title: java.lang.StringIndexOutOfBoundsException: String index out of range
body: <p>Hi I wrote a java code to find longest word made of other words. My logic is to read the list of words from the text file and add each word into an array (In the text the words are sorted and there will be only one word in each line) After that we check if each element in the array has other elemnts as substrings. If so we count the number of substrings. The element with maximum number of substrings will be the result</p>
  
  <p>The code is running when I give a text file wih only two words. But when there are more than two words I am getting following error</p>
  
  <p>java.lang.StringIndexOutOfBoundsException: String index out of range: 3</p>
  
  <p>I feel the error is occuring in this line if(s.charAt(i1)==w.charAt(j1))</p>
  
  <pre><code>  import java.util.*;
    import java.io.*;
    import java.lang.reflect.Array;
    public class Parser
    {
  public static void main (String[] args) throws IOException
  {
      String [] addyArray = null;
  
      FileReader inFile = new FileReader ("sample.txt");
      BufferedReader in = new BufferedReader (inFile);
      String line = "";
      int a = 0;
      int size=0;
      String smallestelement = "";
  
      while(in.ready())
      {
          line=in.readLine();
          while (line != null &amp;&amp; line != "\n")
          {
              size++;
              System.out.println(size);
              line = in.readLine();
              if (line == null) line = "\n";
          }
      }
      addyArray = new String[size];
      FileReader inFile2 = new FileReader ("sample.txt");
      BufferedReader in2 = new BufferedReader (inFile2);
      String line2 = "";
  
      while(in2.ready())
      {
          line2 = in2.readLine();
  
  
          while (line2 != null &amp;&amp; line2 != "\n")
          {
  
              addyArray[a] = line2;
  
  
              System.out.println("Array"+addyArray[a]);
              line2 = in.readLine();
              a++;
              if (line2 == null) line2 = "\n";
          }
  
      }
  
  
      int numberofsubstrings=0;
      int[] substringarray= new int[size];
  
      int count=0,no=0;
  
  for(int i=0;i&lt;size;i++)
  {       
      System.out.println("sentence "+addyArray[i]);
      for(int j=0;j&lt;size;j++)
      {
          System.out.println("word "+addyArray[j]);
  
          String w,s;
          s=addyArray[i].trim();
          w=addyArray[j].trim();
  
          try{
              for(int i1=0;i1&lt;s.length();i1++)
              {
                  if(s.equals(w)&amp;&amp; s.indexOf(addyArray[j-1].trim()) == -1)
                  {}
              else
              {
                  if(s.charAt(i1)==w.charAt(0))
                  {                   
                     for(int j1=0;j1&lt;w.length();j1++,i1++)
                     {
                       if(s.charAt(i1)==w.charAt(j1)) //I feel the error is occuring here
                       { count=count+1;}
                         if(count==w.length())
                         {no=no+1;count=0;};  
  
                     }
                  }
                }
              }
                System.out.println(no);
          }
          catch(Exception e){System.out.println(e);}
          substringarray[i]=no;
          no=0;
  
          }
      }   
  
  
  
          for(int i=0;i&lt;size;i++)
          {
              System.out.println("Substring array"+substringarray[i]);
          }
      Arrays.sort(substringarray);  
      int max=substringarray[0];
  
      System.out.println("Final result is"+addyArray[max]+size);
  
  }
      }
  </code></pre>