1 00:00:00,300 --> 00:00:01,880 The superclass is the Object class. 2 00:00:01,890 --> 00:00:02,750 OK. 3 00:00:03,210 --> 00:00:08,500 And inside the Meffert as you can see here it says Return So pair that to a stranger. 4 00:00:08,580 --> 00:00:15,900 It means that it can actually implement the codes that are inside the two string Mefford inside the 5 00:00:15,900 --> 00:00:16,680 Object class. 6 00:00:16,680 --> 00:00:17,120 OK. 7 00:00:17,160 --> 00:00:19,140 It's going to implement this line of code here. 8 00:00:19,470 --> 00:00:20,640 OK. 9 00:00:20,640 --> 00:00:27,270 So we don't want this line of code to be executed in our chat class so I don't want these super strange 10 00:00:28,140 --> 00:00:30,790 code to be executed so I just delete it here. 11 00:00:30,810 --> 00:00:31,210 OK. 12 00:00:31,230 --> 00:00:32,840 So our superclass is object. 13 00:00:32,850 --> 00:00:33,280 OK. 14 00:00:33,330 --> 00:00:34,520 Object here. 15 00:00:34,890 --> 00:00:35,510 OK. 16 00:00:35,700 --> 00:00:37,520 And when it says Return a super. 17 00:00:37,530 --> 00:00:43,660 That was three and it means that this class implements this code that is inside these two string method. 18 00:00:43,680 --> 00:00:44,680 OK. 19 00:00:44,700 --> 00:00:49,800 So let's go back inside the chatter Java class here and now I want to actually put my implementations 20 00:00:50,070 --> 00:00:50,920 inside this method. 21 00:00:50,930 --> 00:00:55,570 OK I want to actually put my own code inside this method OK. 22 00:00:55,590 --> 00:00:59,130 That is actually specifically related to these cathe class. 23 00:00:59,220 --> 00:01:00,070 OK. 24 00:01:00,390 --> 00:01:08,880 So inside this Meffert I just need to type in here return as three dot format and then inside Apprentice's 25 00:01:08,970 --> 00:01:13,200 I need to actually specify the format of this string value. 26 00:01:13,200 --> 00:01:16,930 So as you can see here the Smurfette returns a value of type string. 27 00:01:16,960 --> 00:01:19,990 Ok the return type of this method is strange. 28 00:01:20,010 --> 00:01:23,060 So we need to actually return a value of string here. 29 00:01:23,160 --> 00:01:25,320 Returns 3 in that format. 30 00:01:25,560 --> 00:01:29,740 And first of all I want to actually specify the formatting instructions. 31 00:01:29,940 --> 00:01:39,300 So I just put into double quotes and then inside the double quotes I just type in percent as Colon space 32 00:01:39,450 --> 00:02:03,020 per cent as space percent as Colon percent as space persons as Colon space per cent the space present 33 00:02:03,200 --> 00:02:13,950 as Colon space percent the space per cent as space per cent. 34 00:02:15,000 --> 00:02:21,990 And then I actually put a comma here and now I want to actually specify the arguments that are going 35 00:02:21,990 --> 00:02:23,940 to be related to these tokens here. 36 00:02:23,940 --> 00:02:24,420 OK. 37 00:02:24,480 --> 00:02:30,120 So for example for this token here I need to actually specify an argument of type 3. 38 00:02:30,270 --> 00:02:30,750 OK. 39 00:02:30,810 --> 00:02:35,020 Because this talking is per cent as is stands for strange. 40 00:02:35,050 --> 00:02:38,300 OK so s is for string values. 41 00:02:38,480 --> 00:02:40,240 Ok so I just need to type in here. 42 00:02:40,290 --> 00:02:47,600 So I just need to put in two double quotes here name as you can see I put a string literal here. 43 00:02:47,820 --> 00:02:50,480 This name is for this a token here. 44 00:02:50,850 --> 00:02:53,080 And our second talken is present as. 45 00:02:53,100 --> 00:02:57,430 So we need to actually specify an argument of type strange name. 46 00:02:57,510 --> 00:03:05,270 I refer to the name of the name instance variable which is of type string here comma and that our first 47 00:03:05,300 --> 00:03:08,100 Torchin it again is present as. 48 00:03:08,190 --> 00:03:13,160 So I just need to put in into double quotes here and that inside the double quotes I just type in color 49 00:03:14,270 --> 00:03:16,420 and then I put a comma here. 50 00:03:17,040 --> 00:03:21,420 And as you can see here again are form of talken is percent. 51 00:03:21,450 --> 00:03:25,020 So when you actually put a value of type three in here. 52 00:03:25,020 --> 00:03:29,180 So I just refer to the name of the color instance variable comma. 