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Before we start, did you try solving the workbook yourself?

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If not, please click the link in the resources folder and follow the instructions for this workbook.

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It is bad practice to be able to directly access each field.

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What we need to do is make every single field private to the class that it was defined in.

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That way, nobody outside of the class can have direct access to these fields.

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They are not visible.

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The only place where they can be accessed is this class.

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And so what we need to do is in task to add getters that return copies of each field value.

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So the first getter.

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Old get name.

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It will return a string copy of the name field.

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The second getter.

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Will return a string copy of the nationality field.

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So here we can return nationality.

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The third getter will return a string called Get Date of Birth, and it will be used to get the date

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of birth.

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It's going to return the string value stored inside of the date of birth field.

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And finally, we say public.

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Integer.

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Get seat number.

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And what that will do is return the integer value stored inside of the seat number field.

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Return.

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Seat number.

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All right.

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Call the gutters from your print line function and rerun the code so we cannot access the fields directly,

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but we can call the getters which return a copy of each field value.

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Person get name.

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Person.

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Nationality.

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Person dot.

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Get date of birth.

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Person dot.

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Get seat number.

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All right.

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We can go ahead and run our code in debug mode.

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Here we create a new object of the person class, and the constructor is going to initialize every single

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field in that object.

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The person variable stores a reference that points to the object we just created.

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Here, if I step inside.

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It's going to go inside of the string builder.

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We don't care about that.

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But if I press, step inside again, it's going to go inside of get name.

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This points to the current object that's calling get name.

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The current object has a field value of Rand Slim, which we are returning.

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The get name getter returns ran Slim over here.

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What I'll do actually is I will put breakpoints here so that we can just press continue.

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So the next getter that we're calling is get nationality.

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This points to the current object that's calling this gutter.

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The current object has a nationality of Canadian, which we are returning.

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All right.

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The next method that we're calling is get date of birth.

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The current object that's calling get date of birth has the following field value, which we are returning.

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All right.

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The fourth getter that's being called from the current object is get seat number.

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And the current object has a seat number of five, which we are then returning.

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And now if I press continue, the runtime will end and it ends up printing every single field value

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in our object.

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All right.

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Task four is to add setters for name, nationality, date of birth, and seat number.

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The reason we do that is because we cannot directly access any of the field and then update their values.

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We need to update our field values through setters.

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So we're going to have one setter that's going to set the name.

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It will receive a string parameter name and using the parameter that gets passed in.

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It's going to set the name field of the current object equal to the name parameter.

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We're going to have another setter.

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This one will be called set Nationality.

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And here what we do is we set the nationality of the current object that's calling this method equal

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to the nationality that gets passed in.

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We create another setter.

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That receives a date of birth.

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So we'll call it set Date of birth.

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It will receive a date of birth parameter.

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And what it's going to do is set the date of birth of the current object that's calling this method

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equal to the date of birth that gets passed in.

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And we'll have one more getter.

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This one will be called set seat number.

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It will receive a seat number parameter.

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And what it will do is set the seat number of the current object that's calling this method equal to

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the seat number that gets passed in.

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All right.

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The task number five is the person's current seat number, unfortunately, is taken.

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So what we need to do is update their seat number to ten before printing the fields.

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So here we can say person, we're going to update that object seat number, set, seat number equal

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to ten.

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So now what I'm going to do is visualize the runtime.

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All right.

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So here we're creating a new object of the person class, and we're using our constructor to initialize

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all of the objects fields.

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So here we have our person variable, which stores a reference to that object.

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And now we're going to call a set seat number for that same object.

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This points to the current object that's calling this method, and we're setting the seat number of

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the current object equal to the seat number that was passed in ten.

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All right, Now that we've updated our object to seat number to ten, we can print all of its fields.

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So if I press continue, it will continue to the first breakpoint.

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Get name here we're calling person, get name this point to the current object that's calling this method

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and we're returning a copy of the field value name.

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The next method that we're calling from our person object is get nationality.

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Once again, this point to the current object that's calling this getter.

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Here we're just returning the field value Canadian.

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We're also calling the gutter a date of birth.

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And in this case, we're going to return the following field value.

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And here we're going to return the seat number that we just recently updated.

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So here is our object.

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And here you can see the field values that we printed.

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All right.

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I hope you enjoyed this breakpoint session.