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These are the user uploaded subtitles that are being translated: 1 1 00:00:01,225 --> 00:00:02,091 All right, so let's go ahead 2 2 00:00:02,091 --> 00:00:02,924 and move into Eclipse. 3 3 00:00:02,924 --> 00:00:05,442 Let's get our hands dirty and write some code. 4 4 00:00:05,442 --> 00:00:09,131 So we'll use the previous project from before. 5 5 00:00:09,131 --> 00:00:11,642 Our development process, the first thing we need to do 6 6 00:00:11,642 --> 00:00:15,399 is define the dependency interface and class. 7 7 00:00:15,399 --> 00:00:18,674 So we'll go ahead and start off with the first step here. 8 8 00:00:18,674 --> 00:00:21,424 line:15% The first thing we need to do is define an interface, 9 9 00:00:21,424 --> 00:00:23,417 line:15% so I'll say New, Interface. 10 10 00:00:23,417 --> 00:00:26,908 I'll give the name of this interface as FortuneService. 11 11 00:00:26,908 --> 00:00:30,491 Once you're happy, click the Finish button. 12 12 00:00:32,225 --> 00:00:34,499 So we have this very empty interface right here. 13 13 00:00:34,499 --> 00:00:38,542 I'll simply define one method called getFortune, 14 14 00:00:38,542 --> 00:00:40,466 and this method returns a string. 15 15 00:00:40,466 --> 00:00:42,149 And since this is an interface, 16 16 00:00:42,149 --> 00:00:44,174 there's no actual implementation code. 17 17 00:00:44,174 --> 00:00:47,687 We simply have just a semicolon, no curly brace or anything, 18 18 00:00:47,687 --> 00:00:49,854 just the method signature. 19 19 00:00:51,067 --> 00:00:52,667 Okay, great, so that's our interface. 20 20 00:00:52,667 --> 00:00:54,750 line:15% Now we actually need to create a class 21 21 00:00:54,750 --> 00:00:57,250 line:15% to implement this interface. 22 22 00:00:57,250 --> 00:01:01,749 line:15% So I'll do a right-click, I'll say New, Class. 23 23 00:01:01,749 --> 00:01:04,495 What we'll do is we'll make use of that HappyFortuneService 24 24 00:01:04,495 --> 00:01:06,662 that we saw on the slides. 25 25 00:01:07,967 --> 00:01:09,013 And what we wanna do here 26 26 00:01:09,013 --> 00:01:11,813 is move down to this Interfaces section that's empty, 27 27 00:01:11,813 --> 00:01:14,333 but I wanna click this Add button 28 28 00:01:14,333 --> 00:01:17,658 and actually add an interface to implement. 29 29 00:01:17,658 --> 00:01:20,458 So up top, I'll type in fortune 30 30 00:01:20,458 --> 00:01:22,392 and it will find FortuneService. 31 31 00:01:22,392 --> 00:01:23,899 We'll go ahead and select that one. 32 32 00:01:23,899 --> 00:01:28,299 That's the one that we just created in the previous section. 33 33 00:01:28,299 --> 00:01:30,542 And I will hit OK. 34 34 00:01:30,542 --> 00:01:32,057 And so we should have our interface listed here 35 35 00:01:32,057 --> 00:01:34,349 in the Interfaces section. 36 36 00:01:34,349 --> 00:01:36,283 Once you're happy with that, 37 37 00:01:36,283 --> 00:01:39,200 move down to hit the Finish button. 38 38 00:01:40,568 --> 00:01:42,874 Cool, so we have this HappyFortuneService. 39 39 00:01:42,874 --> 00:01:45,625 Woo-hoo, I like it, getting excited here. 40 40 00:01:45,625 --> 00:01:46,832 Let me expand the window. 41 41 00:01:46,832 --> 00:01:49,467 So our HappyFortuneService 42 42 00:01:49,467 --> 00:01:53,392 implements that interface FortuneService. 43 43 00:01:53,392 --> 00:01:55,100 With that implementation, 44 44 00:01:55,100 --> 00:01:58,016 they gave us an auto-generated stub here 45 45 00:01:58,016 --> 00:02:00,367 for that method getFortune. 