1

00:00:00,480 --> 00:00:06,900

So because we declare this sport class as you can see here as an abstract class OK.



2

00:00:07,050 --> 00:00:10,740

Now you can see that the compiler doesn't show us any error.



3

00:00:10,740 --> 00:00:13,490

So now I want to actually implement the error is gone.



4

00:00:13,530 --> 00:00:14,150

OK.



5

00:00:14,160 --> 00:00:19,950

And this class this sport class actually implements this life insurance interface.



6

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OK.



7

00:00:20,580 --> 00:00:27,960

So here let's actually create some getters and setters for our instance variables here.



8

00:00:28,020 --> 00:00:28,370

OK.



9

00:00:28,390 --> 00:00:31,700

So so instead of this class just basically here.



10

00:00:31,800 --> 00:00:32,450

OK.



11

00:00:32,760 --> 00:00:38,520

And then actually can generate and then we can get here and setter and the list actually select all



12

00:00:38,520 --> 00:00:38,950

of these.



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00:00:38,950 --> 00:00:41,840

Instance variables and then click on OK.



14

00:00:42,270 --> 00:00:44,910

So now as you can see the ITD Android.



15

00:00:44,950 --> 00:00:47,470

So you are the ID actually it.



16

00:00:47,490 --> 00:00:50,830

These are good heroes and sitters are automatically for us.



17

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Kate gets Name City Name get rules set rules get uniform set uniform OK good speed required set speed



18

00:00:59,700 --> 00:01:03,790

requires gets power required and set the power required.



19

00:01:03,840 --> 00:01:07,280

OK so now I want to actually are.



20

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All right the twist thing is that these are sport class actually implicitly inherits from the Object



21

00:01:14,370 --> 00:01:14,640

class.



22

00:01:14,640 --> 00:01:20,280

Ok so here you can see I can just put in extends object.



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Here I am actually explicitly inheriting all of the features and behaviors that are inside of the Object



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00:01:27,000 --> 00:01:33,060

class and this class also implements this life insurance interface as you can see here.



25

00:01:33,060 --> 00:01:39,230

OK so now let's actually overwrite the two string Meffert that is inside of the Object class.



26

00:01:39,390 --> 00:01:41,380

Ok so I can just put it here.



27

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So here as you can see I pasted these lines of code here at St..



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Right public.



29

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Strange too strange.



30

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OK.



31

00:01:49,380 --> 00:01:52,410

And this move is actually as good as you can't see returns a string value.



32

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So here inside of the sniffer as you can see I'm saying that return string data format.



33

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And he had set up these double codes.



34

00:02:00,510 --> 00:02:04,580

I am actually specifying the format of my string value.



35

00:02:04,620 --> 00:02:05,120

OK.



36

00:02:05,160 --> 00:02:06,030

Per Cent.



37

00:02:06,150 --> 00:02:10,670

So here this token person this is actually referring to this name here.



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OK this string value call in person s gets name or key person in a newline character and other person.



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So these rules here as you can see is for just a token as you can see here call it space person as sort



40

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this person as is for this gets rules OK and a person in a newline character and person s as you can



41

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see here is for this uniform.



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00:02:36,030 --> 00:02:36,520

OK.



43

00:02:36,620 --> 00:02:37,970

Kallen space.



44

00:02:38,130 --> 00:02:40,540

We have another person as here gets uniform.



45

00:02:40,660 --> 00:02:44,970

OK a person as a person in as you can see here.



46

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This is a new character.



47

00:02:46,270 --> 00:02:48,190

We have another person is here.



48

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So this person is Fortius spit required here.



49

00:02:51,930 --> 00:02:54,320

Co-lead Space Person D.



50

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Ok so this person is for this gets speed required.



51

00:02:58,030 --> 00:03:04,750

Ok person has a new line character person s and this person is for this power requires.



52

00:03:04,770 --> 00:03:07,700

And as you can see here Colan space person.



53

00:03:07,830 --> 00:03:10,460

So this person is what this gets power required.



54

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OK.



55

00:03:11,610 --> 00:03:13,580

So hopefully death makes sense.



56

00:03:13,620 --> 00:03:16,380

And now let's actually go inside of this box in class.



57

00:03:16,410 --> 00:03:16,860

OK.



58

00:03:16,980 --> 00:03:18,500

Now I want to actually.



59

00:03:18,570 --> 00:03:21,530

So as you know boxing is actually a sport.



60

00:03:21,540 --> 00:03:22,130

OK.



61

00:03:22,140 --> 00:03:28,250

So there is actually an is a relationship between the boxing class and this sport class.



62

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So here again to say it extends sport.



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00:03:30,900 --> 00:03:33,860

So now as you can see the compiler is actually complaining.



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00:03:34,140 --> 00:03:39,180

And let's actually hover on a mouse pointer over the area and see what's the error.