53 00:03:29,460 --> 00:03:34,390 Again our fifth fortune is present as as you can see here. 54 00:03:34,410 --> 00:03:37,490 So we need to actually specify an argument of type strength. 55 00:03:37,680 --> 00:03:40,990 So I just need to put in two double quotes here instead of double quotes. 56 00:03:41,010 --> 00:03:49,070 I just type again just typing speed and then I put a comma here and then as you can see here percent 57 00:03:49,120 --> 00:03:49,580 D. 58 00:03:49,680 --> 00:03:53,180 So we need to actually put an argument of type integer. 59 00:03:53,190 --> 00:03:58,860 So I just need to refer to the name of the amount of speed instance variable and then I put a comma 60 00:03:58,860 --> 00:03:59,450 here. 61 00:03:59,790 --> 00:04:07,380 And again here I need to actually specify an argument of types 3 in here because this token here is 62 00:04:07,380 --> 00:04:08,310 percent. 63 00:04:08,530 --> 00:04:09,270 OK. 64 00:04:09,540 --> 00:04:18,330 So I just need to put into double quotes power and then I put a comma here and again as you can see 65 00:04:19,230 --> 00:04:21,850 distortion here is percent D. 66 00:04:21,900 --> 00:04:26,550 So we need to actually put an argument of type integer here. 67 00:04:26,550 --> 00:04:32,470 So we just need to refer to the name of the amount of the name of the amount of power the instance variable. 68 00:04:32,850 --> 00:04:34,670 And then I put a comma here. 69 00:04:35,010 --> 00:04:38,780 And as you can see here again we have a present as here. 70 00:04:38,880 --> 00:04:45,630 So we need to actually put a value of type 3 in here so I can just refer here so I can just put in two 71 00:04:45,630 --> 00:04:47,320 double quotes here and there. 72 00:04:47,340 --> 00:04:52,440 Inside the double quotes I can just type in number of legs and then I put a comma here. 73 00:04:52,680 --> 00:04:56,690 And as you can see here we have these percent D here. 74 00:04:56,700 --> 00:05:00,140 So we need to actually put up an argument of type integer. 75 00:05:00,240 --> 00:05:05,340 So I can just refer to the name of the name of the number of legs instance variable. 76 00:05:06,000 --> 00:05:10,180 And we have another instance variable here which is of type Boolean. 77 00:05:10,200 --> 00:05:10,770 OK. 78 00:05:10,980 --> 00:05:16,710 So in order to specify that we are going to actually put up a boolean value here. 79 00:05:17,040 --> 00:05:19,030 We need to actually put a token here. 80 00:05:19,040 --> 00:05:23,350 OK for the boolean value Bellis so we can just put in percent B. 81 00:05:23,640 --> 00:05:26,370 So this percent B is for boolean variables. 82 00:05:26,400 --> 00:05:34,520 OK so here I can't just put a comma here and then I can just refer to the name of my instance variable. 83 00:05:34,740 --> 00:05:37,110 Chan hont other animals. 84 00:05:37,120 --> 00:05:37,770 OK. 85 00:05:38,130 --> 00:05:40,590 And then I put a semicolon here. 86 00:05:40,590 --> 00:05:47,810 So in order to specify what these I can hunt other animals instance variable relates to again just putting 87 00:05:48,120 --> 00:05:53,800 another string value here before this instance variable. 88 00:05:54,210 --> 00:06:04,050 So I can't just putting in a percent here and then I can just put in two double quotes here and here. 89 00:06:04,050 --> 00:06:04,800 Inside. 90 00:06:04,950 --> 00:06:10,700 Inside these double quotes I can just putting in for example fight. 91 00:06:11,730 --> 00:06:12,590 OK. 92 00:06:12,990 --> 00:06:14,810 And then I put a comma here. 93 00:06:15,210 --> 00:06:19,480 So now let's actually go back inside the main activity that Java right here. 94 00:06:19,500 --> 00:06:24,780 Now as you can see inline 42 I called this method on this Kathe one object here. 95 00:06:24,780 --> 00:06:25,370 OK. 96 00:06:25,380 --> 00:06:31,350 So because we write that these are two strings Meffert here is going to actually call only the Smurfette 97 00:06:31,350 --> 00:06:31,660 here. 98 00:06:31,680 --> 00:06:32,460 OK. 99 00:06:32,670 --> 00:06:34,380 So if I had on my project. 100 00:06:34,380 --> 00:06:36,240 Now let's see what happens. 101 00:06:36,240 --> 00:06:39,800 So as you can see here this is the value that is output at here. 102 00:06:39,810 --> 00:06:48,820 OK name my chat color white speed 40 power 50 number of legs for fight true. 103 00:06:49,260 --> 00:06:49,790 OK. 104 00:06:49,800 --> 00:06:52,110 So hopefully that makes sense. 