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Constructors.

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The constructors are special methods with special declarations.

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So constructor declarations don't state a return type and their name matches the class name.

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So for example, here, let's create an constructor of this class, my date and time to my my date and

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time.

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And this is our constructor and assign it here.

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Here.

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2019.

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Here and let's.

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Delete of your code.

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Here my data and my data and time clock.

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Here.

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And print this clock here.

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So as you remember, we didn't we won't assign anything on clock and you will see what happens then.

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So let's print the our clock here, as you can see here.

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So.

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Time is here and the or no time.

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This is a year.

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Year is.

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Here and then we will pass clock dot get here method.

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So.

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Here.

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So the new constructor here, as you can see here, the new constructor.

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Yeah, the new constructor here takes a single year, takes a single year as a parameter.

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So actually, let me write the parameter here.

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Integer year in and we will assign this year in or if set year.

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Is here in.

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Then here equals to 2019.

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So.

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And as you can see, we need to machine constructor initialization.

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So we need to add something add year variable in it because the constructors need a parameter here.

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So.

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For example, 2020.

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Here and we can as you can see, we don't have any errors in the code.

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So here takes a single year in argument of type integer here.

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So you call the set year.

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Here set here with here in.

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So if set here returns false the color provided by input and you override here in with a default value

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of 2019.

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So in main here you make a clock within a new constructor and then print the result.

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So the conjugation of the my date and time clock here, 2000 2020 is called an initialization.

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Here.

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So you might not like the idea that invalid here that in instances where slight silently corrected to

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2019, I don't like it either.

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So exceptions solve this problem so you will learn about them in next lectures about exceptions here.