65

00:03:39,210 --> 00:03:46,510

Plus boxing must either be declared abstract OK or implement abstract method.



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00:03:46,570 --> 00:03:48,550

Evaluate cost of insurance.



67

00:03:48,750 --> 00:03:57,240

So as you know boxing is not an abstract concept so we need to actually implement the cost of insurance



68

00:03:57,540 --> 00:04:02,060

a method that is actually declared inside of these life insurance interface.



69

00:04:02,160 --> 00:04:07,150

So because we are actually inheriting all of the features and behaviors that it inside of this support



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00:04:07,150 --> 00:04:14,250

class and this support class actually implements this life insurance interface here inside of this boxing



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00:04:14,250 --> 00:04:20,760

class we need to actually overwrite the abstract method that is inside of this life insurance interface



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as you can see here.



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00:04:21,810 --> 00:04:22,160

OK.



74

00:04:22,170 --> 00:04:27,240

So hopefully that makes sense now necessarily actually putting some more lines of code here.



75

00:04:27,330 --> 00:04:27,780

OK.



76

00:04:27,780 --> 00:04:32,770

Now inside of this box in class that's actually declare some instance variables.



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00:04:32,820 --> 00:04:33,580

OK.



78

00:04:33,930 --> 00:04:37,270

So here as you can see I declare these these instance variables.



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00:04:37,290 --> 00:04:37,700

OK.



80

00:04:37,710 --> 00:04:42,030

Int punching power required int punching speed required.



81

00:04:42,120 --> 00:04:44,430

And ain't a cost of insurance.



82

00:04:44,460 --> 00:04:48,320

So let's actually declare these instance variables as private.



83

00:04:48,660 --> 00:04:49,160

OK.



84

00:04:49,200 --> 00:04:54,990

Private and hear private and private.



85

00:04:55,500 --> 00:04:56,080

OK.



86

00:04:56,400 --> 00:05:00,730

So now they essentially create a constructor for these in class.



87

00:05:00,770 --> 00:05:05,770

So inside of this box in class I'm going to actually pasting this constructor here and then I'm going



88

00:05:05,770 --> 00:05:08,500

to explain to you what's going on here.



89

00:05:08,530 --> 00:05:12,710

So as you can see here we have a constructor here Puplick public boxing.



90

00:05:12,910 --> 00:05:19,900

And here as you can see this box image actually does boxing constructor actually accepts some arguments.



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00:05:19,900 --> 00:05:20,300

OK.



92

00:05:20,390 --> 00:05:27,810

String name string rules string uniform and speed required into power required.



93

00:05:27,940 --> 00:05:29,110

And as you can see here.



94

00:05:29,170 --> 00:05:33,910

Punching power required and punching sweetly quiet.



95

00:05:34,030 --> 00:05:38,090

And it cost of insurance and inside that is constructive.



96

00:05:38,290 --> 00:05:44,030

Because I am actually inheriting all of the features and behaviors that are inside of this sports class.



97

00:05:44,170 --> 00:05:47,520

We need to initialize the constructor of the superclass.



98

00:05:47,620 --> 00:05:51,360

So super name rules uniform.



99

00:05:51,870 --> 00:05:54,120

Spaeth required and power required.



100

00:05:54,160 --> 00:05:54,640

OK.



101

00:05:54,880 --> 00:05:58,930

And then we can actually instantiate our own instance variables.



102

00:05:58,930 --> 00:05:59,510

OK.



103

00:05:59,800 --> 00:06:05,650

This does punching power required assignments operator punching power required.



104

00:06:05,680 --> 00:06:06,160

OK.



105

00:06:06,430 --> 00:06:12,730

Does that punching Spitze required as you can see here I am referring to this instance variable assignment



106

00:06:12,760 --> 00:06:15,120

operator punching required.



107

00:06:15,160 --> 00:06:15,610

OK.



108

00:06:15,670 --> 00:06:19,430

And does that cost that insurance assignment operator.



109

00:06:19,540 --> 00:06:21,010

Cost of insurance.



110

00:06:21,040 --> 00:06:21,790

OK.



111

00:06:22,000 --> 00:06:23,450

So hopefully that makes sense.



112

00:06:23,470 --> 00:06:28,750

Now let's actually create a Getaround the Center for these two instance variables are key punching power



113

00:06:28,750 --> 00:06:30,800

required and punching speeds required.



114

00:06:30,820 --> 00:06:31,710

OK.



115

00:06:31,750 --> 00:06:36,880

We don't need to actually create or get her the city for this cluster insurance instance variable.



116

00:06:36,960 --> 00:06:37,580

OK.



117

00:06:37,780 --> 00:06:44,410

So here again just slightly and say that this class generate and get here and sit here and here for



118

00:06:44,410 --> 00:06:50,920

these two instance variables punching power required and this instance valuable punching Kuspit require



119

00:06:51,070 --> 00:06:54,980

you selectees instance variables and then click on OK.