105 00:06:52,140 --> 00:06:56,540 Now I want to actually show you again the power of inheritance in Java. 106 00:06:56,910 --> 00:07:03,450 Let's go back inside the cat the job fight here and now as you can see we've got a lot of duplicated 107 00:07:03,450 --> 00:07:07,450 codes that are inside the animal class here. 108 00:07:07,470 --> 00:07:08,160 OK. 109 00:07:08,400 --> 00:07:13,230 So as you can see in reality these two classes can be related to each other. 110 00:07:13,260 --> 00:07:17,050 This math class and this animal class can be related to each other. 111 00:07:17,160 --> 00:07:18,340 OK. 112 00:07:18,480 --> 00:07:21,640 And a cat can be an animal. 113 00:07:21,900 --> 00:07:29,760 So our cat is an animal so we can actually inherit from the Animal class. 114 00:07:29,760 --> 00:07:33,550 OK so Chad extends animal. 115 00:07:34,590 --> 00:07:35,510 OK. 116 00:07:36,090 --> 00:07:40,550 So as you can see here now it's going to actually show us some errors here. 117 00:07:40,920 --> 00:07:41,600 OK. 118 00:07:41,700 --> 00:07:49,290 So because if you are inheriting all of the features and behaviors that are inside the Animal class 119 00:07:49,870 --> 00:07:56,240 we can actually delete some of those duplicated coats for example DS for instance variables name color 120 00:07:56,310 --> 00:07:58,640 amount of speed and amount of power. 121 00:07:58,770 --> 00:08:05,700 We don't need these instance variables here because we are inheriting all of the behaviors and characteristics 122 00:08:05,910 --> 00:08:10,760 inside this Animal class as you can see because these are instance variables here. 123 00:08:10,860 --> 00:08:15,650 So we don't need these are instance variables inside the Kathe class. 124 00:08:15,660 --> 00:08:20,660 So if I just want to delete this instance variables here. 125 00:08:21,040 --> 00:08:26,240 Now I've got two instance variables that are related only to this math class. 126 00:08:26,250 --> 00:08:26,730 OK. 127 00:08:26,850 --> 00:08:29,490 Number of legs can hunt other animals. 128 00:08:29,490 --> 00:08:30,120 OK. 129 00:08:30,210 --> 00:08:35,270 So as you can see here let's actually delete some of these codes here. 130 00:08:35,280 --> 00:08:41,310 These getters and setters which we don't need them as you can see get get em out of power set amount 131 00:08:41,310 --> 00:08:45,580 of power get em out of speed set amount of speed get color get training. 132 00:08:45,750 --> 00:08:46,550 OK. 133 00:08:46,980 --> 00:08:50,520 And as you can see here we've got only these MFX here. 134 00:08:50,640 --> 00:08:57,760 Get our Chan hunt other animals so they can hunt other animals which is for this instance valuable here. 135 00:08:57,960 --> 00:09:03,230 And we've got a get in my faith for this number of legs instance variable here. 136 00:09:03,240 --> 00:09:03,760 OK. 137 00:09:03,870 --> 00:09:10,200 And as you can see here we can actually delete these lines of code here again and we can actually delete 138 00:09:10,440 --> 00:09:13,320 these arguments here. 139 00:09:13,650 --> 00:09:21,470 As you can see three color as you can see here in that amount of speed. 140 00:09:22,110 --> 00:09:24,200 OK we don't need this here. 141 00:09:24,630 --> 00:09:32,710 And we only need this number of legs soluble and these are Chan hont other animals valuable OK. 142 00:09:32,730 --> 00:09:38,490 And now here again we can actually change the implementation's that is inside these two string Mefford. 143 00:09:38,490 --> 00:09:43,260 So analogus actually did it this line of code here and then I'll actually show you how we can actually 144 00:09:43,260 --> 00:09:46,160 put our own code again in inside this Meffert here. 145 00:09:46,170 --> 00:09:46,570 OK. 146 00:09:46,620 --> 00:09:47,660 OK everyone. 147 00:09:47,660 --> 00:09:50,310 Now that's enough for this theater. 148 00:09:50,520 --> 00:09:57,030 And in the next tutorial we're going to actually continue building our fourth Android application. 149 00:09:57,210 --> 00:09:57,960 OK. 150 00:09:57,960 --> 00:09:59,180 So thanks for watching. 151 00:09:59,220 --> 00:10:04,560 And if you have any questions please post the discussion in the course and then I'll do my best to answer 152 00:10:04,560 --> 00:10:05,510 your questions. 153 00:10:05,700 --> 00:10:09,610 Thank you for watching and I'll see you in the next tutorial.