1 00:00:00,480 --> 00:00:01,430 OK everyone. 2 00:00:01,440 --> 00:00:08,100 Now let's actually go back inside this main activity double file here and now we're going to actually 3 00:00:08,100 --> 00:00:09,560 put some lines of code here. 4 00:00:09,570 --> 00:00:10,120 OK. 5 00:00:10,260 --> 00:00:10,770 OK. 6 00:00:10,770 --> 00:00:16,910 Now we want to actually output the value that is inside of the index 5 of this away. 7 00:00:16,920 --> 00:00:22,880 So this is the index zero index one index to index free index for. 8 00:00:23,010 --> 00:00:24,360 And this is index 5. 9 00:00:24,360 --> 00:00:24,990 OK. 10 00:00:25,140 --> 00:00:28,950 So now here again just putting this line of code here. 11 00:00:29,010 --> 00:00:35,730 So as you can see here TXI the original element that's a text string add a sub in the ex-wife. 12 00:00:35,730 --> 00:00:36,190 OK. 13 00:00:36,300 --> 00:00:41,040 So this piece of code here is going to actually give me the value that is inside of the index. 14 00:00:41,040 --> 00:00:44,700 Five of these screen Arey here as you can see. 15 00:00:44,760 --> 00:00:46,980 So another section is on our project. 16 00:00:46,980 --> 00:00:47,520 OK. 17 00:00:47,550 --> 00:00:51,330 Now as you can see here our application is running on this emulator. 18 00:00:51,480 --> 00:00:57,630 So here if we actually scroll down the screen here you can see this value here. 19 00:00:57,630 --> 00:00:58,090 OK. 20 00:00:58,200 --> 00:00:59,590 If the letter if. 21 00:00:59,640 --> 00:01:00,060 OK. 22 00:01:00,090 --> 00:01:03,660 What do you do not add every element value is dollar sign. 23 00:01:03,720 --> 00:01:04,180 OK. 24 00:01:04,320 --> 00:01:11,040 So here because we actually modified the Auret devalues that is actually the inside of the ARII here 25 00:01:11,160 --> 00:01:17,030 in line 40 as you can see here we actually called these Let's modify the array method here. 26 00:01:17,370 --> 00:01:23,790 So because we modified the values that are actually inside of this are we now the leader if is actually 27 00:01:23,790 --> 00:01:26,730 preceded by actually a dollar sign here. 28 00:01:26,810 --> 00:01:34,080 OK so now let's let's actually go back and say this main activity that job fight here and here I want 29 00:01:34,080 --> 00:01:39,690 to actually manipulate a specific element that is actually inside of these three elements. 30 00:01:39,690 --> 00:01:40,170 OK. 31 00:01:40,320 --> 00:01:43,060 So let's actually create a method for that job. 32 00:01:43,140 --> 00:01:43,730 OK. 33 00:01:43,980 --> 00:01:49,840 So again the access modifier of if it is public the return type of RMF it is void. 34 00:01:49,920 --> 00:01:53,300 So this means that RMF it is going to actually return nothing. 35 00:01:53,520 --> 00:01:54,000 OK. 36 00:01:54,150 --> 00:02:01,790 And the name of RMI if it is let's modify element OK. 37 00:02:01,900 --> 00:02:08,410 And here inside of the practice's I need to actually specify an argument for the Smurfit so that the 38 00:02:08,410 --> 00:02:10,720 data type of argument is strange. 39 00:02:10,930 --> 00:02:11,510 OK. 40 00:02:11,770 --> 00:02:14,760 And the name of our argument is element. 41 00:02:15,480 --> 00:02:16,060 OK. 42 00:02:16,240 --> 00:02:21,880 And then I need to actually open and close this method by using these curly braces and inside this method 43 00:02:21,930 --> 00:02:27,970 I want to actually manipulate these element values so I just need to refer to the name of this element 44 00:02:28,380 --> 00:02:29,130 argument. 45 00:02:29,140 --> 00:02:29,560 OK. 46 00:02:29,650 --> 00:02:36,540 Assignment operator and here inside the double quotes I can just type in and sign hash tag. 47 00:02:36,780 --> 00:02:37,280 OK. 48 00:02:37,330 --> 00:02:39,350 Plus element. 