120

00:06:55,060 --> 00:07:01,530

So as you can see the ID actually automatically generated these instance variables for us.



121

00:07:01,600 --> 00:07:04,040

These are these getters and setters for us.



122

00:07:04,080 --> 00:07:04,680

Okay.



123

00:07:05,140 --> 00:07:12,310

And now let's actually overwrite the Evaluate cost of insurance Smurfit that is inside of this life



124

00:07:12,310 --> 00:07:14,250

insurance interface.



125

00:07:14,440 --> 00:07:20,610

So here because of your inheriting all of the features and behaviors that are inside of this sport class.



126

00:07:20,610 --> 00:07:20,860

Okay.



127

00:07:20,860 --> 00:07:27,100

So let's to go inside of this sort of last year and this sports class actually implements life insurance



128

00:07:27,190 --> 00:07:34,870

interface this boxing class must actually provide an implementation for these for there are costs of



129

00:07:34,870 --> 00:07:39,000

insurance Smurfette that is in say that this life insurance interface.



130

00:07:39,080 --> 00:07:46,120

So inside of this boxing class I as I say pain evaluates a cost of insurance Mefford as you can see



131

00:07:46,120 --> 00:07:53,810

here and here we are actually operating disparate public double evaluate cost of insurance.



132

00:07:53,810 --> 00:07:59,950

So let's actually delete this implementation here and now we can i should be putting our own implementations



133

00:08:00,250 --> 00:08:01,970

inside of this method.



134

00:08:01,990 --> 00:08:02,440

OK.



135

00:08:02,500 --> 00:08:04,680

So here I can just type in return.



136

00:08:04,690 --> 00:08:05,770

Cost of insurance.



137

00:08:05,800 --> 00:08:06,570

Semicolon.



138

00:08:06,850 --> 00:08:07,510

OK.



139

00:08:07,510 --> 00:08:13,620

So inside of this Meffert I'm just returning the value of this a custom insurance instance variable



140

00:08:13,640 --> 00:08:17,260

that I like that I actually created inside of this box in class.



141

00:08:17,380 --> 00:08:17,750

OK.



142

00:08:17,800 --> 00:08:23,710

And here after the Smurfit after the Indian curly brace up this my fit and inside of this boxing class



143

00:08:24,030 --> 00:08:29,790

let's actually override the twisting method that we actually inherited from the superclass.



144

00:08:29,800 --> 00:08:33,110

So what is the superclass the superclass is the sport class.



145

00:08:33,160 --> 00:08:33,600

OK.



146

00:08:33,700 --> 00:08:36,190

And we can actually inherit this method.



147

00:08:36,310 --> 00:08:36,830

OK.



148

00:08:36,940 --> 00:08:41,490

So inside of this boxing class here again just typing to a stranger.



149

00:08:42,070 --> 00:08:45,400

And let's actually delete this line of code here.



150

00:08:45,670 --> 00:08:47,890

And let's actually put in our own implementations.



151

00:08:47,920 --> 00:08:51,170

That is actually specific only to the boxing class here.



152

00:08:51,280 --> 00:08:56,800

OK so now I'm going to actually pasting some lines of code here and then I'm going to actually explain



153

00:08:56,800 --> 00:08:58,520

to you what's going on here.



154

00:08:58,540 --> 00:08:59,560

OK.



155

00:08:59,560 --> 00:09:04,740

So as you can see here this is the implementation that we actually put in here.



156

00:09:04,810 --> 00:09:09,290

OK return string format here and inside double quotes.



157

00:09:09,340 --> 00:09:13,740

I am actually specifying the format of my string value so person s.



158

00:09:13,840 --> 00:09:18,780

So this person as here had this token is actually for this super string here.



159

00:09:18,820 --> 00:09:19,300

OK.



160

00:09:19,300 --> 00:09:20,680

So super eject.



161

00:09:20,840 --> 00:09:23,030

I should be the first to the superclass.



162

00:09:23,140 --> 00:09:26,040

So the superclass is actually this sport class.



163

00:09:26,110 --> 00:09:26,560

OK.



164

00:09:26,680 --> 00:09:29,700

And inside of this sport class we have these two strings left.



165

00:09:29,710 --> 00:09:30,300

OK.



166

00:09:30,560 --> 00:09:36,290

So if this boxing class as you can see he actually called these are two string Meffert on this super.



167

00:09:36,340 --> 00:09:36,910

OK.



168

00:09:36,910 --> 00:09:42,580

So here as you can see we are actually going to actually execute these lines of code that are actually



169

00:09:42,580 --> 00:09:45,870

inside of these two string Mefford here as you can see.



170

00:09:46,330 --> 00:09:50,370

And then here it's going to return these values.



171

00:09:50,380 --> 00:09:56,730

Ok for example gets name cathedral's gets you any form gets speed required and gets our power required.



172

00:09:56,770 --> 00:09:57,180

OK.