update SphereArea.java

.classpath

@@ -1,6 +1,6 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<classpath>
-	<classpathentry kind="src" path="src"/>
-	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8"/>
-	<classpathentry kind="output" path="bin"/>
-</classpath>
+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8"/>
+	<classpathentry kind="output" path="bin"/>
+</classpath>

.gitignore

@@ -1,56 +1,57 @@
-.metadata
-bin/
-tmp/
-*.tmp
-*.bak
-*.swp
-*~.nib
-local.properties
-.settings/
-.loadpath
-.recommenders
-
-# External tool builders
-.externalToolBuilders/
-
-# Locally stored "Eclipse launch configurations"
-*.launch
-
-# PyDev specific (Python IDE for Eclipse)
-*.pydevproject
-
-# CDT-specific (C/C++ Development Tooling)
-.cproject
-
-# CDT- autotools
-.autotools
-
-# Java annotation processor (APT)
-.factorypath
-
-# PDT-specific (PHP Development Tools)
-.buildpath
-
-# sbteclipse plugin
-.target
-
-# Tern plugin
-.tern-project
-
-# TeXlipse plugin
-.texlipse
-
-# STS (Spring Tool Suite)
-.springBeans
-
-# Code Recommenders
-.recommenders/
-
-# Annotation Processing
-.apt_generated/
-.apt_generated_test/
-
-# Scala IDE specific (Scala & Java development for Eclipse)
-.cache-main
-.scala_dependencies
-.worksheet
+.metadata
+bin/
+tmp/
+*.tmp
+*.bak
+*.swp
+*~.nib
+*.class
+local.properties
+.settings/
+.loadpath
+.recommenders
+
+# External tool builders
+.externalToolBuilders/
+
+# Locally stored "Eclipse launch configurations"
+*.launch
+
+# PyDev specific (Python IDE for Eclipse)
+*.pydevproject
+
+# CDT-specific (C/C++ Development Tooling)
+.cproject
+
+# CDT- autotools
+.autotools
+
+# Java annotation processor (APT)
+.factorypath
+
+# PDT-specific (PHP Development Tools)
+.buildpath
+
+# sbteclipse plugin
+.target
+
+# Tern plugin
+.tern-project
+
+# TeXlipse plugin
+.texlipse
+
+# STS (Spring Tool Suite)
+.springBeans
+
+# Code Recommenders
+.recommenders/
+
+# Annotation Processing
+.apt_generated/
+.apt_generated_test/
+
+# Scala IDE specific (Scala & Java development for Eclipse)
+.cache-main
+.scala_dependencies
+.worksheet

.project

@@ -1,17 +1,17 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<projectDescription>
-	<name>GitAssignmentObserver</name>
-	<comment></comment>
-	<projects>
-	</projects>
-	<buildSpec>
-		<buildCommand>
-			<name>org.eclipse.jdt.core.javabuilder</name>
-			<arguments>
-			</arguments>
-		</buildCommand>
-	</buildSpec>
-	<natures>
-		<nature>org.eclipse.jdt.core.javanature</nature>
-	</natures>
-</projectDescription>
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>GitAssignmentObserver</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+	</natures>
+</projectDescription>

.travis.yml

@@ -0,0 +1,8 @@
+language: bash
+install: true
+jdk: orcalejdk13
+before_script: cd src
+script:
+- javac MainTest.java
+- java MainTest
+

src/CircleArea.java

@@ -0,0 +1,22 @@
+public class CircleArea extends ThreadSubscriber implements ObserverTest {
+	double input;
+
+	@Override
+	public void notifySubscriber() {
+        input = topic.getInput();
+        System.out.println("Area of the circle is  "+execute()+" in centimetres squared");
+
+	}
+
+	@Override
+	public String execute() {
+  	 	String res = String.valueOf(3.14159265359*input*input);
+        return res;	
+	}
+
+	@Override
+	public Boolean test() {
+	        input = 1;		
+	return execute().equals("3.14159265359");
+	}
+}

src/CircleCircumference.java

@@ -0,0 +1,21 @@
+public class CircleCircumference extends ThreadSubscriber implements ObserverTest {
+	double input;
+
+	@Override
+	public void notifySubscriber()
+	{
+		input = topic.getInput();
+		System.out.println("Circle Circumference: " + execute());
+	}
+
+	@Override
+	public String execute() {
+		return String.valueOf(2 * input * 3.14);
+	}
+
+	@Override
+	public Boolean test() {
+		input = 0.5;
+		return execute().equals("3.14");
+	}
+}

