CharAt(0) out of bounds exception when I have too much white space

-3

Currently stuck on an assignment that requires me to print out the users name as such: Last,First Initial.
(Bob, Billy H.) If I add too many spaces between the first and middle name when inputting, I get an index out of bounds exception. (String out of bounds 0) The program runs completely fine unless I have more than one space between the first and middle name.

I can only use the trim, indexOf, substring,and charAt methods in this program.

import java.util.Scanner;



public class Name {



public static void main(String args) {



    Scanner s = new Scanner(System.in);



    System.out.println("Enter your name in this format: <spaces>First name<spaces>Middle name<spaces>Last name<spaces>");



    String name = s.nextLine();



    name = name.trim();



    String first, middle, last;



    int firstSpace = name.indexOf(' ');



    first = name.substring(0, firstSpace);



    int secondSpace = name.indexOf(" ", (firstSpace + 1));



    middle = name.substring((firstSpace + 1), secondSpace);



    middle.trim();



    last = name.substring(secondSpace+1);



    char middleInitial = middle.charAt(0);

    String initial = "";

    initial = initial + middleInitial;



    for(int i = 1; i < middle.length(); i++) {

        char currentLetter = middle.charAt(i);

        char lastLetter = middle.charAt(i - 1);



        if(lastLetter == ' ') {

            initial = initial + "." + currentLetter;

        }

    }



    System.out.println(last + "," + first + ' ' + initial + ".");



}



}

edited Nov 22 '18 at 13:07

E_net4

12.3k63569

asked Nov 22 '18 at 4:14

Calculation

1

on which line does it fail?

– Lenin Raj Rajasekaran
Nov 22 '18 at 4:15

1

Did you try debugging for the problem?

– Busy Bee
Nov 22 '18 at 4:17

when you have multiple spaces there, your secondSpace is before the middle name, and not after as you would expect

– Kartik
Nov 22 '18 at 4:23

and you are ignoring the result of middle.trim();.. change it to middle = middle.trim();

– Kartik
Nov 22 '18 at 4:23

1

Look at middle = name.substring((firstSpace + 1), secondSpace);. middle will be empty if secondSpace == fristSpace + 1

– Ricky Mo
Nov 22 '18 at 4:24

|
show 2 more comments

-3

I can only use the trim, indexOf, substring,and charAt methods in this program.

import java.util.Scanner;



public class Name {



public static void main(String args) {



    Scanner s = new Scanner(System.in);



    System.out.println("Enter your name in this format: <spaces>First name<spaces>Middle name<spaces>Last name<spaces>");



    String name = s.nextLine();



    name = name.trim();



    String first, middle, last;



    int firstSpace = name.indexOf(' ');



    first = name.substring(0, firstSpace);



    int secondSpace = name.indexOf(" ", (firstSpace + 1));



    middle = name.substring((firstSpace + 1), secondSpace);



    middle.trim();



    last = name.substring(secondSpace+1);



    char middleInitial = middle.charAt(0);

    String initial = "";

    initial = initial + middleInitial;



    for(int i = 1; i < middle.length(); i++) {

        char currentLetter = middle.charAt(i);

        char lastLetter = middle.charAt(i - 1);



        if(lastLetter == ' ') {

            initial = initial + "." + currentLetter;

        }

    }



    System.out.println(last + "," + first + ' ' + initial + ".");



}



}

edited Nov 22 '18 at 13:07

E_net4

12.3k63569

asked Nov 22 '18 at 4:14

Calculation

1

on which line does it fail?

– Lenin Raj Rajasekaran
Nov 22 '18 at 4:15

1

Did you try debugging for the problem?

