't quite get the tabs.

Output:

 

a sample paragraph.  It is being used to see if I can only scan part of a document and stop at line breaks.  Hopefully I can.

 it is being used to check to see if I can also stop when a page is done.  Let's see if it works.

 can almost get it to work, but it won't quite get the tabs.

next()
Finds and returns the next complete token from this scanner.

So, be careful while using next(), that will skips the tokens. Instead of using like this, change your

while (!console.next().equals("</Page1>"))

this line into

while (console.hasNext() && !console.nextLine().equals("</Page1>"))

Remove this

if (!str.matches("\\s*</Page1>\\s*"))

statement.

You must see how your code is actually behaving. Don't just stick with the famous "Hit and Miss". Try to think yourself why it's actually ignoring the internal part, coz you are telling it to. It's not the JVM's fault but your code's.
Remove the if as already told and try running your program. You've changed many things in your this code. Add the above given while condition in your very first code you have posted here.

Ok, when I tried it with the second text area, this time using <Page2> </Page2> as the edges, and I wanted it not to read in anything between <Page1> and </Page1> at all, it gave me nothing for the second text area, though the first was fine.

   import javax.swing.JTextArea;
   import javax.swing.JScrollPane;
   import javax.swing.JFrame;
   import javax.swing.JPanel;
   import java.io.File;
   import java.util.Scanner;
   import java.awt.GridLayout;
   import java.util.NoSuchElementException;
   import java.io.FileNotFoundException;
   import java.io.BufferedReader;
   import java.io.FileReader;
   import java.io.LineNumberReader;
   import java.io.IOException;
 
   public class FileReadingTesting 
   {
 
      public static void main(String[] args)
      {
 
         Scanner console = null;
         LineNumberReader lnr = null;
         String areaText = "";
         String area2Text = "";
         String area3Text = "";
         try{
            console = new Scanner(new File("Silly.txt"));
         }
 
            catch(FileNotFoundException fnfe)
            {
               System.out.println("Not found.");
            }
 
 
         Scanner lineScanner = null;
         while(console.hasNext())
         {
            //System.out.println(console.next());
            if (console.next().equals("<Page1>"))
            {
 
               while (console.hasNext() && !console.nextLine().equals("</Page1>"))
               {
                  String nextInputLine = console.nextLine();
 
                  lineScanner = new Scanner(nextInputLine);
 
                  while(lineScanner.hasNext())
                  {
                     areaText = areaText + lineScanner.nextLine();
                  }
 
                  areaText = areaText + "\n" + "\n";
               }
            }
 
         }
 
         while(console.hasNext())
         {
            //System.out.println(console.next());
            if (console.next().equals("<Page2>"))
            {
 
               while (console.hasNext() && !console.nextLine().equals("</Page2>"))
               {
                  String nextInputLine = console.nextLine();
 
                  lineScanner = new Scanner(nextInputLine);
 
                  while(lineScanner.hasNext())
                  {
                     area2Text = area2Text + lineScanner.nextLine();
                  }
 
                  area2Text = area2Text+ "\n" + "\n";
               }
            }
 
         }
 
         System.out.println(areaText);
 
 
         JFrame wenguin = new JFrame("Parsing test");
         wenguin.setVisible(true);
         JPanel panel = new JPanel();
         wenguin.setContentPane(panel);
 
 
 
         JTextArea area = new JTextArea(100,100);
         JScrollPane pane = new JScrollPane(area, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
 
         JTextArea area2 = new JTextArea(100,100);
         JScrollPane pane2 = new JScrollPane(area2, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
 
         JTextArea area3 = new JTextArea(100,100);
         JScrollPane pane3 = new JScrollPane(area3, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
 
 
         panel.setLayout(new GridLayout(3,1));
         panel.add(pane);
         panel.add(pane2);
         panel.add(pane3);
         char c = 'a';
         String t = "";
 
 
 
 
 
         area.setText(areaText);
         area2.setText(area2Text);
         wenguin.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      }
 
 
   }

Should i answer Post#08 or Post#09 ?

Post 8 isn't as import as Post 9. Post 9 should be answered first.

Remember that

while(console.hasNext())

this code hasNext() until it reaches to the end of file. I hope you got the clue now why it's not showing the results between <page2> and </page2>

   import javax.swing.JTextArea;
   import javax.swing.JScrollPane;
   import javax.swing.JFrame;
   import javax.swing.JPanel;
   import java.io.File;
   import java.util.Scanner;
   import java.awt.GridLayout;
   import java.util.NoSuchElementException;
   import java.io.FileNotFoundException;
   import java.io.BufferedReader;
   import java.io.FileReader;
   import java.io.LineNumberReader;
   import java.io.IOException;
 
   public class FileReadingTesting 
   {
 
      public static void main(String[] args)
      {
 
         Scanner console = null;
         LineNumberReader lnr = null;
         String areaText = "";
         String area2Text = "";
         String area3Text = "";
         try{
            console = new Scanner(new File("Silly.txt"));
         }
 
            catch(FileNotFoundException fnfe)
            {
               System.out.println("Not found.");
            }
 
