1 00:00:00,360 --> 00:00:07,230 And as you can see here we've got two other arguments here which are actually specific to this chat 2 00:00:07,230 --> 00:00:07,950 class. 3 00:00:07,950 --> 00:00:08,270 OK. 4 00:00:08,280 --> 00:00:16,030 As you can see in line 18 and in line 19 100 in initialising those are instance variables here. 5 00:00:16,080 --> 00:00:16,600 OK. 6 00:00:16,680 --> 00:00:24,120 These That number of leks assignment operator number of legs this that can hunt other animals assignment 7 00:00:24,150 --> 00:00:26,380 operator can hunt other animals. 8 00:00:26,400 --> 00:00:26,940 OK. 9 00:00:27,090 --> 00:00:29,080 So hopefully that makes sense. 10 00:00:29,100 --> 00:00:33,120 And now let's actually scroll down here. 11 00:00:33,780 --> 00:00:35,540 As you can see we've got another error here. 12 00:00:35,550 --> 00:00:36,260 OK. 13 00:00:36,660 --> 00:00:45,000 So here we are actually overwriting our Meffert that is inside of the superclass this cat class inherits 14 00:00:45,360 --> 00:00:49,740 all of the features that are inside of this Animal class. 15 00:00:49,860 --> 00:00:50,440 OK. 16 00:00:50,670 --> 00:00:56,700 And this animal class inherits all of the features that are inside of this object class. 17 00:00:56,820 --> 00:01:05,420 OK so this Kathe class indirectly inherits all of the features that are inside of this object class. 18 00:01:05,460 --> 00:01:09,700 OK so we can actually access methods that are inside of this object class. 19 00:01:09,720 --> 00:01:10,350 OK. 20 00:01:10,800 --> 00:01:11,800 OK everyone. 21 00:01:11,820 --> 00:01:16,240 Now let's go back inside the cat class as you can see here. 22 00:01:16,350 --> 00:01:21,150 Now we need to actually put our own implementations inside these two string method. 23 00:01:21,150 --> 00:01:21,740 OK. 24 00:01:21,990 --> 00:01:26,070 And the Smurfette needs to return a value of type string here. 25 00:01:26,070 --> 00:01:26,510 OK. 26 00:01:26,610 --> 00:01:30,160 As you can see the return type of this method is strange. 27 00:01:30,300 --> 00:01:33,070 So we need to return a value of type string. 28 00:01:33,140 --> 00:01:36,210 Ok so I just need to type in here return. 29 00:01:36,810 --> 00:01:42,140 Strange that format and an inside Apprentice's. 30 00:01:42,180 --> 00:01:46,230 First of all I need to actually specify the formatting instructions here. 31 00:01:46,230 --> 00:01:47,070 OK. 32 00:01:47,250 --> 00:01:51,570 So inside the double quotes I can actually specify the formatting instructions. 33 00:01:51,570 --> 00:01:52,070 OK. 34 00:01:52,350 --> 00:01:58,080 So first of all I want to actually output the name of my cat object. 35 00:01:58,230 --> 00:02:06,540 So first I need to just typing percent as so as you can see here this talken actually is for arguments 36 00:02:06,870 --> 00:02:08,340 of type stream. 37 00:02:08,400 --> 00:02:13,490 Ok so person as Colon again per s. 38 00:02:13,740 --> 00:02:18,230 And then I want actually to output the color of my chat object. 39 00:02:18,270 --> 00:02:28,620 So again persons as co-lead percent S and then Ivon to actually outputs the amount of speed of my chat 40 00:02:28,650 --> 00:02:34,810 object to the screen percent as Colan percent. 41 00:02:35,600 --> 00:02:45,160 And here I want to actually output the value of this amount of power instance variable to the screen. 42 00:02:45,300 --> 00:02:49,540 So again present as Colan percent the. 43 00:02:50,250 --> 00:02:56,100 And then I want to output the value of the number of legs instance variable to the screen. 44 00:02:56,100 --> 00:03:00,080 So percent as Colan percent D. 45 00:03:00,750 --> 00:03:04,490 And then I want to actually output the value of this boolean value. 46 00:03:04,490 --> 00:03:06,300 Bell can hunt other animals. 47 00:03:06,380 --> 00:03:12,150 OK so percent as Colan per cent B this time. 48 00:03:12,180 --> 00:03:12,530 OK. 49 00:03:12,540 --> 00:03:16,240 Person B is for actually variabilis of type Boolean. 