49 00:02:39,730 --> 00:02:45,580 OK so as you can see here I actually put this value here inside of these table codes here before this 50 00:02:45,640 --> 00:02:46,550 element here. 51 00:02:46,570 --> 00:02:46,950 OK. 52 00:02:47,020 --> 00:02:55,150 Before this element of argument and now I can actually output this value the element value to this screen. 53 00:02:55,150 --> 00:02:58,040 OK so I can't just type anti-X the. 54 00:02:58,060 --> 00:03:06,340 So as you can see here I want to refer to one of these objects here as you can see to the modified array 55 00:03:06,340 --> 00:03:06,860 element. 56 00:03:06,880 --> 00:03:07,480 OK. 57 00:03:07,690 --> 00:03:13,630 And as you can see here inside of these let's modify elements I cannot refer to this object. 58 00:03:13,630 --> 00:03:21,100 OK because this object this to this takes view is actually it created inside of these uncreate Smurfit. 59 00:03:21,190 --> 00:03:21,660 OK. 60 00:03:21,790 --> 00:03:29,420 And we cannot actually refer to a valuable to add to an object that is actually created in another method. 61 00:03:29,470 --> 00:03:38,230 So here I can just declare this object so I can just copy this takes beauty actually modify every element 62 00:03:38,230 --> 00:03:44,590 here and then I can just put it inside of this class and then I need to put in a semicolon here. 63 00:03:44,800 --> 00:03:45,280 OK. 64 00:03:45,340 --> 00:03:48,020 And then I can just delete this takes you here. 65 00:03:48,310 --> 00:03:48,550 OK. 66 00:03:48,580 --> 00:03:55,840 In this way we declared this takes you inside of this class and here inside of this uncreate method 67 00:03:55,840 --> 00:03:58,660 you are actually instantiating this object. 68 00:03:58,690 --> 00:03:59,450 OK. 69 00:03:59,460 --> 00:04:01,390 TXI the modified array element. 70 00:04:01,520 --> 00:04:09,410 And now inside of this let's modify elements I can totally fair to that object as you can see here takes 71 00:04:09,520 --> 00:04:11,500 the modify R8 element. 72 00:04:11,530 --> 00:04:13,690 So let's actually test and see what happens. 73 00:04:13,690 --> 00:04:17,990 Let's modify three elements so I can refer to the name of the text you now. 74 00:04:18,030 --> 00:04:18,530 OK. 75 00:04:18,610 --> 00:04:22,780 That said text element. 76 00:04:22,780 --> 00:04:26,590 And now let's actually call this method here. 77 00:04:26,800 --> 00:04:30,440 Let's modify element. 78 00:04:30,460 --> 00:04:35,510 So now I need to actually provide a value as an argument for this method. 79 00:04:35,530 --> 00:04:35,970 OK. 80 00:04:36,130 --> 00:04:40,070 So as you can see the data type of my argument is strange. 81 00:04:40,180 --> 00:04:43,100 OK so I need to actually provide a value of types 3. 82 00:04:43,240 --> 00:04:47,740 So here I can just refer to the name of this thing a sub index. 83 00:04:47,790 --> 00:04:51,420 OK so in this way I can actually get this value. 84 00:04:51,430 --> 00:04:52,270 OK. 85 00:04:52,580 --> 00:04:55,800 The value that is inside of the index five of this. 86 00:04:56,020 --> 00:04:59,190 So as you can see this value if a newline character. 87 00:04:59,200 --> 00:04:59,760 OK. 88 00:05:00,130 --> 00:05:02,850 And here I can just put it here. 89 00:05:02,900 --> 00:05:06,040 String already sup in the. 90 00:05:06,250 --> 00:05:06,860 OK. 91 00:05:07,060 --> 00:05:10,990 So let's actually run our project and see what happens. 92 00:05:10,990 --> 00:05:15,530 So now as you can see our application is actually running on this emulator. 