46 46 00:02:00,367 --> 00:02:01,250 But here, I'll just go ahead 47 47 00:02:01,250 --> 00:02:03,507 and I'll put in my own little fortune here. 48 48 00:02:03,507 --> 00:02:05,500 I'll just hardcode something for now. 49 49 00:02:05,500 --> 00:02:08,899 I'll say, "Today is your lucky day!" 50 50 00:02:08,899 --> 00:02:10,967 Yay, yeah (giggles). 51 51 00:02:10,967 --> 00:02:13,766 And again, just a very simple implementation 52 52 00:02:13,766 --> 00:02:15,058 that somebody can call this method 53 53 00:02:15,058 --> 00:02:18,225 and they can get their actual fortune. 54 54 00:02:21,070 --> 00:02:24,737 All right, so this looks pretty good so far. 55 55 00:02:27,175 --> 00:02:29,196 Now, what I'd like to do is actually 56 56 00:02:29,196 --> 00:02:32,316 move back over to my Coach interface 57 57 00:02:32,316 --> 00:02:33,916 because in my Coach interface, 58 58 00:02:33,916 --> 00:02:37,376 line:15% I actually wanna add a new method to this Coach interface. 59 59 00:02:37,376 --> 00:02:40,433 line:15% Because our coach already gives daily workouts, 60 60 00:02:40,433 --> 00:02:44,417 line:15% but now, we want our coach to also give daily fortunes. 61 61 00:02:44,417 --> 00:02:47,334 line:15% So here, I'll say, getDailyFortune. 62 62 00:02:50,241 --> 00:02:53,058 line:15% And again, just the method signature, no implementation. 63 63 00:02:53,058 --> 00:02:55,107 line:15% So that's our Coach interface. 64 64 00:02:55,107 --> 00:02:57,258 line:15% And then our class that implement this, 65 65 00:02:57,258 --> 00:02:58,649 line:15% well then, they'll have to provide 66 66 00:02:58,649 --> 00:03:00,982 line:15% some implementation support. 67 67 00:03:02,350 --> 00:03:05,341 line:15% All right, so I'm going to save this Coach interface and, 68 68 00:03:05,341 --> 00:03:07,741 ooh, I see some red exes here. 69 69 00:03:07,741 --> 00:03:11,959 line:15% Oh, I broke some of the classes that implement Coach. 70 70 00:03:11,959 --> 00:03:15,309 line:15% And the reason they broke, because those classes, 71 71 00:03:15,309 --> 00:03:17,865 line:15% they don't implement all the methods (giggles). 72 72 00:03:17,865 --> 00:03:21,441 line:15% So here we can just hover over that red squiggly 73 73 00:03:21,441 --> 00:03:23,742 line:15% and then we can choose that little fix here 74 74 00:03:23,742 --> 00:03:25,632 line:15% that Eclipse is suggesting. 75 75 00:03:25,632 --> 00:03:27,357 line:15% We can add unimplemented methods. 76 76 00:03:27,357 --> 00:03:28,617 Ooh, cool, I like it. 77 77 00:03:28,617 --> 00:03:30,325 So Eclipse is helping us out here. 78 78 00:03:30,325 --> 00:03:32,416 Eclipse said, "Hey, you need this new method 79 79 00:03:32,416 --> 00:03:35,133 that the Coach interface has, and you don't have." 80 80 00:03:35,133 --> 00:03:38,708 So they went ahead and gave it to us, so thank you, Eclipse. 81 81 00:03:38,708 --> 00:03:40,724 And similar thing here for TrackCoach, 82 82 00:03:40,724 --> 00:03:41,557 they don't have it either, 83 83 00:03:41,557 --> 00:03:44,541 so we'll choose Add unimplemented methods. 84 84 00:03:44,541 --> 00:03:48,708 So we're basically just fixing the code that we just broke. 85 85 00:03:49,924 --> 00:03:51,549 And we'll leave it right now for return though. 86 86 00:03:51,549 --> 00:03:52,925 We'll come back to that stuff later. 87 87 00:03:52,925 --> 00:03:55,232 But at least we just have the method in there. 88 88 00:03:55,232 --> 00:03:58,240 We have the placeholder in place 89 89 00:03:58,240 --> 00:04:01,073 just to make it pass the compiler. 7892