Just have a few questions involving them in code.

would help if you posted your questions and any code snippets you're confused about.

But that's too logical.

I wasn't sure if anyone was on. I usually talk on messenger.

I was concerned about setting the boolean value of a string from false to true.

What methods are most efficient?

I am making a library with books/cds/games on loan and was seeking to change statuses like "onLoan" from F to T

not sure what you're talking about when you say "boolean value of a string". do you mean you're using some kind of Map<String, Boolean>? or you have an object with a boolean onLoan instance variable (and getter/setter)?

myarraylist.get(0).setOnLoan(true);

This post was edited by carteblanche on Mar 8 2015 07:30pm

Yeah, the getter/setter.

I need to have a constructor to set the value, but I also need to have the program start without the value being false.

Seems like a logical concept, but kind of kicking at rocks figuring it out.

This post was edited by axid3nt on Mar 8 2015 07:33pm

you mean starts neither false nor true? look into alternatives to boolean, eg use a flag (int, string, enum, etc). alternatively you can use Boolean wrapper class, but i'm not a fan of that as a means to use 3 states.

or if you mean start it as true, then make that your default value.

This post was edited by carteblanche on Mar 8 2015 07:59pm

Alright, I will keep trying different things until I am satisfied. Thanks for the suggestion.

Default the value to true for your object when you're reading them in from a file or manually entering them. Then set the value to false whenever one is checked out in your checkout() function or whatever.

First you'll have to find the object in your ArrayList when it's checked out, change it from true to false.

In your obj class you can have a function called

public void isCheckedout(){
setCheckout(false);
}

That way you're not accessing the mutator (set) method directly in your main class but you have access to a public isCheckout function so you'd just do Arraylist>object.isCheckedOut(); or something similar to that.