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In this lesson, you will add setters to the car class.

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Currently we have no way of updating an object as field because they were made to be private to the

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class that they were defined in.

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So that's why we need to add some public setters.

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So here we say public.

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Void.

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And a setter is always going to be called set followed by the field name.

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A Sutter does expect to receive a parameter whose type depends on the field itself.

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So this is going to receive a make value.

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And it's going to set the field.

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And the current object that's calling this setter, this dot make equal to the make value that gets

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passed in.

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So notice here we do need the this keyword to distinguish between the field and the parameter that gets

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passed in.

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Whereas in the getter there are no parameters.

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So make will automatically refer to the object as field.

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All right.

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So now we will add another setter that is available to the public.

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This one will be called set price.

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It's going to receive a double price, the same type as your price field.

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And when this setter gets called, it's going to set the price field of the current object equal to

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the price value that gets passed in.

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All right.

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Now we're going to need another setter, public void.

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This one will be called set year.

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And it's going to receive a year value.

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We can reference the current object that calls this method using the this keyword, and we can set its

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year field equal to the year value that gets passed in.

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Finally, we need one more setter.

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Here we'll say public void.

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This setter will be called set color and its responsibility will be to update the color field with whatever

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color value gets passed in.

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And the current object that calls this setter.

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We're going to set its color field equal to whatever color value gets passed in.

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And that should be all.

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And now, even though our fields are private, we have public gutters to return the fields as value

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and we have public setters to update them.

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So here what I'll do before printing the objects is Fields will update the color of this object.

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So here we'll say Nissan set color, and we're going to update its color to jet black.

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And we'll do the same thing for this object.

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We will say Dodge dot, set color, and we're going to give it a color of jet black as well.

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All right.

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And you know what?

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Let's just say the dealership is having a 50% off sale.

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What we'll do is we'll say Nissan DOT set price and we're going to set its price field equal to the

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current price.

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Divided by two.

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You can do the same thing here.

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Dodge Dot Set price.

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That's going to equal the current price of the Dodge Object divided by two.

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All right.

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I'm going to need break points in set color, set price and get price.

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I'll put four breakpoints here and we're good to go.

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So at this point we have two car objects.

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The first thing we'll do is from this object, we're going to call set color.

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So here this points to the current object that called this method.

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And here we're setting this color equal to the color value that was passed in jet black.

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All right.

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Now we're calling set color from this object, the object with a reference of 11.

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We can step inside.

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This points to the current object called this method.

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And here we're setting this color.

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Equal to the color value that was passed in jet black.

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All right.

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So at this point, we've updated both of our objects as color fields.

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And now here, Nissan is going to update its price field by first getting its current price.

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So get price is going to return the price field of the current object.

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So 10,000 divided by two means we're passing 5000 into set price.

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This points to the current object that's calling set price, and we're setting this price equal to 5000.

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All right.

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Going to the next breakpoint.

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Here.

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We're setting the price for this object by getting its current price divided by two.

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So first, we're going to go to get price.

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Get price is going to return the price value of the current object that's calling it 11,000.

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The value returned is 11,000.

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That divided by two is 5500.

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That's what's going to get passed into set price when an object with a reference of 11 calls it.

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This points to the current object that called set price.

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And here we're setting this price.

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The current object is price field equal to 5500.

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So at this point, we have fully updated both objects, the object with a reference of ten.

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The object with a reference of 11.

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And here we're just printing all of the fields.

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I don't want to step inside of get price again, so let me just remove all of my breakpoints.

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And we are done.

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So this recap is fairly simple.

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You should use setters to update your objects as fields.