– Busy Bee
Nov 22 '18 at 4:17

when you have multiple spaces there, your secondSpace is before the middle name, and not after as you would expect

– Kartik
Nov 22 '18 at 4:23

and you are ignoring the result of middle.trim();.. change it to middle = middle.trim();

– Kartik
Nov 22 '18 at 4:23

1

Look at middle = name.substring((firstSpace + 1), secondSpace);. middle will be empty if secondSpace == fristSpace + 1

– Ricky Mo
Nov 22 '18 at 4:24

|
show 2 more comments

-3

I can only use the trim, indexOf, substring,and charAt methods in this program.

import java.util.Scanner;



public class Name {



public static void main(String args) {



    Scanner s = new Scanner(System.in);



    System.out.println("Enter your name in this format: <spaces>First name<spaces>Middle name<spaces>Last name<spaces>");



    String name = s.nextLine();



    name = name.trim();



    String first, middle, last;



    int firstSpace = name.indexOf(' ');



    first = name.substring(0, firstSpace);



    int secondSpace = name.indexOf(" ", (firstSpace + 1));



    middle = name.substring((firstSpace + 1), secondSpace);



    middle.trim();



    last = name.substring(secondSpace+1);



    char middleInitial = middle.charAt(0);

    String initial = "";

    initial = initial + middleInitial;



    for(int i = 1; i < middle.length(); i++) {

        char currentLetter = middle.charAt(i);

        char lastLetter = middle.charAt(i - 1);



        if(lastLetter == ' ') {

            initial = initial + "." + currentLetter;

        }

    }



    System.out.println(last + "," + first + ' ' + initial + ".");



}



}

edited Nov 22 '18 at 13:07

E_net4

12.3k63569

asked Nov 22 '18 at 4:14

Calculation

I can only use the trim, indexOf, substring,and charAt methods in this program.

import java.util.Scanner;



public class Name {



public static void main(String args) {



    Scanner s = new Scanner(System.in);



    System.out.println("Enter your name in this format: <spaces>First name<spaces>Middle name<spaces>Last name<spaces>");



    String name = s.nextLine();



    name = name.trim();



    String first, middle, last;



    int firstSpace = name.indexOf(' ');



    first = name.substring(0, firstSpace);



    int secondSpace = name.indexOf(" ", (firstSpace + 1));



    middle = name.substring((firstSpace + 1), secondSpace);



    middle.trim();



    last = name.substring(secondSpace+1);



    char middleInitial = middle.charAt(0);

    String initial = "";

    initial = initial + middleInitial;



    for(int i = 1; i < middle.length(); i++) {

        char currentLetter = middle.charAt(i);

        char lastLetter = middle.charAt(i - 1);



        if(lastLetter == ' ') {

            initial = initial + "." + currentLetter;

        }

    }



    System.out.println(last + "," + first + ' ' + initial + ".");



}



}

java

edited Nov 22 '18 at 13:07

E_net4

12.3k63569

asked Nov 22 '18 at 4:14

Calculation

edited Nov 22 '18 at 13:07

E_net4

12.3k63569

asked Nov 22 '18 at 4:14

Calculation

edited Nov 22 '18 at 13:07

E_net4

12.3k63569

edited Nov 22 '18 at 13:07

E_net4

12.3k63569

edited Nov 22 '18 at 13:07

E_net4

12.3k63569

asked Nov 22 '18 at 4:14

Calculation

asked Nov 22 '18 at 4:14

Calculation

asked Nov 22 '18 at 4:14

Calculation

1

on which line does it fail?

– Lenin Raj Rajasekaran
Nov 22 '18 at 4:15

1

Did you try debugging for the problem?

– Busy Bee
Nov 22 '18 at 4:17

when you have multiple spaces there, your secondSpace is before the middle name, and not after as you would expect

– Kartik
Nov 22 '18 at 4:23

and you are ignoring the result of middle.trim();.. change it to middle = middle.trim();

– Kartik
Nov 22 '18 at 4:23

1

Look at middle = name.substring((firstSpace + 1), secondSpace);. middle will be empty if secondSpace == fristSpace + 1

– Ricky Mo
Nov 22 '18 at 4:24

|
show 2 more comments

1

on which line does it fail?

– Lenin Raj Rajasekaran
Nov 22 '18 at 4:15

1

Did you try debugging for the problem?

– Busy Bee
Nov 22 '18 at 4:17

when you have multiple spaces there, your secondSpace is before the middle name, and not after as you would expect

– Kartik
Nov 22 '18 at 4:23

and you are ignoring the result of middle.trim();.. change it to middle = middle.trim();

– Kartik
Nov 22 '18 at 4:23

1

Look at middle = name.substring((firstSpace + 1), secondSpace);. middle will be empty if secondSpace == fristSpace + 1

– Ricky Mo
Nov 22 '18 at 4:24

on which line does it fail?