 
         Scanner lineScanner = null;
         while(console.hasNext())
         {
            //System.out.println(console.next());
        	 String temp = console.next();
            if (temp.equals("<Page1>"))
            {
 
               while (console.hasNext() && !console.nextLine().equals("</Page1>"))
               {
                  String nextInputLine = console.nextLine();
 
                  lineScanner = new Scanner(nextInputLine);
 
                  while(lineScanner.hasNext())
                  {
                     areaText = areaText + lineScanner.nextLine();
                  }
 
                  areaText = areaText + "\n" + "\n";
               }
            }else if (temp.equals("<Page2>"))
            {
 
                while (console.hasNext() && !console.nextLine().equals("</Page2>"))
                {
                   String nextInputLine = console.nextLine();
 
                   lineScanner = new Scanner(nextInputLine);
 
                   while(lineScanner.hasNext())
                   {
                      areaText = areaText + lineScanner.nextLine();
                   }
 
                   areaText = areaText + "\n" + "\n";
                }
             } 
         }
 
         while(console.hasNext())
         {
            System.out.println("Hi");
            if (console.next().equals("<Page2>"))
            {
 
               while (console.hasNext() && !console.nextLine().equals("</Page2>"))
               {
                  String nextInputLine = console.nextLine();
 
                  lineScanner = new Scanner(nextInputLine);
 
                  while(lineScanner.hasNext())
                  {
                     area2Text = area2Text + lineScanner.nextLine();
                  }
 
                  area2Text = area2Text+ "\n" + "\n";
               }
            }
 
         }
 
         System.out.println(areaText);
         System.out.println(area2Text);
 
 
         JFrame wenguin = new JFrame("Parsing test");
         wenguin.setVisible(true);
         JPanel panel = new JPanel();
         wenguin.setContentPane(panel);
 
 
 
         JTextArea area = new JTextArea(100,100);
         JScrollPane pane = new JScrollPane(area, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
 
         JTextArea area2 = new JTextArea(100,100);
         JScrollPane pane2 = new JScrollPane(area2, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
 
         JTextArea area3 = new JTextArea(100,100);
         JScrollPane pane3 = new JScrollPane(area3, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
 
 
         panel.setLayout(new GridLayout(3,1));
         panel.add(pane);
         panel.add(pane2);
         panel.add(pane3);
         char c = 'a';
         String t = "";
 
 
 
 
 
         area.setText(areaText);
         area2.setText(area2Text);
         wenguin.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      }
 
 
   }

Your code has been modified. Try this code and see..... Try to understand it as well.

Yeah, remove or comment out this code. New code will be

   import javax.swing.JTextArea;
   import javax.swing.JScrollPane;
   import javax.swing.JFrame;
   import javax.swing.JPanel;
   import java.io.File;
   import java.util.Scanner;
   import java.awt.GridLayout;
   import java.util.NoSuchElementException;
   import java.io.FileNotFoundException;
   import java.io.BufferedReader;
   import java.io.FileReader;
   import java.io.LineNumberReader;
   import java.io.IOException;
 
   public class FileReadingTesting 
   {
 
      public static void main(String[] args)
      {
 
         Scanner console = null;
         LineNumberReader lnr = null;
         String areaText = "";
         String area2Text = "";
         String area3Text = "";
         try{
            console = new Scanner(new File("Silly.txt"));
         }
 
            catch(FileNotFoundException fnfe)
            {
               System.out.println("Not found.");
            }
 
 
         Scanner lineScanner = null;
         while(console.hasNext())
         {
            //System.out.println(console.next());
        	 String temp = console.next();
            if (temp.equals("<Page1>"))
            {
 
               while (console.hasNext() && !console.nextLine().equals("</Page1>"))
               {
                  String nextInputLine = console.nextLine();
 
                  lineScanner = new Scanner(nextInputLine);
 
                  while(lineScanner.hasNext())
                  {
                     areaText = areaText + lineScanner.nextLine();
                  }
 
                  areaText = areaText + "\n" + "\n";
               }
            }else if (temp.equals("<Page2>"))
            {
 
                while (console.hasNext() && !console.nextLine().equals("</Page2>"))
                {
                   String nextInputLine = console.nextLine();
 
                   lineScanner = new Scanner(nextInputLine);
 
                   while(lineScanner.hasNext())
                   {
                      areaText = areaText + lineScanner.nextLine();
                   }
 
                   areaText = areaText + "\n" + "\n";
                }
             } 
         }
 
 
         System.out.println(areaText);
         System.out.println(area2Text);
 
 
         JFrame wenguin = new JFrame("Parsing test");
         wenguin.setVisible(true);
         JPanel panel = new JPanel();
         wenguin.setContentPane(panel);
 
 
 
         JTextArea area = new JTextArea(100,100);
         JScrollPane pane = new JScrollPane(area, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
 
         JTextArea area2 = new JTextArea(100,100);
         JScrollPane pane2 = new JScrollPane(area2, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
 
         JTextArea area3 = new JTextArea(100,100);
         JScrollPane pane3 = new JScrollPane(area3, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
 
 
         panel.setLayout(new GridLayout(3,1));
         panel.add(pane);
         panel.add(pane2);
         panel.add(pane3);
         char c = 'a';
         String t = "";
 
 
 
 
 
         area.setText(areaText);
         area2.setText(area2Text);
         wenguin.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      }
 
 
   }