50 00:03:16,240 --> 00:03:22,030 OK so now I need to actually specify the arguments for these tokens here OK. 51 00:03:22,170 --> 00:03:26,430 So first of all I need to actually put a value of type string here. 52 00:03:26,430 --> 00:03:29,870 OK just putting two double quotes OK. 53 00:03:29,970 --> 00:03:37,080 And then inside the double quotes I just type in name and then I specify the name instance variable 54 00:03:37,380 --> 00:03:43,820 comma and then I actually putting two double quotes here. 55 00:03:44,340 --> 00:03:49,800 Here as you can see if you need to actually specify So as you can see here this name instance variable 56 00:03:49,920 --> 00:03:50,930 is for distortion. 57 00:03:50,940 --> 00:03:51,610 OK. 58 00:03:51,780 --> 00:03:55,770 So again we need to actually specify a value of type string here. 59 00:03:55,800 --> 00:03:57,360 Color comma. 60 00:03:57,630 --> 00:04:02,010 And then I refer to the name of the color instance variable comma. 61 00:04:02,940 --> 00:04:08,620 As you can see here again it's actually putting a value of type string here. 62 00:04:08,730 --> 00:04:15,780 So I just put into double quotes here and then I just type in speed comma. 63 00:04:16,350 --> 00:04:22,130 And now I need to actually put a value of type integer as you can see person D. 64 00:04:22,230 --> 00:04:25,910 Here is Torchin is for arguments of type integer k. 65 00:04:26,190 --> 00:04:31,540 So I just need to put an amount of speed. 66 00:04:32,110 --> 00:04:32,770 OK. 67 00:04:33,060 --> 00:04:34,160 Comma. 68 00:04:35,040 --> 00:04:38,520 And then I need to actually again put in a value of type. 69 00:04:38,530 --> 00:04:43,620 Strange as you can see this talken is for arguments of types 3. 70 00:04:43,710 --> 00:04:47,430 So I just need to put into double quotes here and that inside the double quotes. 71 00:04:47,440 --> 00:04:49,910 I can just type in power. 72 00:04:50,670 --> 00:04:51,250 OK. 73 00:04:51,410 --> 00:04:52,130 Comma. 74 00:04:52,410 --> 00:04:55,510 And then I need to actually put a value of type integer. 75 00:04:55,680 --> 00:04:59,550 So as you can see here this amount of power is of type integer. 76 00:04:59,550 --> 00:05:04,980 So I just refer to the name of the amount of power instance variable here. 77 00:05:05,280 --> 00:05:10,620 Amount of power. 78 00:05:11,020 --> 00:05:11,580 OK. 79 00:05:11,710 --> 00:05:13,060 Comma. 80 00:05:13,410 --> 00:05:19,920 So now let's actually create a new line here in order to make these values more readable. 81 00:05:19,920 --> 00:05:20,510 OK. 82 00:05:20,790 --> 00:05:23,050 So as you can see here I'm out of power. 83 00:05:23,280 --> 00:05:26,520 And then again I need to put in a value of type 3 in here. 84 00:05:26,550 --> 00:05:30,640 As you can see this token is for arguments of type. 85 00:05:30,730 --> 00:05:31,480 Strange. 86 00:05:31,770 --> 00:05:37,610 So I just need to put into double quotes here and then instead of double quotes I can just type in number 87 00:05:39,860 --> 00:05:41,650 of. 88 00:05:41,950 --> 00:05:43,000 Come on. 89 00:05:43,480 --> 00:05:43,960 OK. 90 00:05:44,060 --> 00:05:47,250 So as you can see here we've got this percent here. 91 00:05:47,410 --> 00:05:51,860 So Vinita actually putting up a value of type integer here. 92 00:05:51,920 --> 00:05:56,970 So I just referred to the name of the to the name of this number of X instance variable. 93 00:05:57,320 --> 00:06:06,980 So I just type in number of Lex comma and then here again we need to actually putting a value of type 94 00:06:06,980 --> 00:06:07,950 string here. 95 00:06:08,120 --> 00:06:11,660 So I just put into double quotes and then inside it up called. 96 00:06:11,780 --> 00:06:18,310 I just type in fight comma and then I mean to actually putting a value of type Boolean. 97 00:06:18,410 --> 00:06:19,750 OK percent B. 98 00:06:20,090 --> 00:06:25,830 So I just referred to the name of these can hunt other animals instance variable OK. 99 00:06:26,180 --> 00:06:31,610 Can hunt other animals and then I put in a semi-colon at the end of my statement. 