– Lenin Raj Rajasekaran
Nov 22 '18 at 4:15

Did you try debugging for the problem?

– Busy Bee
Nov 22 '18 at 4:17

when you have multiple spaces there, your secondSpace is before the middle name, and not after as you would expect

– Kartik
Nov 22 '18 at 4:23

and you are ignoring the result of middle.trim();.. change it to middle = middle.trim();

– Kartik
Nov 22 '18 at 4:23

Look at middle = name.substring((firstSpace + 1), secondSpace);. middle will be empty if secondSpace == fristSpace + 1

– Ricky Mo
Nov 22 '18 at 4:24

|
show 2 more comments

1 Answer
1

active

oldest

votes

The reason for error is for input

   amid     skum    asdf

for above input:

int firstSpace = name.indexOf(' '); //firstSpace = 0

int secondSpace = name.indexOf(" ", (firstSpace + 1));//secondSpace = 1

 middle = name.substring((firstSpace + 1), secondSpace); // as the two or more continues space inputted, this will select empty string as firstSpace + 1 == secondSpace and later causing the exception

Do name = name.replaceAll(" +", " "); to replace all two or more white spaces.
As karthik suggested in comments, perform assignment middle = middle.trim();.

EDIT:
Since you can not use replaceAll, Modified the code just by using trim method. Have a closer look at the below snippets:

 String middleNameLastName = name.substring(firstSpace+1).trim();

 last = middleNameLastName.substring(index+1).trim();

These removes trailing spaces.

import java.util.Scanner;



public class Post1 {



    public static void main(String args) {

        Scanner s = new Scanner(System.in);



        System.out.println("Enter your name in this format: <spaces>First name<spaces>Middle name<spaces>Last name<spaces>");



        String name = s.nextLine();



        name = name.trim();

        String first, middle, last;

        int firstSpace = name.indexOf(' ');

        first = name.substring(0, firstSpace);

        String middleNameLastName = name.substring(firstSpace+1).trim();

        int index = middleNameLastName.indexOf(" ");

        middle = middleNameLastName.substring(0, index);

        last = middleNameLastName.substring(index+1).trim();



        System.out.println(last + "," + first + ' ' + middle.charAt(0) + ".");

        s.close();

    }



}

edited Nov 24 '18 at 15:08

answered Nov 22 '18 at 4:42

secret super star

1,025115

Thanks for the suggestion. I would have used replaceAll if I was able to, but the assignment only allows me to use the four string methods that I stated above, and replaceAll is unfortunately not one of them.

– Calculation
Nov 22 '18 at 5:34

I see. Missed that.

– secret super star
Nov 22 '18 at 6:08

Do you have any idea on how to solve this problem without using replaceAll, I've tried everything and cannot solve this problem.

– Calculation
Nov 23 '18 at 23:51

@Calculation Edited answer as per your comments

– secret super star
Nov 24 '18 at 15:08

add a comment |

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1 Answer
1

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1 Answer
1

active

oldest

votes

The reason for error is for input

   amid     skum    asdf

for above input:

int firstSpace = name.indexOf(' '); //firstSpace = 0

int secondSpace = name.indexOf(" ", (firstSpace + 1));//secondSpace = 1

 middle = name.substring((firstSpace + 1), secondSpace); // as the two or more continues space inputted, this will select empty string as firstSpace + 1 == secondSpace and later causing the exception

Do name = name.replaceAll(" +", " "); to replace all two or more white spaces.
As karthik suggested in comments, perform assignment middle = middle.trim();.

EDIT:
Since you can not use replaceAll, Modified the code just by using trim method. Have a closer look at the below snippets:

 String middleNameLastName = name.substring(firstSpace+1).trim();

 last = middleNameLastName.substring(index+1).trim();

These removes trailing spaces.

import java.util.Scanner;



public class Post1 {



    public static void main(String args) {

        Scanner s = new Scanner(System.in);



        System.out.println("Enter your name in this format: <spaces>First name<spaces>Middle name<spaces>Last name<spaces>");



        String name = s.nextLine();



        name = name.trim();

        String first, middle, last;

        int firstSpace = name.indexOf(' ');

        first = name.substring(0, firstSpace);

        String middleNameLastName = name.substring(firstSpace+1).trim();

        int index = middleNameLastName.indexOf(" ");

        middle = middleNameLastName.substring(0, index);

        last = middleNameLastName.substring(index+1).trim();



        System.out.println(last + "," + first + ' ' + middle.charAt(0) + ".");

        s.close();

    }



}

edited Nov 24 '18 at 15:08

answered Nov 22 '18 at 4:42

secret super star

1,025115

Thanks for the suggestion. I would have used replaceAll if I was able to, but the assignment only allows me to use the four string methods that I stated above, and replaceAll is unfortunately not one of them.