src/CircleVolum.java

@@ -0,0 +1,27 @@
+public class CircleVolum extends ThreadSubscriber implements  ObserverTest 
+{
+      double input;
+
+      public void notifySubscriber() {
+    	  input=topic.getInput();
+    	  System.out.println("Volume = " + execute());
+      }
+@Override
+  public String execute()
+     {   
+            double  volume= (4*22*input*input*input)/(3*7);
+
+            String result=String.valueOf(volume);
+
+            return result;
+      }
+@Override
+public Boolean test() {
+	input = 5;
+	if (execute().equals("523.8095238095239"))
+	return true;
+	else
+		return false;
+
+}
+}

src/Fibonacci.java

@@ -0,0 +1,39 @@
+public class Fibonacci extends ThreadSubscriber implements ObserverTest {
+	double input;
+	@Override
+	public void notifySubscriber() {
+		input = topic.getInput();
+		System.out.println("Result of Fibonacci series at "+input+": "+execute());
+	}
+	@Override
+	public String execute() {
+		int num1 = 0;
+		int num2 = 1;
+		int sum = 0;
+		if(input<=1)
+			sum = (int)input;
+		for(int i=1 ; i < input ; i++) {
+			sum = num1 + num2;
+			num1 = num2;
+			num2 = sum;
+		}
+		String str = String.valueOf(sum);
+
+	    return str;
+	}
+	@Override
+
+	public Boolean test() {
+		input = 4;
+		if(!execute().equals("3")) {
+			return false;
+		}
+		input = 10;
+		if(!execute().equals("55")) {
+			return false;
+		}
+		return true;
+
+	}
+}
+

src/ISubscriber.java

@@ -1,4 +1,5 @@
 
 public interface ISubscriber {
-	public abstract void notifySubscriber(String input);
+	public abstract void notifySubscriber();
+	public abstract String execute();
 }

src/LucasSeries.java

@@ -0,0 +1,30 @@
+public class LucasSeries extends ThreadSubscriber implements ObserverTest {
+       double input;
+
+       @Override
+       public void notifySubscriber() {
+            input = topic.getInput();
+            System.out.println("Lucas Series of " + (int) input + " = " + execute());
+       }
+
+       @Override
+       public String execute() {
+            if ((int) input == 0)
+                return "2";
+
+            int fn_2 = 2, fn_1 = 1;
+            for (int i = 2; i <= (int) input; ++i) {
+                int temp = fn_1;
+                fn_1 = fn_1 + fn_2;
+                fn_2 = temp;
+            }
+
+            return String.valueOf(fn_1);
+       }
+
+       @Override
+       public Boolean test() {
+           input = 5;
+           return execute().equals("11");
+       }
+}

src/Main.java

@@ -1,17 +1,30 @@
-import java.util.Scanner;
-
-public class Main {
-	private static ISubscriber subscribers [] = {
-			new SimpleSubscriber(),
-			new ReallySimpleSubscriber(),
-	};
-	public static void main(String[] args) {
-		Topic mathTopic = new Topic();
-		for (ISubscriber sub : subscribers) {
-			mathTopic.addSubscriber(sub);
-		}
-		Scanner sc = new Scanner(System.in);
-		String input = sc.next();
-		mathTopic.dispatchEvent(input);
-	}
-}
+import java.util.Scanner;
+
+public class Main {
+
+	public static void main(String[] args) {
+		while(true) {
+			ThreadSubscriber subscribers [] = {
+					new SphereArea() ,
+					new CircleArea(),
+					new CircleCircumference(),
+					new SummationSeries(),
+					new MultiplicationSeries(),
+					new CircleVolum(),
+					new LucasSeries(),
+					new Fibonacci(),
+					new twoPowerN()
+			};
+
+			Topic mathTopic = new Topic();
+			for (ThreadSubscriber sub : subscribers) {
+				mathTopic.addSubscriber(sub);
+				sub.setTopic(mathTopic);
+			}
+			Scanner sc = new Scanner(System.in);
+			double input = sc.nextDouble();
+			mathTopic.setInput(input);
+			mathTopic.dispatchEvent();
+		}
+	}
+}

src/MainTest.java

@@ -0,0 +1,24 @@
+public class MainTest {
+    private static ObserverTest subscribers [] = {
+            new SphereArea() ,
+            new CircleArea(),
+            new CircleCircumference(),
+            new SummationSeries(),
+            new MultiplicationSeries(),
+            new CircleVolum(),
+	        new LucasSeries(),
+	        new Fibonacci(),
+	        new twoPowerN()
+
+    };
+
+    public static void main(String[] args) {
+        for (ObserverTest sub : subscribers){
+            Boolean res = sub.test();
+            if(res!=null && res==false){
+                System.exit(1);
+            }
+        }
+    }
+}
+