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Updated: Monday, August 28,2023-08-28 11:20:53

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shwetha729 2023-08-28 11:20:58 -04:00
parent 166ba28236
commit 58a1846dcb
1 changed files with 63 additions and 16 deletions
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@ -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)
{