count a certain letter in a type statement.

[jcsencsits]

I am trying to get this to print the number of J's there are in the
users input. and then ask if they want to try again. can someone help
me ecause it doesn't count all lettr J's


import java.util.Scanner;

class countletter
{
public static void main(String[] args) {
int numOfJ = 0;
int control = 1;
int i = 0;
String randomString = " ";
char charLetter;

do {
numOfJ = 0; //j,J

Scanner scan = new Scanner(System.in);
System.out.print("Enter a string: ");
randomString = scan.next();

for (int letter = 0; letter < randomString.length(); letter++) {
charLetter = randomString.charAt(letter);

if (charLetter == 'j' || charLetter == 'J') {
numOfJ++;
} }


System.out.println("\nNo. of 'J' / 'j' = " + numOfJ);

System.out.println(
"If you would like to run the program for another string
please enter 1.");
control = scan.nextInt();
}
while (control == 1);

}
}

 

[Oliver Wong]

I am trying to get this to print the number of J's there are in the
users input. and then ask if they want to try again. can someone help
me ecause it doesn't count all lettr J's

[code snipped]

It works when I test it.

- Oliver

 

[jcsencsits]

Enter a string: jason is jack

No. of 'J' / 'j' = 1
If you would like to run the program for another string please enter 1.
Exception in thread "main" java.util.InputMismatchException
at java.util.Scanner.throwFor(Scanner.java:840)
at java.util.Scanner.next(Scanner.java:1461)
at java.util.Scanner.nextInt(Scanner.java:2091)
at java.util.Scanner.nextInt(Scanner.java:2050)
at countletter.main(Project5B.java:36)

----jGRASP wedge2: exit code for process is 1.
----jGRASP: operation complete.

users input. and then ask if they want to try again. can someone help
me ecause it doesn't count all lettr J's[code snipped]

It works when I test it.

- Oliver

 

[Gordon Beaton]

Enter a string: jason is jack

No. of 'J' / 'j' = 1

You need to read the documentation for Scanner.next().

Doing so might also help you understand why you get the
following exception:

Exception in thread "main" java.util.InputMismatchException

/gordon

 

[jcsencsits]

it works for one word but when i do a sentence is when it fails

 

[Gordon Beaton]

it works for one word but when i do a sentence is when it fails

That was clear from your earlier example. Scanner.next() does not
return the entire line entered by the user, as you seem to expect. Did
you read its documentation as I suggested?

Try displaying the contents of the randomString along with the
corresponding J count.

/gordon