Aya

init.txt

@@ -0,0 +1,2 @@
+init repo
+

src/CircleAreaObserver.java

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+public class CircleAreaObserver implements  ISubscriber {
+    @Override
+    public void notifySubscriber(String input) {
+        System.out.println("Circle of radius  = " + " has Area = "  + areaOfCircle(Integer.parseInt(input)));
+    }
+    private double areaOfCircle(int r){
+        return Math.PI *r *2;
+
+    }
+}

src/CircleCircumference.java

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+public class CircleCircumference implements ISubscriber {
+
+	public void notifySubscriber(String input) {
+            double radius=Double.parseDouble(input);
+		    //System.out.println("Hello, I am really a simple subscriber and I am notified with " + input);
+            double circumference= Math.PI * 2*radius;
+            System.out.println( "The circumference of this circle is: "+circumference) ;
+    }
+}

src/LucasSeriesSub.java

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+import java.util.ArrayList;
+
+public class LucasSeriesSub implements ISubscriber {
+    @Override
+    public void notifySubscriber(String input) {
+        int numOfTerms = Integer.parseInt(input);
+        ArrayList<Integer>lucesResult = new ArrayList<Integer>();
+        int temp1 = 2  , temp2 = 1;
+        int j = 0 , temp = 0;
+        if(numOfTerms == 1)
+        {
+            lucesResult.add(temp1);
+        }
+        else if (numOfTerms == 2)
+        {
+            lucesResult.add(temp1);
+            lucesResult.add(temp2);
+        }
+        else if (numOfTerms > 2)
+        {
+            lucesResult.add(temp1);
+            lucesResult.add(temp2);
+            for(int i = 2 ; i  < numOfTerms ; i++)
+            {
+                temp1 = lucesResult.get(j);
+                temp2 = lucesResult.get(++j);
+                temp = temp1 + temp2;
+                lucesResult.add(temp);
+            }
+        }
+        else
+        {
+            System.out.println("Not invalid Input");
+            System.exit(0);
+        }
+        System.out.println("The Series is : " + lucesResult);
+    }
+
+}

src/Main.java

@@ -2,8 +2,13 @@
 
 public class Main {
 	private static ISubscriber subscribers [] = {
-			new SimpleSubscriber(),
-			new ReallySimpleSubscriber(),
+		  new MultiplicationSeries(),
+			new CircleAreaObserver(),
+			new Power(),
+			new SphereVolume(),
+			new CircleCircumference(),
+			new SphereAreaSub(),
+      new LucasSeriesSub()
 	};
 	public static void main(String[] args) {
 		Topic mathTopic = new Topic();

src/MultiplicationSeries.java

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+public class MultiplicationSeries implements ISubscriber {
+	public void notifySubscriber(String input){	
+		// TODO Auto-generated method stub
+
+		int n =Integer.parseInt(input);
+		int result = n;
+
+
+		while(n>1) {
+			n-=1;
+			result =result *n;
+
+
+		}
+		System.out.println("the multiplication series of  " + input +" is " + result );
+	}
+}

src/Power.java

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+import java.math.*;
+public class Power implements ISubscriber {
+	@Override
+	public void notifySubscriber(String input) {
+		// TODO Auto-generated method stub
+		System.out.println("2 Power "+input+": "+Math.pow(2, Double.parseDouble(input)));
+	}
+}

src/SphereAreaSub.java

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+
+public class SphereAreaSub implements ISubscriber{
+
+
+	public void notifySubscriber(String input) { // input will be a single integer for all functions.
+		int r = Integer.parseInt(input);// radius
+		double area;
+		area = 4 * 3.14 * (r*r); // 4Pi*r^2.
+		System.out.println("Sphere Area with r = "+ r +": " + area);
+	}
+
+
+}

src/SphereVolume.java

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+
+public class SphereVolume implements ISubscriber{
+	public void notifySubscriber(String input) {
+		Float Rad;
+		double Res;
+		Rad = Float.parseFloat(input);
+		Res=(4/3)*(3.14)*(Rad*Rad*Rad);
+		System.out.println("Sphere Volume =" + Res);
+	}
+
+}