1 00:00:00,690 --> 00:00:06,650 First of all you referred to twice already to a pre-defined class card system in Java. 2 00:00:06,710 --> 00:00:09,790 OK system that are a copy. 3 00:00:10,050 --> 00:00:11,390 OK. 4 00:00:11,400 --> 00:00:17,630 So this Smurfit actually is going to copy another array. 5 00:00:17,840 --> 00:00:18,520 OK. 6 00:00:18,960 --> 00:00:24,870 And we can see now I'm going I should explain how this method actually works. 7 00:00:24,870 --> 00:00:25,570 OK. 8 00:00:25,770 --> 00:00:32,620 The first argument as you can see here this is the first argument to k in teacher at a one OK. 9 00:00:32,970 --> 00:00:35,800 So this first argument is the source. 10 00:00:35,910 --> 00:00:36,450 OK. 11 00:00:36,690 --> 00:00:37,920 So this is our source OK. 12 00:00:38,040 --> 00:00:40,140 This is the area that we want to actually copy. 13 00:00:40,310 --> 00:00:41,090 OK. 14 00:00:41,220 --> 00:00:48,290 The second argument as you can see here is this is this party in position in the source. 15 00:00:48,400 --> 00:00:53,790 OK so this argument here number zero is this starting position. 16 00:00:53,820 --> 00:00:56,700 Ok for example this number 100 here. 17 00:00:56,750 --> 00:00:57,150 OK. 18 00:00:57,270 --> 00:01:00,370 Is this starting position in the source at a. 19 00:01:00,440 --> 00:01:01,730 OK. 20 00:01:01,830 --> 00:01:09,640 And this and this up first argument as you can see here is the destination in which we copy. 21 00:01:09,870 --> 00:01:14,050 OK which is the same as the source in that case. 22 00:01:14,190 --> 00:01:14,680 OK. 23 00:01:14,820 --> 00:01:16,600 As you can see here this is the this. 24 00:01:16,730 --> 00:01:20,590 This is actually the situation if you want to actually copy. 25 00:01:21,160 --> 00:01:22,370 OK. 26 00:01:22,680 --> 00:01:29,880 And this fourth argument as you can see here this number is zero as you can see this is the starting 27 00:01:29,880 --> 00:01:31,970 position in the destination data. 28 00:01:32,240 --> 00:01:35,560 Ok this is our destination data here. 29 00:01:35,760 --> 00:01:38,160 And this is the starting position into this initial data. 30 00:01:38,160 --> 00:01:39,230 Okay. 31 00:01:39,480 --> 00:01:45,990 And here as you can see this last argument here as you can see this final argument is actually the length 32 00:01:46,290 --> 00:01:48,360 of a value you want to copy. 33 00:01:48,360 --> 00:01:55,770 So here we want to actually create another copy of this Aure OK integer add a 1 and this is our copy 34 00:01:55,770 --> 00:01:56,240 integer. 35 00:01:56,330 --> 00:02:02,520 You want copy and discomfort are a copy here that we actually called on this system class as you can 36 00:02:02,520 --> 00:02:03,240 see. 37 00:02:03,350 --> 00:02:05,930 Dude that actually does that job for us. 38 00:02:05,940 --> 00:02:06,500 OK. 39 00:02:06,750 --> 00:02:09,130 So this first argument is the source. 40 00:02:09,180 --> 00:02:12,860 This is the starting position actually in the source Aure. 41 00:02:12,990 --> 00:02:18,300 As you can see here this is or this argument is the destination in which we copy. 42 00:02:18,390 --> 00:02:19,920 OK this is the destination. 43 00:02:20,100 --> 00:02:23,310 So this is our I know that this is indeed a copy. 44 00:02:23,340 --> 00:02:30,300 This is destination situation and this actually is a fourth argument actually is the starting position 45 00:02:30,300 --> 00:02:31,750 in the destination data. 46 00:02:32,560 --> 00:02:36,280 Ok this is this starting position in the destination data. 47 00:02:36,370 --> 00:02:37,500 OK. 48 00:02:38,050 --> 00:02:41,210 And here this is the line of values we want to copy. 49 00:02:41,260 --> 00:02:41,770 OK. 50 00:02:41,770 --> 00:02:46,370 So here in line 49 we want to capture the output this. 51 00:02:46,600 --> 00:02:48,450 These two arrows to the screen. 52 00:02:48,490 --> 00:02:48,840 OK. 53 00:02:48,880 --> 00:02:56,500 So in line 49 I actually called this method here and this actually accepts two arguments and the first 54 00:02:56,560 --> 00:02:58,430 argument is integer add a 1. 55 00:02:58,540 --> 00:02:59,000 OK. 56 00:02:59,110 --> 00:03:02,300 And the second argument is TXI the end of a 1. 57 00:03:02,380 --> 00:03:04,130 And here in line 50. 58 00:03:04,180 --> 00:03:06,650 Again I called this method here. 59 00:03:07,120 --> 00:03:12,860 Output the Aure to the screen integer at a World Cup he takes the end at a word copy. 60 00:03:12,900 --> 00:03:18,700 OK so now let's actually run our project and see what happens. 