title: Error: unreported exception java.io.FileNotFoundException; must be caught or declared to be thrown
body: <p>I am trying to code a telephone directory for my java project (MATSEC 'O' Levels equivalent to the British GCSE) and while coding (using BlueJ) this error pops up. I am using my teacher's book as a reference and there is nothing related to the error and it doesn't say that I should add anything to it. Here is my java code (Not the main class):</p>
  
  <pre><code>import java.io.*;
  
  class Data{
      String read(){  
  
          String[] name = null;
          String[] surname = null;
          String[] company = null;
          String[] house = null;
          String[] street = null;
          String[] locality = null;
          String[] telno = null;
          String[] mobno = null;
          int entnum;
  
  
  
          BufferedReader txt = new BufferedReader(new FileReader("Directory.txt"));
  
          System.out.println("Name\tSurname\tCompany\tHouse\tStreet\tLocality\tTelephone\tMobile");
              System.out.println("\n-----------------------------------------------------------------------------------------------");
  
          for(entnum = 0;name[entnum]!= null; entnum++){
              name[entnum] = txt.readLine();
              surname[entnum] = txt.readLine();
              company[entnum] = txt.readLine();
              house[entnum] = txt.readLine();
              street[entnum] = txt.readLine();
              locality[entnum] = txt.readLine();
              telno[entnum] = txt.readLine();
              mobno[entnum] = txt.readLine();
  
              System.out.print(name[entnum]+ "\t");
              System.out.print(surname[entnum]+ "\t");
              System.out.print(company[entnum]+ "\t");
              System.out.print(house[entnum]+ "\t");
              System.out.print(street[entnum]+ "\t");
              System.out.print(locality[entnum]+ "\t");
              System.out.print(telno[entnum]+ "\t");
              System.out.print(mobno[entnum]+ "\t\n");
  
              }
          return null;
      }
  }
  </code></pre>
  
  <p>Basically, this simply reads from a text file and displays the entries. I am not yet using GUI.</p>