1 00:00:00,990 --> 00:00:04,930 So as you can see here my object is now created. 2 00:00:05,070 --> 00:00:09,400 So now I want to actually get the value of this instance valuable. 3 00:00:09,570 --> 00:00:11,370 My fourth dark object. 4 00:00:11,370 --> 00:00:14,600 So and then I had to actually output that value to the concert. 5 00:00:14,610 --> 00:00:20,610 So I just need to type in here a system that out does princeling. 6 00:00:21,020 --> 00:00:29,790 And then inside the prentices I referred to the name of my object my fourth dark thought get speed and 7 00:00:29,790 --> 00:00:33,530 then I need to put in a semi-colon at the end of my statement. 8 00:00:33,780 --> 00:00:40,680 So now if I run my project as you can see this is the value that is output to the console. 9 00:00:40,680 --> 00:00:41,230 OK. 10 00:00:41,400 --> 00:00:48,820 So this value as you can see here is the return value of this method here gets speed. 11 00:00:48,900 --> 00:00:56,850 OK the value of this split instance variable is 70 OK but inside take it speed Mefford are you multiplied 12 00:00:57,120 --> 00:00:58,570 that value by two. 13 00:00:58,770 --> 00:01:02,940 And then I assigned that value to spit instance variable. 14 00:01:02,940 --> 00:01:03,710 OK. 15 00:01:04,110 --> 00:01:07,850 And then in line 11 I returned that value OK. 16 00:01:07,890 --> 00:01:16,080 And as you can see here inside the console this is that value OK so 70 multiplied by two is one hundred 17 00:01:16,080 --> 00:01:16,680 and forty. 18 00:01:16,680 --> 00:01:19,580 This value is the returned value of the Smurfit. 19 00:01:19,590 --> 00:01:20,010 OK. 20 00:01:20,040 --> 00:01:26,670 So now let me actually show you another important point about these instance variables and these kids 21 00:01:26,690 --> 00:01:27,150 here my friend. 22 00:01:27,150 --> 00:01:27,680 OK. 23 00:01:27,780 --> 00:01:33,390 So first let me actually change the access modifier of this instance variable to public. 24 00:01:33,540 --> 00:01:39,740 And then inside the main method or you want to access the value of this instance variable directly. 25 00:01:39,740 --> 00:01:40,160 OK. 26 00:01:40,230 --> 00:01:48,120 So I just need to type in here system that out that princeling and then inside Apprentice's I just need 27 00:01:48,120 --> 00:01:56,430 to refer to the name of my object my fourth dog that speed and then I need to put in a semi-colon at 28 00:01:56,430 --> 00:01:58,160 the end of my statement. 29 00:01:58,170 --> 00:02:05,020 So now if I had on my project as you can see the value of this instance variable is actually changed. 30 00:02:05,120 --> 00:02:05,830 OK. 31 00:02:06,200 --> 00:02:12,310 That this value is the value of this instance variable of this my fourth dog object. 32 00:02:12,360 --> 00:02:20,700 OK you may ask that why this value is changed because inside get her my fed I multiplied that value 33 00:02:20,700 --> 00:02:24,410 by two and then I assign that value to this instance variable. 34 00:02:24,480 --> 00:02:28,050 So the value of this instance variable is now changed. 35 00:02:28,070 --> 00:02:28,580 OK. 36 00:02:28,710 --> 00:02:31,450 In line 11 I returned that value. 37 00:02:31,470 --> 00:02:32,060 OK. 38 00:02:32,070 --> 00:02:37,780 So that may actually change this to private. 39 00:02:37,860 --> 00:02:45,450 OK so now I want to actually create a set for my fed for my speed. 40 00:02:45,480 --> 00:02:46,590 Instance here. 41 00:02:46,710 --> 00:02:52,340 So again the access modifier of my set and my Fed is public. 42 00:02:53,290 --> 00:02:54,150 OK. 43 00:02:54,510 --> 00:03:01,690 And the return type of this method is Voyt and the name of this method is set speed. 44 00:03:02,180 --> 00:03:02,910 OK. 45 00:03:03,180 --> 00:03:05,930 And then I need to put in a pair of round brackets here. 46 00:03:06,330 --> 00:03:12,470 And inside the practices I want to specify that this method is going to accept an argument. 47 00:03:12,480 --> 00:03:13,200 OK. 48 00:03:13,440 --> 00:03:19,540 So the data type of my argument is it and the name of my argument is for example value. 49 00:03:19,560 --> 00:03:20,300 OK. 50 00:03:20,710 --> 00:03:26,160 And I want to open and close my method by using these curly braces so I insert the Smurfette. 51 00:03:26,190 --> 00:03:33,390 I can actually do some changes with the value of the argument and then I can set that value to my speed 52 00:03:33,390 --> 00:03:34,700 instance variable. 