61 00:03:18,740 --> 00:03:27,440 OK so now as you can see our application is running on this emulator here and this is in a vault here 62 00:03:27,480 --> 00:03:32,050 as you can see so I can actually scroll to the left in order to see the other values. 63 00:03:32,370 --> 00:03:34,280 And this is in every one copy. 64 00:03:34,280 --> 00:03:34,590 OK. 65 00:03:34,590 --> 00:03:40,740 So as you can see here these values are actually the same as these values that are inside of this. 66 00:03:40,830 --> 00:03:42,490 Everyone here OK. 67 00:03:42,600 --> 00:03:45,030 So hopefully that makes sense. 68 00:03:45,360 --> 00:03:52,470 And now let's actually go back inside the main activity of a fight here and let's actually add some 69 00:03:52,620 --> 00:03:54,110 more lines of code here. 70 00:03:54,320 --> 00:03:54,610 OK. 71 00:03:54,640 --> 00:03:56,770 Say that this uncreate Mefford. 72 00:03:56,910 --> 00:04:02,730 So now I'm going to actually pasting some lines of code here and then I'm going to explain to you what's 73 00:04:02,730 --> 00:04:03,500 going on here. 74 00:04:03,510 --> 00:04:04,250 OK. 75 00:04:04,620 --> 00:04:09,770 So as you can see here these are the lines of code that are that I actually paste that here. 76 00:04:09,780 --> 00:04:15,140 First of all in line 54 I created all variable of type Boolean. 77 00:04:15,270 --> 00:04:15,800 OK. 78 00:04:15,960 --> 00:04:17,630 And the name of this variable is. 79 00:04:17,730 --> 00:04:18,700 Is it equal. 80 00:04:18,750 --> 00:04:19,490 OK. 81 00:04:19,920 --> 00:04:26,970 And then here as you can see I actually referred to the name of this phrase class dot equals. 82 00:04:27,150 --> 00:04:34,320 So this Mefford this equals Mivart actually checks of whether the values of two rays are actually the 83 00:04:34,320 --> 00:04:35,370 same or not. 84 00:04:35,370 --> 00:04:37,400 OK are equal or not. 85 00:04:37,410 --> 00:04:45,420 So we want to actually specify whether the values of these integer array 1 are actually equal to the 86 00:04:45,420 --> 00:04:49,320 values that are inside of this integer at one copy or not. 87 00:04:49,340 --> 00:04:58,760 OK so here I called this class I referred to the name of this class phrase that equals integer Arev 88 00:04:58,860 --> 00:05:00,930 on integer array one copy. 89 00:05:01,050 --> 00:05:01,810 OK. 90 00:05:02,310 --> 00:05:07,910 And then in line 55 I referred to the name of this object S-W to equal. 91 00:05:07,920 --> 00:05:14,680 So as you can see here we created this object in line 26 here of this object is actually of type switch. 92 00:05:14,790 --> 00:05:24,360 Ok so it's W.T. that said checked OK and here as you can see which cities are a piece of code here and 93 00:05:24,360 --> 00:05:30,170 here I referred inside the inside of the prentices I referred to the name of these boolean variable. 94 00:05:30,180 --> 00:05:30,670 OK. 95 00:05:30,760 --> 00:05:32,010 Is Equant. 96 00:05:32,060 --> 00:05:41,160 OK so here I am saying that if the value of these is equal variable is true OK then assign the value 97 00:05:41,160 --> 00:05:43,580 true to this set check the method. 98 00:05:43,700 --> 00:05:49,620 Otherwise if the value of this is equal variable is not true. 99 00:05:49,740 --> 00:05:50,530 So it is false. 100 00:05:50,550 --> 00:05:50,990 OK. 101 00:05:51,360 --> 00:05:59,330 If the value of this is equal value but is not true then assign the value false to this set checks method. 102 00:05:59,340 --> 00:05:59,580 OK. 103 00:05:59,580 --> 00:06:06,420 So this piece of code as you can see here this expression here actually returns a value of type Boolean. 104 00:06:06,420 --> 00:06:07,020 OK. 105 00:06:07,350 --> 00:06:12,270 So this piece of code Rutan's may be a false or a true value. 106 00:06:12,270 --> 00:06:12,950 OK. 107 00:06:13,290 --> 00:06:18,360 And here I am saying that if the value of this is equal value and is true. 108 00:06:18,730 --> 00:06:23,080 OK he had this piece of code written that are true or false value but value. 109 00:06:23,310 --> 00:06:26,410 And then it's going to assign that true or false value. 110 00:06:26,420 --> 00:06:28,150 This is equal value. 111 00:06:28,190 --> 00:06:28,780 OK. 112 00:06:28,980 --> 00:06:35,010 And here I am saying that if the value of this is equal value but is true then assign the value true 113 00:06:35,010 --> 00:06:36,500 to this said checked my faith. 114 00:06:36,520 --> 00:06:41,170 Otherwise assigned the value falls to this said checked method. 115 00:06:41,210 --> 00:06:48,350 OK if the value of this is equal value but is natural assign the value false to this set check Moffet. 116 00:06:48,720 --> 00:06:50,870 So hopefully it does make sense. 