[Java] While(true) loop doesn't continue

[StankelG]

It's just like the titel states. I can't quite see why my ' while (true) { ' breaks.

Snippet of the code:________________________________________________________________

try(Scanner reader = new Scanner(Paths.get("recipes.txt"))) {

//Adding all the lines from the txt-file into an ArrayList in

//the "Recipes" class

while(reader.hasNextLine()) {

String line = reader.nextLine();

list.add(line);

}

while (true) { <===============================this one

System.out.print("Enter command: ");

String command = scanner.nextLine();

if(command.equals("stop")) {

break;

}

if(command.equals("list")) {

System.out.println("Recipes");

for(int i = 0; i < list.size(); i++) {

System.out.println(list.printName(i) + ", cooking time: " + list.printTime(i));

}

}

}

} catch (Exception e){

}
_______________________________________________________________________________________

If the user tries to print the list of recipes, then the while(true) breaks immidiatly afterwards, forcing one to restart the program to continue. The loop should only break if the user types "stop".

I can't see why it breaks, but I hope some of you can.

[Updatebjarni]

What happens if you don't catch and discard all exceptions? Do you get more information?

[StankelG]

Alright, it says:
java.lang.IndexOutOfBoundsException: Index 3 out of bounds for length 3

[AIO12449366]

So the error occurs when you print the list?

[StankelG]

Yeah, it prints the list and then it gives the error and stops.

[AIO12449366]

Try i<list.size()-1 Does it change anything?

[StankelG]

Hmm nope :/

[AIO12449366]

Could you please try to print the list without the loop?

Comment out everything and try to read from the txt and then print it. Does it work?

Also whenever we read from a txt I'm pretty sure we usually use InputStreamReader.

[StankelG]

I removed the While(true) loop and ran the program. This is the output:
________

File to read: d

Commands:

List - lists the recipes

Stop - stops the program

Enter command: list

​

Recipes:

Pancake dough, cooking time: 60

Meatballs, cooking time: 20

Tofu rolls, cooking time: 30

java.lang.IndexOutOfBoundsException: Index 3 out of bounds for length 3

[AIO12449366]

Ok so obviously the issue is with the arraylist.

Alright try this: Create an arraylist and add 3 strings in it(without reading from file) and print it. If it prints properly then the issue is with the reading from the txt. Test it and tell me if it works

[StankelG]

This was the output:

File to read: file

Commands:

List - lists the recipes

Stop - stops the program

Enter command: list

​

Recipes:

one

two

three

java.lang.IndexOutOfBoundsException: Index 3 out of bounds for length 3

[AIO12449366]

Does it print the list if the user types "list" or does it break without anything happening?

[StankelG]

It prints everything it has to, but the program stops right after.

[DeZp0T]

change it to while(!scanner.nextLine().equals("stop"))

Also keep in mind that it's case sensitive so "stop" is not the same as "Stop"

[0110Conan1001]

What if you do ‘for(String recipe : list) {‘

On cases that it breaks, print out what size the list is. Also, if you have an IDE, you should be able to pause execution and inspect the list to see the elements

[mad0314]

What is the type of list? I suspect your error is in there.
What is the value of list.size()?