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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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The purpose of this workbook is to define a function inside of the person class that every object is

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able to use.

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The function will be called Apply PLI passport.

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It will return a boolean and does not expect any parameters.

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So here we can say public boolean.

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It will return a boolean.

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Apply a passport and it does not expect any parameters.

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This code randomly returns zero or one.

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Simple enough.

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We covered math random very extensively in the functions section.

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And what we need to do is use this code to return true if the number equals one and false.

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Otherwise, it tells us not to use if else, to accomplish this task because we can just say return

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the number equals one.

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So if this is true, true will be returned.

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If this is false, false will be returned.

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There is no need to say if this is true, then return true.

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That would just be very redundant.

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Otherwise return false.

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This looks really tedious.

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We're already returning the result of a comparison, so we are good.

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Task two is inside the person class to find a function called to seat.

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It's void does not expect any parameters and it must use the following code to update the person's seat

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with a random seat number.

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So here we can say public void to seat.

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This function will allow any object that calls it to choose a random seat.

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Choosing a random seat will be based on the following code.

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So here we can say this.

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Not seat number.

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Actually, there is no need to use the this keyword because there is no conflicting parameter.

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By saying seat number, it's automatically going to reference the field of whatever object is calling

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this method.

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And we can set that equal to a random seat number between one and 11.

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So a range goes from 1 to 11.

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If you're wondering why that is, I highly recommend revisiting the function section.

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Now your starter project should contain one object.

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Let us confirm this.

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Indeed, it does call apply passport from your object and if the function returns true, we print the

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following.

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Otherwise we print this.

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So here we'll say.

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If a person does not apply passport, if the result of them applying for a passport returns true, then

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we're going to print the following message.

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Congratulations.

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Whatever the person's name is, your passport was approved.

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Otherwise, if applying for a passport ends up returning false, then we print this message.

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Sorry, we cannot process your application.

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And it seems like, according to the output, we print their fields first, then we give them the result

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of their application.

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So what we're going to do is put this after.

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And I think we're good.

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Let us visualize the runtime.

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As always.

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One breakpoint here.

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Only need one here, and then we can just keep stepping over.

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Okay.

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So here we're creating a new object of the person class, and we're calling the constructor that expects

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to receive four values.

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The constructor is going to receive every single value that we pass in as a parameter, such that this

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points to the current object that we just created.

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Here.

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We set this name equal to the name parameter.

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Here we set this nationality equal to the nationality parameter.

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We set the objects as date of birth equal to the date of birth parameter.

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And we set the object to seat number equal to the seat number that we passed in.

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All right, now the constructor is finished updating the object as Field's person variable is going

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to store a reference to that object.

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And here we print that object as field values minus the passport because it's null.

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And here that same person, that same object is going to call a PLI passport.

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So this points to the current object that's calling a PLI passport, the same object with a reference

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of at 14.

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And this is just going to generate a random integer that is either zero or one.

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In this case, it generates a number of zero.

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Zero does not equal one.

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So there are passport application is false.

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Which means else is going to get triggered.

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We are sorry.

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We cannot process your application.

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Okay, let's now try this again and hope that the next time it ends up being true.

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So this is just going to create a new object of the person class printing every single field value.

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We are applying for a passport again.

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Hopefully it's true.

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It is true.

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One equals one.

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Their passport application is going to get processed.

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Congratulations person.

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Get name.

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Your passport was approved.

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All right.

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And that is all we were able to achieve both outputs.

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This would look a little bit cleaner if you just run the code using terminal commands.

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So a Java C main, Java, Java main.

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And now you can run the code to your heart's content and you're going to get alternating results.