From 58a1846dcbd7c4e9afe71bf0459f1dcd6186778c Mon Sep 17 00:00:00 2001 From: shwetha729 Date: Mon, 28 Aug 2023 11:20:58 -0400 Subject: [PATCH] Updated: Monday, August 28,2023-08-28 11:20:53 --- enter/Java.md | 79 ++++++++++++++++++++++++++++++++++++++++----------- 1 file changed, 63 insertions(+), 16 deletions(-) diff --git a/enter/Java.md b/enter/Java.md index a2f2544..a5ec88f 100644 --- a/enter/Java.md +++ b/enter/Java.md @@ -172,6 +172,8 @@ public Broadcaster(int numSubscribers) 9. Create a class called TestSubscriber in the message package. Copy&paste: +```java + package message; public class TestSubscriber implements ISubscriber @@ -218,11 +220,15 @@ public class TestSubscriber implements ISubscriber } +``` + If you run it, it SHOULD look like this in the output: +``` + TestSubscriber notified, name = first TestSubscriber notified, name = second @@ -231,12 +237,16 @@ TestSubscriber notified, name = third TestSubscriber notified, name = fourth +``` + 10.  change to this for testing purposes: + +```java Broadcaster b = new Broadcaster(4); b.subscribe(new TestSubscriber("first")); @@ -246,27 +256,32 @@ b.subscribe(new TestSubscriber("second")); b.notify(null); // we'll use a null message for now error! +``` + to fix: don’t call notify method on null array location  -11.  Copy&Paste Broadcaster class and rename as Sequencer +11.  Copy&Paste Broadcaster class and rename as `Sequencer` -12.  Change the notify method so that it looks like this: +12.  Change the `notify` method so that it looks like this: -create private member variable first: int y = 0; +```java +int y = 0; method: public void notify(){ if(array = null){???} +``` +create private member variable first: furthermore fix the sequncermuch like above so that it works if any/all of array location are null @@ -274,6 +289,7 @@ furthermore fix the sequncermuch like above so that it works if any/all of array this should be the output if it works: +``` TestSubscriber notified, name = first TestSubscriber notified, name = second @@ -282,6 +298,8 @@ TestSubscriber notified, name = first TestSubscriber notified, name = second +``` + @@ -295,7 +313,7 @@ TestSubscriber notified, name = second -15.  Make a new class called Clock  in model package , download class file from website and paste code into the class +15.  Make a new class called `Clock`  in model package , download class file from website and paste code into the class @@ -305,11 +323,12 @@ TestSubscriber notified, name = second -17.  Create a TestClock class in the model package with main method: +17.  Create a `TestClock` class in the model package with main method: code should look like this: +``` public static void main(String[] args) { @@ -326,22 +345,22 @@ public static void main(String[] args) +``` + + output should be this (8 times, once every half second): -TestSubscriber notified, name = clock tick +``TestSubscriber notified, name = clock tick`` -replace the TestSubscriber in the main method with a  - -Sequencer, but then put a few TestSubscriber instances in the sequencer. Have the  - -sequencer subscribe to the clock. Run it! +replace the TestSubscriber in the main method with a Sequencer, but then put a few TestSubscriber instances in the sequencer. Have the sequencer subscribe to the clock. Run it! output should be this: +``` TestSubscriber notified, name = first TestSubscriber notified, name = second @@ -358,6 +377,8 @@ TestSubscriber notified, name = third TestSubscriber notified, name = fourth +``` + @@ -372,9 +393,9 @@ TestSubscriber notified, name = fourth -20.  Create a class called Sound  and paste this (you should hear sound after running and you can choose which sounds to put in ): +20.  Create a class called `Sound`  and paste this (you should hear sound after running and you can choose which sounds to put in ): - +``` public class TestSound { @@ -393,9 +414,13 @@ public class TestSound } + + +``` + -21.  Create a class called SoundPlayer +21.  Create a class called `SoundPlayer` 22.  make it implements the ISubscriber interface @@ -410,7 +435,7 @@ public class TestSound 24.  create a constructor with String parameter: - +``` public Sound _name; public SoundPlayer(String x){ @@ -419,13 +444,20 @@ _name = new Sound (x); } +``` + + 25.  create another constructor with Sound parameter: +```java + pubic SoundPlayer(Sound y){ y = _name; +``` + 26. inside the notify method, play the sound? @@ -433,9 +465,10 @@ y = _name; -27.  Create TestSoundPlayer class in model package, and copy&paste this: +27.  Create `TestSoundPlayer` class in model package, and copy&paste this: +```java public static void main(String[] args) { @@ -474,6 +507,10 @@ public static void main(String[] args) } + +``` + + 28.  create comments for this class (SoundPlayer) @@ -486,12 +523,16 @@ public static void main(String[] args) 30.  create a constructor like this: +```java  public Chord(Sound[ ] x){ super(sounds.length);} + +``` + 31. @@ -505,6 +546,12 @@ instance. lolwut? It works like this: + +``` + + + +``` for(some loop) {