Question

I just finished this program where the program reads a text file of full names , first and last name, and a zip code. It reads the items then stores the first name and last name and zipcodes as an objects and prints the items.   However, when i use my text file i get this error

"Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: Index 1 out of bounds for length 1 "

I notice this issue only happens when the names are formatted by tabs inbetween. For example:

"Firstname Lastname 90210" <-- this prints normally because there is only a space in between each value

"Firstname (tab) Lastname (tab) 90210" <--- Does not print because of the tab spaces but I need it to print in this fashion!

Please help me fix this annoying issue! Thank you!

Please remember the names are read from a txt file thats been pre-created. Not user inputted values.

import java.io.*;
class Details//stores the firstname, lastname and zip
{
   String firstname, lastname, zip;
   public Details(String a, String b, String c)//constructor
   {
       firstname = a;lastname = b;zip = c;
   }
   public String getFirstName()//getter methods
   {
       return firstname;
   }
   public String getLastName()
   {
       return lastname;
   }
   public String getZip()
   {
       return zip;
   }
}
public class A {

   public static void main(String[] args)

   {
       Details details[] = new Details[25];int i=0;
     
       BufferedReader reader;
    
       try
       {
           reader = new BufferedReader(new FileReader("myfile.txt"));//reader object for file
           String line = reader.readLine();//read next line
           while (line != null) {
               // read next line
               String[] res = line.split(" ");//split the line according to spaces and store it in res
               details[i++] = new Details(res[0], res[1], res[2]);//create a details object with the individual strings as parameters
               line = reader.readLine();//read next line
       }
           reader.close();
       }
     
       catch (IOException e)
       {
           e.printStackTrace();
       }
     
       System.out.println("FirstName LastName ZIP");
     
       for(int j=0;j<i;j++)//display the contents of objects
       {
           System.out.println(details[j].getFirstName() + "\t " + details[j].getLastName() + "\t " + details[j].getZip());
       }
   }
}

Answer 1

Please find the code below.

We just have to modify Line number 37 at split(" ") to split("\\s+) . It is a regex and it tells that More than one space will be used as a split condition.

SOURCE CODE:

*Please follow the comments to better understand the code.

**Please look at the Screenshot below and use this code to copy-paste.

***The code in the below screenshot is neatly indented for better understanding.

import java.io.*;
class Details//stores the firstname, lastname and zip
{
    String firstname, lastname, zip;
    public Details(String a, String b, String c)//constructor
    {
        firstname = a;lastname = b;zip = c;
    }
    public String getFirstName()//getter methods
    {
        return firstname;
    }
    public String getLastName()
    {
        return lastname;
    }
    public String getZip()
    {
        return zip;
    }
}
public class A {

    public static void main(String[] args)

    {
        Details details[] = new Details[25];int i=0;

        BufferedReader reader;

        try
        {
            reader = new BufferedReader(new FileReader("myfile.txt"));//reader object for file
            String line = reader.readLine();//read next line
            while (line != null) {
                // read next line
                String[] res = line.split("\\s+");//split the line according to one or more \\s+ regexspaces and store it in res
                
                details[i++] = new Details(res[0], res[1], res[2]);//create a details object with the individual strings as parameters
                line = reader.readLine();//read next line
            }
            reader.close();
        }

        catch (IOException e)
        {
            e.printStackTrace();
        }

        System.out.println("FirstName LastName ZIP");

        for(int j=0;j<i;j++)//display the contents of objects
        {
            System.out.println(details[j].getFirstName() + "\t " + details[j].getLastName() + "\t " + details[j].getZip());
        }
    }
}

============

SAMPLE OUTPUT:

File

OUTPUT: