1 00:00:00,270 --> 00:00:03,810 And now I need to actually specify some arguments. 2 00:00:03,810 --> 00:00:07,270 So first I need to specify the speed of my car object. 3 00:00:07,290 --> 00:00:16,890 For example 90 comma and now I need to actually specify that whether my car object has a braking system 4 00:00:16,920 --> 00:00:17,510 or not. 5 00:00:17,610 --> 00:00:18,310 So true. 6 00:00:18,480 --> 00:00:19,250 OK. 7 00:00:19,250 --> 00:00:24,530 Come up and then I need to actually specify the number of wheels of my car object 4. 8 00:00:24,880 --> 00:00:33,330 Ok so now let's actually create another text you object in order to refer to the name of that text through 9 00:00:33,740 --> 00:00:35,140 which is related to the car object. 10 00:00:35,130 --> 00:00:35,800 OK. 11 00:00:36,360 --> 00:00:46,050 So inside this main activity or Java here text you x the car assignment operator and then I need to 12 00:00:46,050 --> 00:00:52,770 actually specify that this object is or is actually a text view object not a view object. 13 00:00:52,770 --> 00:01:04,310 So you are actually casting this object to text you find view by ID or dot ID Dot T X the car. 14 00:01:04,530 --> 00:01:05,200 OK. 15 00:01:05,400 --> 00:01:09,220 And I need to actually put in a semi-colon at the end of my statement. 16 00:01:09,260 --> 00:01:11,870 OK so now I can actually type in here. 17 00:01:11,920 --> 00:01:16,620 TXI the card that said text. 18 00:01:16,620 --> 00:01:19,940 And then I can actually refer to the name of this object. 19 00:01:19,950 --> 00:01:23,510 My car got to a strange Meffert. 20 00:01:23,530 --> 00:01:24,250 OK. 21 00:01:24,870 --> 00:01:28,020 And let's actually run our project and see what happens. 22 00:01:28,020 --> 00:01:32,510 So now as you can see here now these values are outputted the screen. 23 00:01:32,520 --> 00:01:33,040 OK. 24 00:01:33,180 --> 00:01:40,330 So speed 90 can break a true number of wheels and right speed is zero. 25 00:01:40,380 --> 00:01:46,650 And this value is because that we didn't actually call the right fit on this Michod object. 26 00:01:46,650 --> 00:01:47,240 OK. 27 00:01:47,370 --> 00:01:54,840 So now if we actually called that Smurfette on this Michod here and if I run my project again let's 28 00:01:54,840 --> 00:01:55,960 see what happens. 29 00:01:55,980 --> 00:01:56,330 OK. 30 00:01:56,340 --> 00:01:59,020 As you can see here now this value is outputted. 31 00:01:59,050 --> 00:02:01,130 This could 360. 32 00:02:01,140 --> 00:02:01,870 OK. 33 00:02:02,130 --> 00:02:04,020 So hopefully that makes sense. 34 00:02:04,050 --> 00:02:07,210 And now let's actually go inside this motorcycle class. 35 00:02:07,260 --> 00:02:14,250 So inside this motorcycle class again suppose that we don't have any characteristics that are specific 36 00:02:14,310 --> 00:02:16,130 only to the motorcycle class. 37 00:02:16,260 --> 00:02:22,870 So we need to actually create a constructor for this motorcycle class in order to actually. 38 00:02:23,310 --> 00:02:28,740 Because whenever we want to create an object from a motorcycle class that constructor is going to be 39 00:02:28,740 --> 00:02:29,140 called. 40 00:02:29,160 --> 00:02:29,890 OK. 41 00:02:30,420 --> 00:02:34,450 So if we can actually pass some values to that's true that constructor. 42 00:02:34,830 --> 00:02:40,290 So first of all let me point out that this motor cycle is actually a vehicle. 43 00:02:40,290 --> 00:02:40,810 OK. 44 00:02:41,010 --> 00:02:47,390 So we can inherit all of the features and behaviors that are inside the vehicle class. 45 00:02:47,400 --> 00:02:47,990 OK. 46 00:02:48,240 --> 00:02:54,990 So now I need to actually create a constructor for this a motorcycle class. 47 00:02:54,990 --> 00:02:59,740 Ok motor I need to actually put in a pair of round brackets here. 48 00:02:59,790 --> 00:03:05,670 I need to actually open and close this constructor by using these curly braces. 49 00:03:05,660 --> 00:03:13,440 And now I need to actually specify that some arguments here and we need to actually initialize the constructor 50 00:03:13,740 --> 00:03:17,640 of the superclass So the superclass of this class is vehicle. 51 00:03:17,760 --> 00:03:18,370 OK. 52 00:03:18,540 --> 00:03:21,590 And we need to actually initialize this constructor here. 53 00:03:21,750 --> 00:03:22,620 OK. 54 00:03:22,980 --> 00:03:25,110 So inside these motocycle class. 55 00:03:25,260 --> 00:03:31,710 So inside the constructor I can just type in super and inside the practice is here. 56 00:03:31,710 --> 00:03:34,100 Now I need to actually specify some arguments. 57 00:03:34,180 --> 00:03:45,570 Int speed comma boolean has braking system OK. 58 00:03:46,040 --> 00:03:52,130 Comma and int number of reals. 59 00:03:52,190 --> 00:03:53,180 OK. 60 00:03:53,840 --> 00:04:01,400 And inside the Prentice's of these superhit I can actually pass these values in order to initialize 61 00:04:01,700 --> 00:04:03,580 the constructor of the superclass. 62 00:04:03,610 --> 00:04:10,340 OK so Spaeth comma has braking system comma number of fields. 63 00:04:10,430 --> 00:04:11,110 OK. 64 00:04:11,810 --> 00:04:13,570 So hopefully that makes sense. 65 00:04:14,330 --> 00:04:20,810 And then I want to actually override the twist through my fate that is inside the superclass. 66 00:04:20,810 --> 00:04:22,870 So the superclass is vehicle. 67 00:04:22,890 --> 00:04:24,730 I can actually override this method. 68 00:04:24,830 --> 00:04:25,670 As you can see here. 69 00:04:25,670 --> 00:04:26,190 OK. 70 00:04:26,240 --> 00:04:32,000 So instead of a motorcycle class I can just refer to the name of that if it were strange and it is can 71 00:04:32,000 --> 00:04:39,780 I actually execute the implementations of the twisting my faith that is inside these superclass. 72 00:04:39,800 --> 00:04:40,290 OK. 73 00:04:40,430 --> 00:04:42,200 So hopefully that makes sense. 74 00:04:42,200 --> 00:04:48,200 So now let's actually go inside this main activity that Javal fight here and now we need to actually 75 00:04:48,230 --> 00:04:51,890 create an object from this motorcycle class. 76 00:04:51,890 --> 00:04:52,450 OK. 77 00:04:52,790 --> 00:04:58,380 So I can't just refer to the name of that class motorcycle the name of this object is my motorcycle 78 00:04:58,910 --> 00:05:01,880 and then I put an assignment operator here. 79 00:05:01,970 --> 00:05:05,900 New motor cycle OK. 80 00:05:06,290 --> 00:05:09,120 And now it is actually passing some values. 81 00:05:09,380 --> 00:05:16,030 So the speed of my motor cycle is for example 500 karma has braking system. 82 00:05:16,030 --> 00:05:19,220 True karma number of wheels too. 83 00:05:19,490 --> 00:05:20,260 OK. 84 00:05:20,300 --> 00:05:24,640 And then I need to actually put in a semi-colon at the end of my statement. 85 00:05:24,650 --> 00:05:34,090 So now let's actually create another text you object text you and the name of this object is TXI the 86 00:05:34,300 --> 00:05:36,470 motor cycle 87 00:05:39,050 --> 00:05:40,220 OK. 88 00:05:41,130 --> 00:05:48,060 And let's actually put in an assignment operator here and then we need to actually cast this object 89 00:05:48,060 --> 00:05:57,150 to a text view object find view by ID or that Id dot t the motorcycle OK. 90 00:05:57,450 --> 00:06:05,950 So now let's actually to change these chapiter see to our lowercase C.. 91 00:06:06,570 --> 00:06:08,880 OK. 92 00:06:09,030 --> 00:06:13,440 And then we can actually call our Mefford right on the spot. 93 00:06:13,470 --> 00:06:17,730 My motorcycle object so my motorcycle object. 94 00:06:17,790 --> 00:06:19,110 That's right. 95 00:06:19,170 --> 00:06:19,910 OK. 96 00:06:20,160 --> 00:06:28,320 And then we can actually output these values through the screen dots and text my motorcycle dot to a 97 00:06:28,320 --> 00:06:29,050 string. 98 00:06:29,390 --> 00:06:30,240 OK. 99 00:06:30,390 --> 00:06:32,270 So hopefully that makes sense. 100 00:06:32,280 --> 00:06:35,170 Now let's actually run our project and see what happens. 101 00:06:35,250 --> 00:06:36,160 OK everyone. 102 00:06:36,240 --> 00:06:39,300 Now as you can see these values are outputted to the screen. 103 00:06:39,300 --> 00:06:45,800 OK speed 500 can break through number of wheels to right speed 1000. 104 00:06:45,810 --> 00:06:46,560 OK. 105 00:06:46,980 --> 00:06:48,890 So hopefully that makes sense. 106 00:06:48,930 --> 00:06:51,140 Now I want to actually do something here. 107 00:06:51,150 --> 00:06:51,820 OK. 108 00:06:52,200 --> 00:06:59,180 So now I want to actually when a person clicks on this go button here I want to just text you here to 109 00:06:59,190 --> 00:06:59,640 respond. 110 00:06:59,640 --> 00:07:00,190 OK. 111 00:07:00,210 --> 00:07:04,720 So for example when I click on the scope button here I want this text to change. 112 00:07:04,770 --> 00:07:05,280 OK. 113 00:07:05,400 --> 00:07:08,650 So let's go back and say this main activity that you have a file here. 114 00:07:08,790 --> 00:07:17,940 And let's actually create another test you here text through the result and then I put an assignment 115 00:07:17,970 --> 00:07:25,200 operator and here I actually cast this object to a text view object and then I just type in here find 116 00:07:25,320 --> 00:07:30,390 view by id r that ID that T X the results. 117 00:07:30,570 --> 00:07:31,140 OK. 118 00:07:31,320 --> 00:07:34,730 And then I put a semicolon at the end of my statement. 119 00:07:34,740 --> 00:07:41,880 Now I want to actually are referring to the bottom to the bottom that we actually put inside this content 120 00:07:41,940 --> 00:07:43,010 underline minute example. 121 00:07:43,050 --> 00:07:43,800 OK. 122 00:07:44,280 --> 00:07:50,370 So inside this main activity the Java as you can see here you actually created four different objects 123 00:07:50,400 --> 00:07:51,800 from this text class. 124 00:07:51,840 --> 00:07:52,580 OK. 125 00:07:52,990 --> 00:07:55,220 You have another class called Potten. 126 00:07:55,440 --> 00:07:58,200 So now we need to actually create a potent object. 127 00:07:58,240 --> 00:08:00,030 OK button. 128 00:08:00,540 --> 00:08:00,970 OK. 129 00:08:00,990 --> 00:08:02,560 PTEN go. 130 00:08:02,760 --> 00:08:03,330 OK. 131 00:08:03,510 --> 00:08:09,480 And then I put an assignment operator here and here we need to actually cast this object to about an 132 00:08:09,480 --> 00:08:10,260 object. 133 00:08:10,440 --> 00:08:16,770 And remember that despite an object actually inherits all of the features and behaviors that are inside 134 00:08:16,770 --> 00:08:18,560 the tick view class. 135 00:08:18,580 --> 00:08:22,470 OK so we need to actually cast this object to our putten object. 136 00:08:22,890 --> 00:08:30,450 And then here we can actually type in find view ID or that ID that PTEN go. 137 00:08:30,560 --> 00:08:31,770 OK. 138 00:08:31,920 --> 00:08:34,970 And then I put a semi-colon at the end of my statement. 139 00:08:34,980 --> 00:08:38,830 So let's actually hold the comment key and then click on this button here. 140 00:08:39,300 --> 00:08:45,960 As you can see here BOTTEN actually inherits all of the features and behaviors that are inside this 141 00:08:46,170 --> 00:08:46,950 text class. 142 00:08:46,950 --> 00:08:47,570 OK. 143 00:08:47,880 --> 00:08:52,970 So let's actually hold the common key again and then we can just text you here. 144 00:08:53,340 --> 00:08:58,940 So as you can see here this takes through inherits all of the features and behaviors that are inside 145 00:08:59,000 --> 00:09:00,160 this view class. 146 00:09:00,480 --> 00:09:07,260 So this bottom class actually indirectly inherits all of the features and behaviors that are inside 147 00:09:07,260 --> 00:09:08,240 the view class. 148 00:09:08,250 --> 00:09:08,780 OK. 149 00:09:09,090 --> 00:09:13,320 So we can say that the button is actually a view. 150 00:09:13,380 --> 00:09:14,250 OK. 151 00:09:14,730 --> 00:09:16,040 So hopefully that makes sense.