Compiling Error, Class, Interface or Enum expected

I'm having trouble with my code, I am new to Java and can not seem to understand how to correct the issue. Please review my code and let me know what I am doing wrong. The more detailed the answer the better it would be for me, this is for a homework assignment. I have underlined all the areas where I am getting an error.

package contactinformation;

import java.io.*;
import javax.swing.*;
/**
 *
 * @author Daddy
 */
public class ContactInformation {
    BufferedWriter out;
    
      String name;
      String phone ="";
      String strInput;
      int repeat;       
      int age;  
      String email ="";
    

     /**
     *
     */
        
    public ContactInformation (){
                        
                 //JFrame size
            final int width = 640,
                     height = 480;
            
            JFrame window = new JFrame ("Contact Information Program");
            
            //Width and Height set
            window.setSize(width, height);
            
            //specify what happens when x is clicked
            window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            
            //display the window
                        window.setVisible(true);
 
    do {
         // Used to input name
         name = JOptionPane.showInputDialog(null, "Enter name of  person."
                 + "");
               
        //Used to input age
         strInput = JOptionPane.showInputDialog(null, "Enter the persons "
                 + "age.");
         age = Integer.parseInt(strInput);
        
         //validate age entry between 0-120 
        if (age < 0){
         if (age > 120){
             JOptionPane.showMessageDialog(null, "You have entered a value that"
                     + " is incorrect. Please enter persons age between 0-120."
                     + "");
         }
    }
        else {
                
        //Used to input email address 
        email = JOptionPane.showInputDialog(null, "Enter Email address.");    
        
        //Used to input phone number
        phone = JOptionPane.showInputDialog(null, "Enter Phone Number.");
        }
          
         //did the user need another person added?
              repeat = JOptionPane.showConfirmDialog(null, "Would you like to"
                 + " enter another person's data?", "Please Confirm.", 
                 JOptionPane.YES_NO_OPTION);
              
                  //File created from data entered 
    } while (repeat==JOptionPane.YES_OPTION);
       
      try {
           out = new BufferedWriter(new FileWriter("ContactData.txt", true));
               
           out.write(name + " ");
           out.write(age + " ");
           out.write(email + " ");
           out.write(phone + " " );
           out.newLine();
           out.close();  
           
      } catch (IOException e) {
         System.out.println("There was a problem:" + e);
         
         
      }
    }
     public static void main(String[] args){
            ContactInformation contactInformation = new ContactInformation();
         
    }
            
    }

[u]  public boolean isInteger( String input )[/u]
{
try 
{  
      Integer.parseInt(strInput);   
  [u][/u]    return true;   
}[u][u]   
   catch(NumberFormatException e)   
{  
      System.out.println("Not a number " + e);
[u][/u]      return false;   
 


      /**
 *
 * @author Daddy
 */
}[u][/u]
[u][/u]public class ReadFile
{
          BufferedReader in;
          String read;
	     String output;
          JTextArea show;
          public ReadFile()
          {
              JTextArea show = new JTextArea(20, 40);
	              try

              {
                  //open a buffered reader to file
                  in = new BufferedReader(new FileReader("ContactData.txt"));

                 while ((read = in.readLine()) != null) {
       show.setText(read);
              }
}
              catch(IOException f)
{
                  System.out.println("There is a problem." + f);
}
          }
      }
[u][/u]       public static void main(String[] args) {   

	
       new ContactInformationProgram ();

}[u][/u]