1 00:00:00,450 --> 00:00:07,500 So as you can see here these are the lines of code that I pasted here inside this Anchal each method. 2 00:00:07,530 --> 00:00:14,780 So here in line number 100 I created a variable of type integer and the name of this variable is computed 3 00:00:14,780 --> 00:00:17,440 of power integer value. 4 00:00:17,550 --> 00:00:18,350 Right. 5 00:00:18,390 --> 00:00:24,720 So let's actually go inside this computer class as you can see inside this file computer the java file 6 00:00:24,720 --> 00:00:27,980 as you can see we have this instance variables right. 7 00:00:28,200 --> 00:00:34,260 But as you can see here we have free instance variables that are of type integer. 8 00:00:34,260 --> 00:00:35,070 Right. 9 00:00:35,070 --> 00:00:37,380 So let's go back to our main activity class. 10 00:00:37,470 --> 00:00:43,860 So here as you can see I created this variable which is of type integer here so that we can actually 11 00:00:45,180 --> 00:00:53,550 hold the value of this computer power which is going to be streamed inside these variable. 12 00:00:53,550 --> 00:00:57,030 So it computer power integer value. 13 00:00:57,120 --> 00:00:57,660 Right. 14 00:00:57,660 --> 00:00:59,620 Assignment operator operator zero. 15 00:00:59,700 --> 00:01:05,180 So initially I assigned the value zero to this valuable in line number one hundred and one. 16 00:01:05,280 --> 00:01:11,430 We created another variable which is again an integer and the name of this value but is computer speed 17 00:01:11,460 --> 00:01:17,410 integer value assignment operator 0 and inline number of 100 and 2. 18 00:01:17,580 --> 00:01:23,010 As you can see here we have another variable which is again of type integer and the name of this rowdier 19 00:01:23,030 --> 00:01:27,370 but is computerdom integer value assignment operator 0. 20 00:01:27,630 --> 00:01:35,820 So because these variables are of type integer we created them so that they can actually hold these 21 00:01:35,820 --> 00:01:36,860 integer values. 22 00:01:36,870 --> 00:01:43,590 So if I go inside this computer class as you can see here we have these instance variables that are 23 00:01:43,590 --> 00:01:44,520 of type integer. 24 00:01:44,670 --> 00:01:47,870 So insight is Anklage method inside the main activity class. 25 00:01:47,970 --> 00:01:55,710 We created these variables in horde in order to actually hold the the integer value of our computer 26 00:01:55,710 --> 00:01:56,380 power. 27 00:01:56,550 --> 00:01:57,140 Right. 28 00:01:57,240 --> 00:02:01,930 So now we need to actually convert our string value to an integer value. 29 00:02:01,950 --> 00:02:03,440 So let's see how we can do that. 30 00:02:03,450 --> 00:02:08,670 First let me just pasting some lines of code here and then it will make sense. 31 00:02:08,670 --> 00:02:13,230 So as you can see here these are the lines of code that I pasted here. 32 00:02:13,410 --> 00:02:15,930 So we have a try catch block here. 33 00:02:15,990 --> 00:02:16,770 Right. 34 00:02:16,770 --> 00:02:19,810 So let's actually look at this tree block here. 35 00:02:19,920 --> 00:02:24,570 So try and inside the curly braces of these tribal Arch we have this line of code here. 36 00:02:24,900 --> 00:02:32,750 So here I am referring to this valuable computer power integer value assignment operator here. 37 00:02:33,210 --> 00:02:38,330 And then I am referring to the name of this integer class that parse it. 38 00:02:38,340 --> 00:02:40,980 So what does this parse method do this. 39 00:02:40,980 --> 00:02:47,580 If it is going to actually convert a value that is of types 3 to an integer value but it doesn't mean 40 00:02:47,640 --> 00:02:54,850 that if you actually for example pass the value hello to this method it's not going to actually convert 41 00:02:54,900 --> 00:02:57,550 that hello to the to an integer value. 42 00:02:57,720 --> 00:02:58,380 It's just going on. 43 00:02:58,380 --> 00:03:06,980 For example if you pass for example Number 25 to an it takes as you can see here in line number 94. 44 00:03:07,140 --> 00:03:09,170 We have this variable which is of type string. 45 00:03:09,180 --> 00:03:09,500 Right. 