– Calculation
Nov 22 '18 at 5:34

I see. Missed that.

– secret super star
Nov 22 '18 at 6:08

Do you have any idea on how to solve this problem without using replaceAll, I've tried everything and cannot solve this problem.

– Calculation
Nov 23 '18 at 23:51

@Calculation Edited answer as per your comments

– secret super star
Nov 24 '18 at 15:08

add a comment |

The reason for error is for input

   amid     skum    asdf

for above input:

int firstSpace = name.indexOf(' '); //firstSpace = 0

int secondSpace = name.indexOf(" ", (firstSpace + 1));//secondSpace = 1

 middle = name.substring((firstSpace + 1), secondSpace); // as the two or more continues space inputted, this will select empty string as firstSpace + 1 == secondSpace and later causing the exception

Do name = name.replaceAll(" +", " "); to replace all two or more white spaces.
As karthik suggested in comments, perform assignment middle = middle.trim();.

EDIT:
Since you can not use replaceAll, Modified the code just by using trim method. Have a closer look at the below snippets:

 String middleNameLastName = name.substring(firstSpace+1).trim();

 last = middleNameLastName.substring(index+1).trim();

These removes trailing spaces.

import java.util.Scanner;



public class Post1 {



    public static void main(String args) {

        Scanner s = new Scanner(System.in);



        System.out.println("Enter your name in this format: <spaces>First name<spaces>Middle name<spaces>Last name<spaces>");



        String name = s.nextLine();



        name = name.trim();

        String first, middle, last;

        int firstSpace = name.indexOf(' ');

        first = name.substring(0, firstSpace);

        String middleNameLastName = name.substring(firstSpace+1).trim();

        int index = middleNameLastName.indexOf(" ");

        middle = middleNameLastName.substring(0, index);

        last = middleNameLastName.substring(index+1).trim();



        System.out.println(last + "," + first + ' ' + middle.charAt(0) + ".");

        s.close();

    }



}

edited Nov 24 '18 at 15:08

answered Nov 22 '18 at 4:42

secret super star

1,025115

Thanks for the suggestion. I would have used replaceAll if I was able to, but the assignment only allows me to use the four string methods that I stated above, and replaceAll is unfortunately not one of them.

– Calculation
Nov 22 '18 at 5:34

I see. Missed that.

– secret super star
Nov 22 '18 at 6:08

Do you have any idea on how to solve this problem without using replaceAll, I've tried everything and cannot solve this problem.

– Calculation
Nov 23 '18 at 23:51

@Calculation Edited answer as per your comments

– secret super star
Nov 24 '18 at 15:08

add a comment |

The reason for error is for input

   amid     skum    asdf

for above input:

int firstSpace = name.indexOf(' '); //firstSpace = 0

int secondSpace = name.indexOf(" ", (firstSpace + 1));//secondSpace = 1

 middle = name.substring((firstSpace + 1), secondSpace); // as the two or more continues space inputted, this will select empty string as firstSpace + 1 == secondSpace and later causing the exception

Do name = name.replaceAll(" +", " "); to replace all two or more white spaces.
As karthik suggested in comments, perform assignment middle = middle.trim();.