100 00:06:31,970 --> 00:06:34,450 So as you can see here we've got some errors here. 101 00:06:34,460 --> 00:06:34,860 OK. 102 00:06:34,880 --> 00:06:41,540 As you can see we cannot refer to this name instance variable or colorings instance variable or this 103 00:06:41,600 --> 00:06:47,240 amount of spit instance variable or maybe the amount of power or instance variable as you can see the 104 00:06:47,240 --> 00:06:53,550 color of this instance variables is red and this means we have an error in our class. 105 00:06:53,570 --> 00:07:01,310 So let's actually hover our mouse pointer over one of these are the read instance variables and see 106 00:07:01,310 --> 00:07:02,150 what's the error. 107 00:07:02,230 --> 00:07:08,720 Ok for example this name instance variable name has private access income. 108 00:07:08,780 --> 00:07:13,120 That example that maters I saw that that app for that animal. 109 00:07:13,250 --> 00:07:13,880 OK. 110 00:07:14,390 --> 00:07:18,440 So it says that this name instance variable. 111 00:07:18,590 --> 00:07:23,150 This is our instance variable that we declared inside this animal class. 112 00:07:23,180 --> 00:07:23,900 OK. 113 00:07:24,260 --> 00:07:31,880 And because inside this class we are actually inheriting all of the features and behaviors that are 114 00:07:31,940 --> 00:07:35,370 inside this animal class into these chat class. 115 00:07:35,420 --> 00:07:40,700 We actually access all of those instance variables and methods that are inside this element class. 116 00:07:40,700 --> 00:07:41,130 OK. 117 00:07:41,180 --> 00:07:47,810 Actually the doors are private parts of this animal class are actually part of this chat class but those 118 00:07:48,020 --> 00:07:51,400 private parts are not visible to this class. 119 00:07:51,410 --> 00:07:52,020 OK. 120 00:07:52,250 --> 00:07:54,560 These private parts as you can see here. 121 00:07:54,560 --> 00:07:57,690 These are only visible to these animal class. 122 00:07:57,740 --> 00:08:03,440 We cannot actually access these instance variables from this cat's class. 123 00:08:03,440 --> 00:08:04,080 OK. 124 00:08:04,160 --> 00:08:07,880 Because this instance variables are declared as private. 125 00:08:08,120 --> 00:08:08,810 OK. 126 00:08:09,080 --> 00:08:15,380 So inside these chat class in order to solve this problem as you can see here it says These instance 127 00:08:15,380 --> 00:08:17,160 variables are declared as private. 128 00:08:17,180 --> 00:08:17,750 OK. 129 00:08:17,780 --> 00:08:26,300 So we need to actually access the getters and setters in order to access the value of this instance 130 00:08:26,300 --> 00:08:26,810 variables. 131 00:08:26,840 --> 00:08:35,500 OK so we can actually access this good amount of speed method here in order to access the value of this 132 00:08:35,510 --> 00:08:36,320 amount of speed. 133 00:08:36,320 --> 00:08:37,780 Instance variable OK. 134 00:08:38,030 --> 00:08:45,890 So inside this chat class here instead of just typing name instead of just referring to the name instance 135 00:08:45,890 --> 00:08:54,620 variable which is declared as private inside the animal class we can actually type in jets name. 136 00:08:55,550 --> 00:08:56,000 OK. 137 00:08:56,060 --> 00:08:58,040 As you can see now the error is gone. 138 00:08:58,310 --> 00:08:58,830 OK. 139 00:08:59,030 --> 00:09:06,710 So here again instead of just referring to the name of this Karlov instance variable that is declared 140 00:09:06,770 --> 00:09:16,280 inside this animal class which end just typing gets color ok and it's the same story for the amount 141 00:09:16,280 --> 00:09:18,030 of speed instance variable. 142 00:09:18,140 --> 00:09:23,150 Here if you are actually referring to the name of this amount of speed instance valuable and here I 143 00:09:23,150 --> 00:09:24,320 can just type in amount. 144 00:09:24,360 --> 00:09:27,800 Get em out of speed. 145 00:09:28,040 --> 00:09:34,460 And again here we are actually referring to the name of this amount of power for instance variable and 146 00:09:34,700 --> 00:09:40,630 we can actually place this variable name to get amount of power. 147 00:09:41,000 --> 00:09:41,630 OK. 148 00:09:41,630 --> 00:09:46,230 And as you can see now the arrow is gone and we can easily run our project. 149 00:09:46,280 --> 00:09:51,710 OK so now let's actually go back inside the main activity that Java file here.