46 00:03:09,510 --> 00:03:13,840 And the name of this value is computer power assignment operator. 47 00:03:13,860 --> 00:03:17,220 So here I am referring to the EDT computer power. 48 00:03:17,370 --> 00:03:24,510 So now let me show you the emulator here as I can see this is our emulator and this is our ADC computer 49 00:03:24,510 --> 00:03:25,560 power right. 50 00:03:25,600 --> 00:03:31,560 The user is supposed to actually enter an integer value here. 51 00:03:31,560 --> 00:03:33,640 For example number 23 right. 52 00:03:33,690 --> 00:03:40,500 But if the user enters For example a value that is not an integer for example hello then it's not going 53 00:03:40,500 --> 00:03:43,840 to actually convert this value to an integer value. 54 00:03:43,920 --> 00:03:45,320 It's going to run an error. 55 00:03:45,330 --> 00:03:45,840 Right. 56 00:03:46,050 --> 00:03:51,150 So that's why we actually put this line of code here inside a try block. 57 00:03:51,600 --> 00:03:54,440 And we have also this catch block here. 58 00:03:54,660 --> 00:03:58,210 In order to catch any errors that may occur here. 59 00:03:58,230 --> 00:04:04,430 So for example the user is supposed to actually enter an integer value here for the computer power. 60 00:04:04,560 --> 00:04:09,030 But what happens if the user for example enters the value Hello. 61 00:04:09,300 --> 00:04:12,660 In that case we have an error and it's going to throw an error. 62 00:04:12,780 --> 00:04:17,570 And if we don't get that error our application is going to crash. 63 00:04:17,670 --> 00:04:18,070 Right. 64 00:04:18,120 --> 00:04:19,940 And we don't want that to happen. 65 00:04:19,950 --> 00:04:21,680 We don't want our application to crash. 66 00:04:21,810 --> 00:04:25,440 So we should actually just catch those errors. 67 00:04:25,620 --> 00:04:29,530 So that's why I actually created this try catch block here. 68 00:04:29,610 --> 00:04:34,220 So any time that you may actually expect something to go run. 69 00:04:34,380 --> 00:04:41,760 Make sure to put your own codes inside a truck try church block so that they can actually get those 70 00:04:41,850 --> 00:04:43,830 errors in say the catch block. 71 00:04:43,980 --> 00:04:44,910 Right. 72 00:04:44,910 --> 00:04:47,110 Look at this block I've got here. 73 00:04:47,110 --> 00:04:50,460 Try computer power assignment operator. 74 00:04:50,490 --> 00:04:55,980 So here I am referring to this integer class right integer that parse it. 75 00:04:56,280 --> 00:05:02,240 So again let me tell you that this parts ain't gonna actually convert a value that is of types three 76 00:05:02,460 --> 00:05:03,360 integer value. 77 00:05:03,360 --> 00:05:09,840 Right but for example if I if I here enter the value of 100 here this is going to be an integer value 78 00:05:09,840 --> 00:05:10,260 right. 79 00:05:10,350 --> 00:05:14,170 But here we put this integer value inside these Eadie text. 80 00:05:14,220 --> 00:05:15,010 Right. 81 00:05:15,090 --> 00:05:18,280 And it it takes can only accept a string value. 82 00:05:18,300 --> 00:05:25,520 So it's going actually to convert that value to our street you and we can actually put it here right. 83 00:05:25,620 --> 00:05:28,670 And then we are actually saying that get picks that twisted in. 84 00:05:28,680 --> 00:05:33,900 So it's going to convert that value to run twice think value and it's going to assign that string value 85 00:05:33,900 --> 00:05:35,260 to these computer power. 86 00:05:35,460 --> 00:05:38,830 So this 100 here now is our string value right. 87 00:05:39,030 --> 00:05:41,820 But if we want an integer value. 88 00:05:41,940 --> 00:05:43,610 So here inside is Triple H. 89 00:05:43,740 --> 00:05:45,210 We are converting. 90 00:05:45,300 --> 00:05:50,760 We are saying that convert that integer value to that string value to an integer value. 91 00:05:50,760 --> 00:05:55,490 Here we are saying that converts that string value computer power to an integer value. 92 00:05:55,530 --> 00:06:00,330 So integer parsing computer power that's here right. 