EDIT:
Since you can not use replaceAll, Modified the code just by using trim method. Have a closer look at the below snippets:

 String middleNameLastName = name.substring(firstSpace+1).trim();

 last = middleNameLastName.substring(index+1).trim();

These removes trailing spaces.

import java.util.Scanner;



public class Post1 {



    public static void main(String args) {

        Scanner s = new Scanner(System.in);



        System.out.println("Enter your name in this format: <spaces>First name<spaces>Middle name<spaces>Last name<spaces>");



        String name = s.nextLine();



        name = name.trim();

        String first, middle, last;

        int firstSpace = name.indexOf(' ');

        first = name.substring(0, firstSpace);

        String middleNameLastName = name.substring(firstSpace+1).trim();

        int index = middleNameLastName.indexOf(" ");

        middle = middleNameLastName.substring(0, index);

        last = middleNameLastName.substring(index+1).trim();



        System.out.println(last + "," + first + ' ' + middle.charAt(0) + ".");

        s.close();

    }



}

edited Nov 24 '18 at 15:08

answered Nov 22 '18 at 4:42

secret super star

1,025115

The reason for error is for input

   amid     skum    asdf

for above input:

int firstSpace = name.indexOf(' '); //firstSpace = 0

int secondSpace = name.indexOf(" ", (firstSpace + 1));//secondSpace = 1

 middle = name.substring((firstSpace + 1), secondSpace); // as the two or more continues space inputted, this will select empty string as firstSpace + 1 == secondSpace and later causing the exception

Do name = name.replaceAll(" +", " "); to replace all two or more white spaces.
As karthik suggested in comments, perform assignment middle = middle.trim();.

EDIT:
Since you can not use replaceAll, Modified the code just by using trim method. Have a closer look at the below snippets:

 String middleNameLastName = name.substring(firstSpace+1).trim();

 last = middleNameLastName.substring(index+1).trim();

These removes trailing spaces.

import java.util.Scanner;



public class Post1 {



    public static void main(String args) {

        Scanner s = new Scanner(System.in);



        System.out.println("Enter your name in this format: <spaces>First name<spaces>Middle name<spaces>Last name<spaces>");



        String name = s.nextLine();



        name = name.trim();

        String first, middle, last;

        int firstSpace = name.indexOf(' ');

        first = name.substring(0, firstSpace);

        String middleNameLastName = name.substring(firstSpace+1).trim();

        int index = middleNameLastName.indexOf(" ");

        middle = middleNameLastName.substring(0, index);

        last = middleNameLastName.substring(index+1).trim();



        System.out.println(last + "," + first + ' ' + middle.charAt(0) + ".");

        s.close();

    }



}

edited Nov 24 '18 at 15:08

answered Nov 22 '18 at 4:42

secret super star

1,025115

edited Nov 24 '18 at 15:08

answered Nov 22 '18 at 4:42

secret super star

1,025115

answered Nov 22 '18 at 4:42

secret super star

1,025115

answered Nov 22 '18 at 4:42

secret super star

1,025115

Thanks for the suggestion. I would have used replaceAll if I was able to, but the assignment only allows me to use the four string methods that I stated above, and replaceAll is unfortunately not one of them.

– Calculation
Nov 22 '18 at 5:34

I see. Missed that.

– secret super star
Nov 22 '18 at 6:08

Do you have any idea on how to solve this problem without using replaceAll, I've tried everything and cannot solve this problem.

– Calculation
Nov 23 '18 at 23:51

@Calculation Edited answer as per your comments

– secret super star
Nov 24 '18 at 15:08

add a comment |

Thanks for the suggestion. I would have used replaceAll if I was able to, but the assignment only allows me to use the four string methods that I stated above, and replaceAll is unfortunately not one of them.

– Calculation
Nov 22 '18 at 5:34

I see. Missed that.

– secret super star
Nov 22 '18 at 6:08

Do you have any idea on how to solve this problem without using replaceAll, I've tried everything and cannot solve this problem.

– Calculation
Nov 23 '18 at 23:51

@Calculation Edited answer as per your comments

– secret super star
Nov 24 '18 at 15:08

Thanks for the suggestion. I would have used replaceAll if I was able to, but the assignment only allows me to use the four string methods that I stated above, and replaceAll is unfortunately not one of them.

– Calculation
Nov 22 '18 at 5:34

I see. Missed that.

– secret super star
Nov 22 '18 at 6:08

Do you have any idea on how to solve this problem without using replaceAll, I've tried everything and cannot solve this problem.

– Calculation
Nov 23 '18 at 23:51

@Calculation Edited answer as per your comments

– secret super star
Nov 24 '18 at 15:08

add a comment |

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