117 00:06:50,910 --> 00:07:00,060 And in 1956 as you can see here here I want to specify the text of my s w t equal object to k of this 118 00:07:00,390 --> 00:07:01,570 sweet object. 119 00:07:01,590 --> 00:07:05,140 So I just referred to the name to the name of this object. 120 00:07:05,200 --> 00:07:07,660 W.T. equal dot Septic's. 121 00:07:07,710 --> 00:07:08,380 OK. 122 00:07:08,610 --> 00:07:10,080 So here again as you can see. 123 00:07:10,140 --> 00:07:15,550 So here I am saying that if the value of this is equal variable true. 124 00:07:15,780 --> 00:07:22,490 OK if the value of this is equal boolean variable true is true then assign the value. 125 00:07:22,520 --> 00:07:28,320 This takes this distance as you can see inside of these double quotes here. 126 00:07:28,320 --> 00:07:31,300 Then assign this value to the set text here. 127 00:07:31,320 --> 00:07:31,980 As you can see here. 128 00:07:31,980 --> 00:07:32,370 OK. 129 00:07:32,480 --> 00:07:38,400 As scientists value to these set takes a Meffert that is related to this object OK the value of these 130 00:07:38,400 --> 00:07:39,970 arrows are equal. 131 00:07:40,080 --> 00:07:49,100 Otherwise if the value of this is called a boolean variable is not true then assign this value not equal. 132 00:07:49,260 --> 00:07:51,590 Ok this takes this string value. 133 00:07:51,810 --> 00:07:55,550 Then assign this string value to the set text method here. 134 00:07:55,700 --> 00:08:00,830 OK so now let's actually run our project and see what happens. 135 00:08:00,860 --> 00:08:06,180 OK so now as you can see our application is running on this emulator. 136 00:08:06,600 --> 00:08:12,330 And here we can see this text here that says the value the values of these arrays are equal. 137 00:08:12,360 --> 00:08:14,310 And this actually does. 138 00:08:14,330 --> 00:08:16,860 So each object as you can see here is actually the checked on. 139 00:08:16,960 --> 00:08:18,570 OK the value of this. 140 00:08:18,580 --> 00:08:24,330 So each object is actually you now but as you can see here the size of this takes is is actually Aledo 141 00:08:24,840 --> 00:08:25,570 small. 142 00:08:25,800 --> 00:08:29,190 So analysis actually to go back and say this content underline mean that example. 143 00:08:29,340 --> 00:08:37,260 And here I need to click on this clear cache here and now let's actually select this each object here 144 00:08:37,560 --> 00:08:41,440 and let's actually find the text size as attribute as it can see. 145 00:08:41,500 --> 00:08:48,390 This is the text size attribute and here are actually assigned the value for example 20 to this attribute 146 00:08:48,390 --> 00:08:48,960 here. 147 00:08:49,020 --> 00:08:51,680 And if I run my project again let's see what happens. 148 00:08:51,690 --> 00:08:57,780 And now as you can see our application is running on the simulator and we can see this value here the 149 00:08:57,780 --> 00:09:00,820 values of these arrays are equal. 150 00:09:00,870 --> 00:09:01,160 OK. 151 00:09:01,170 --> 00:09:04,980 And the value of this sweet object is actually true. 152 00:09:04,980 --> 00:09:05,490 OK. 153 00:09:05,730 --> 00:09:07,060 This is checked on. 154 00:09:07,140 --> 00:09:07,880 OK. 155 00:09:08,370 --> 00:09:12,990 And now let's actually go back and say this main activity the double file here that's actually a comment 156 00:09:13,050 --> 00:09:16,870 out this line of code here that does that actually. 157 00:09:17,150 --> 00:09:25,700 Copies this intuition at a one here and then it's actually a common line of code here and now let's 158 00:09:25,710 --> 00:09:28,620 actually on our project again and see what happens. 159 00:09:28,620 --> 00:09:35,040 So now as you can see our application is running on this emulator and we can see the values that are 160 00:09:35,040 --> 00:09:37,660 actually inside of these eight out of one copy. 161 00:09:37,710 --> 00:09:38,020 OK. 162 00:09:38,040 --> 00:09:39,800 These are zeroes here. 163 00:09:39,930 --> 00:09:41,490 And it says not equal. 164 00:09:41,490 --> 00:09:41,920 OK. 165 00:09:41,970 --> 00:09:46,360 And the value of the switch object as you can see is of OK. 166 00:09:46,950 --> 00:09:50,810 So hopefully that makes sense that's actually to go back and say this main activity that I will find 167 00:09:50,820 --> 00:09:57,900 here and let's add to the uncomment this line of code here and now I'm going to actually pasting some 168 00:09:57,900 --> 00:10:01,760 more lines of code here and then I'm going to explain to you what's going on here. 169 00:10:01,770 --> 00:10:02,230 OK.