93 00:06:00,330 --> 00:06:06,300 So it's going to convert the value of 120 integer value not and not passing value about an integer value 94 00:06:06,660 --> 00:06:13,070 and it's going to assign that integer value to this computer power integer value valuable. 95 00:06:13,350 --> 00:06:13,870 Right. 96 00:06:14,100 --> 00:06:17,100 So if you have this try catch block for disvalue. 97 00:06:17,460 --> 00:06:20,430 So now we have two other variables here. 98 00:06:20,460 --> 00:06:23,630 As you can see this one computer spit integer value. 99 00:06:23,640 --> 00:06:28,500 So let's actually create a try catch block for this one computer with integer value. 100 00:06:28,500 --> 00:06:30,710 And here I can say try. 101 00:06:31,170 --> 00:06:35,010 And then I can open and close describe like by using these curly braces. 102 00:06:35,010 --> 00:06:42,600 And we also must provide a check or catch block so catch and inside the prentices again to say exception 103 00:06:43,410 --> 00:06:45,970 and the name of this argument is going to be. 104 00:06:46,420 --> 00:06:50,660 And here I can open and close this catch block by using these curly braces. 105 00:06:50,820 --> 00:06:57,060 So in this way we can actually write our coats inside this Triple H and inside the catch block we can 106 00:06:57,060 --> 00:06:58,720 catch those errors. 107 00:06:59,010 --> 00:07:05,240 And in that case our application is not going to crash because we already caught the errors right. 108 00:07:05,280 --> 00:07:14,370 So in say the Triple H I can say Computer computer speed integer value assignment operator and that 109 00:07:14,520 --> 00:07:19,970 refers to the name of this class Integer class that parts Int. 110 00:07:20,100 --> 00:07:25,040 And here I can easily refer to the name of this valuable computer speed. 111 00:07:25,080 --> 00:07:32,490 So here inside the prentices I can pass disvalue computer speed and then I need to put a semicolon at 112 00:07:32,490 --> 00:07:33,600 the end of my statement. 113 00:07:33,750 --> 00:07:39,810 And inside these catch block again just like does this error to the console. 114 00:07:39,810 --> 00:07:47,070 So here I can say larg that I first I need to specify the tag which is going to be all of types think. 115 00:07:47,260 --> 00:07:50,420 And here I can say the I am referring to these arguments right. 116 00:07:50,430 --> 00:07:54,790 This argument actually holds the actual error description. 117 00:07:54,790 --> 00:08:02,520 So for example dot get localized message or get a message and then put a semicolon at the end of your 118 00:08:02,520 --> 00:08:03,770 statement. 119 00:08:04,110 --> 00:08:09,160 So they provided a try catch block for this valuable computer spit into the value. 120 00:08:09,160 --> 00:08:13,400 And now let's actually create another try catch block for our. 121 00:08:13,450 --> 00:08:18,590 Another variable which is just one computer rammy integer values so try. 122 00:08:18,910 --> 00:08:21,770 And here I need to provide a catch block. 123 00:08:22,110 --> 00:08:27,710 So now exception inside Apprentice's just put the value exception E.. 124 00:08:28,260 --> 00:08:31,470 And then open and close your cataplexy by using curly braces. 125 00:08:31,470 --> 00:08:37,770 And inside is trouble like I can't say the name of what a variable is computer integer value computer 126 00:08:39,350 --> 00:08:43,360 ram integer value assignment operator. 127 00:08:43,410 --> 00:08:47,640 And here I can say integer dot parts in it. 128 00:08:48,180 --> 00:08:54,610 And here I can pass these valuable as you can see here Computerland which is strange. 129 00:08:54,690 --> 00:08:58,650 So here I can see inside the Prentice's computer 130 00:09:01,910 --> 00:09:03,200 RAM. 131 00:09:03,850 --> 00:09:08,740 And then I need to put a semicolon at the end of my statement and in say the catch block I can catch 132 00:09:08,740 --> 00:09:11,800 that error and just put it in the console. 133 00:09:11,800 --> 00:09:16,420 So like that by first I need to specify the task. 134 00:09:16,570 --> 00:09:24,830 And here I can see the dot get message and then I need to put a semicolon at the end of my statement. 135 00:09:25,390 --> 00:09:27,610 So hopefully that makes sense.