93 00:05:15,760 --> 00:05:22,300 And here if we actually scroll down the screen here I want to actually see this value here a modified 94 00:05:22,420 --> 00:05:23,770 array element at sign. 95 00:05:23,770 --> 00:05:25,790 Hash tag dollar sign. 96 00:05:26,020 --> 00:05:32,850 OK so now I want to actually output the value of every element after modification. 97 00:05:33,010 --> 00:05:33,630 OK. 98 00:05:33,760 --> 00:05:39,280 So after the modified added element as you can see this is this area is now for example modified. 99 00:05:39,280 --> 00:05:46,900 OK so now again I want to output the original value that is inside of the index five of these three. 100 00:05:46,970 --> 00:05:48,560 OK staring at it. 101 00:05:48,580 --> 00:05:50,240 So let's see what happens. 102 00:05:50,440 --> 00:05:52,480 And here after this line of code here. 103 00:05:52,660 --> 00:05:57,280 So just type in here takes the element after the modification. 104 00:05:57,660 --> 00:06:08,960 OK that said text string and a sup in the ex-wife and now it's actually an art project and see what 105 00:06:08,960 --> 00:06:09,530 happens. 106 00:06:09,590 --> 00:06:12,850 So now our application is actually running on this emulator. 107 00:06:12,860 --> 00:06:17,790 And now if we actually scroll down the screen here let's see what happens. 108 00:06:17,810 --> 00:06:23,760 So as you can see here value of the element after modification is dollar sign F.. 109 00:06:24,020 --> 00:06:31,940 OK so the most important point I want you to actually know is that when ever we actually modify the 110 00:06:31,940 --> 00:06:39,320 values that are actually inside of an array as we did in line 42 Let's modify the error here elements 111 00:06:39,320 --> 00:06:43,510 that are actually inside of that array are going to be modified ok forever. 112 00:06:43,730 --> 00:06:44,360 OK. 113 00:06:44,600 --> 00:06:51,350 Because when we actually create an array you are actually creating a reference to some objects to some 114 00:06:51,350 --> 00:06:52,730 value inside of the memory. 115 00:06:52,730 --> 00:06:53,130 OK. 116 00:06:53,180 --> 00:06:59,270 And when we modify that array the values that are actually inside of that are they are going to be modified 117 00:06:59,270 --> 00:06:59,690 too. 118 00:06:59,750 --> 00:07:00,260 OK. 119 00:07:00,500 --> 00:07:08,160 But when we actually modify a specific element that is actually inside of an array as we did here. 120 00:07:08,320 --> 00:07:08,770 OK. 121 00:07:08,870 --> 00:07:10,850 Let's modify element OK. 122 00:07:11,060 --> 00:07:15,720 Only a copy of that modified element is going to be created. 123 00:07:16,090 --> 00:07:16,600 OK. 124 00:07:16,760 --> 00:07:20,040 And then that value as you can see on this emulator here. 125 00:07:20,230 --> 00:07:22,800 This is that why you sign hash tag dollar sign. 126 00:07:22,820 --> 00:07:23,440 OK. 127 00:07:23,660 --> 00:07:26,180 But the original value is not changed. 128 00:07:26,180 --> 00:07:31,470 OK because we only modified our specific elements that is actually inside of that of that array. 129 00:07:31,490 --> 00:07:32,030 OK. 130 00:07:32,060 --> 00:07:37,240 And as you can see here value of array element after the modification is dollar sign. 131 00:07:37,550 --> 00:07:43,750 So then if we actually create an array we are actually creating a reference to that Ari. 132 00:07:43,850 --> 00:07:48,520 So that's why the values that are actually inside of this are actually modified. 133 00:07:48,560 --> 00:07:49,040 OK. 134 00:07:49,220 --> 00:07:54,450 So hopefully that makes sense and I think that's enough for this tutorial. 135 00:07:54,920 --> 00:08:00,440 And if you have any questions please post the discussion in the course and I'll do my best to answer 136 00:08:00,440 --> 00:08:01,330 your questions. 137 00:08:01,420 --> 00:08:05,800 And thank you very much for watching and I'll see you in the next tutorial.