53 00:03:35,010 --> 00:03:36,540 So let's see how we can do that. 54 00:03:36,540 --> 00:03:44,100 First of all I need to refer to the name of my argument value and then I put an assignment operator 55 00:03:44,100 --> 00:03:44,780 here. 56 00:03:45,330 --> 00:03:55,820 And then again I refer to the name of my argument value plus five as you can see here I changed the 57 00:03:55,820 --> 00:04:03,230 value of the argument here and I added 5 values to the value of my argument. 58 00:04:03,230 --> 00:04:03,820 OK. 59 00:04:03,860 --> 00:04:07,870 And then I assigned that value to this argument. 60 00:04:07,940 --> 00:04:08,720 OK. 61 00:04:09,200 --> 00:04:17,450 So now I can actually refer to the name of my speed instance variable and then I put an assignment operator 62 00:04:17,450 --> 00:04:18,140 here. 63 00:04:18,570 --> 00:04:20,840 And then I refer to the name of my argument. 64 00:04:20,840 --> 00:04:28,310 So inside the main class here I want to actually set another value to that speed instance variable. 65 00:04:28,340 --> 00:04:35,240 So first of all I need to refer to the name of my object my fourth dog that set speed. 66 00:04:35,330 --> 00:04:38,240 So now I need to pass a value to this method. 67 00:04:38,390 --> 00:04:39,030 OK. 68 00:04:39,380 --> 00:04:42,230 So for example Number 10. 69 00:04:42,640 --> 00:04:43,650 OK. 70 00:04:44,120 --> 00:04:51,240 And now I want to actually output the value of this instance variable to the console. 71 00:04:51,410 --> 00:04:57,710 So I just need to type in here system that out that princeling. 72 00:04:58,470 --> 00:05:04,050 And then inside the prentices I need to refer to the name of my object and then I want to access the 73 00:05:04,050 --> 00:05:08,460 value of this instance variable by using that term of it. 74 00:05:08,540 --> 00:05:16,500 So I get speed and then I need to put a semicolon after my statement. 75 00:05:16,500 --> 00:05:23,050 So now if I get on my project as you can see this is the value that is output to the console. 76 00:05:23,160 --> 00:05:29,210 OK so now let me actually comment out this line of code here and let's run our project again. 77 00:05:29,400 --> 00:05:30,130 As you can see. 78 00:05:30,300 --> 00:05:34,610 So first of all the past number ten is set speed Meffert. 79 00:05:34,740 --> 00:05:36,580 OK so inside that class. 80 00:05:36,600 --> 00:05:43,680 So as you can see here inside this set speed method I specified that are you want to add five values 81 00:05:43,920 --> 00:05:45,680 to the value of the argument. 82 00:05:45,690 --> 00:05:46,090 OK. 83 00:05:46,110 --> 00:05:49,600 And then I assign that value to that argument. 84 00:05:49,740 --> 00:05:56,280 And then in line 15 I assign the value of that argument to that speed instance value. 85 00:05:56,280 --> 00:06:03,530 OK so now that I actually passed the number 10 to the Smurfette number 10 plus 5 is 15. 86 00:06:03,560 --> 00:06:07,910 OK so now the value of this instance variable is 15. 87 00:06:08,200 --> 00:06:18,150 OK but in line 48 inside the main class and inside the main method I decided to output that value to 88 00:06:18,150 --> 00:06:18,740 the console. 89 00:06:18,780 --> 00:06:25,950 So I deferred the name of my object and then I used this dot notation here and then I actually tried 90 00:06:26,040 --> 00:06:31,330 to access the value of this instance variable by using this good speed method. 91 00:06:31,350 --> 00:06:34,020 OK so now let's go inside the get speed method. 92 00:06:34,230 --> 00:06:37,210 So as you can see here this is our good speed method. 93 00:06:37,590 --> 00:06:41,770 So the value of the speed instance variable is 15. 94 00:06:41,870 --> 00:06:46,350 OK so 15 multiplied by 2 is 40. 95 00:06:46,350 --> 00:06:50,030 So the value of this instance variable is now 50. 96 00:06:50,250 --> 00:06:53,010 And then in line 11 I returned. 97 00:06:53,040 --> 00:06:54,020 That's right you. 98 00:06:54,150 --> 00:06:57,890 So the value of this instance variable is now 40. 99 00:06:58,140 --> 00:07:04,090 So as you can see here inside the console this is the value of our speed instance variable. 100 00:07:04,260 --> 00:07:04,750 OK. 101 00:07:04,800 --> 00:07:08,060 So I think that's enough for this tutorial. 102 00:07:08,310 --> 00:07:10,040 And in the next tutorial. 103 00:07:10,070 --> 00:07:17,390 And when I talk about class variables and how we can use the class methods in our Java codes. 104 00:07:17,430 --> 00:07:17,820 OK. 105 00:07:17,850 --> 00:07:19,570 So thank you very much for watching. 106 00:07:19,830 --> 00:07:25,350 And if you have any questions please post the discussion in the course and then I'll try my best to 107 00:07:25,350 --> 00:07:26,790 answer your questions.