I finished

untitled/src/ua/jet/MainClass.java

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+package ua.jet;
+
+import java.io.BufferedReader;
+import java.io.InputStreamReader;
+import java.math.BigInteger;
+import java.util.ArrayList;
+import java.util.List;
+
+
+public class MainClass {
+
+    public static String screenReader(String message){
+        try {
+            System.out.println(message);
+            BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in));
+            return bufferedReader.readLine();
+        }catch (Exception e){
+            return "Wrong value!!!!";
+        }
+    }
+
+    public static void factorial(Integer numeral){
+
+            BigInteger factorial=BigInteger.valueOf(1);
+            if (numeral>=0){
+                for (int i=1 ; i < numeral+1 ; i++) {
+                    factorial=factorial.multiply(BigInteger.valueOf(i));
+                }
+            System.out.println("Factorial for number - "+numeral+" is equal to - "+factorial.toString());
+            } else if (numeral<0){
+                System.out.println("For this number can not be counted factorial");
+            }
+
+    }
+
+    public static void sequenceFibonachi(Integer numeral){
+        if (numeral>0) {
+            List<BigInteger> listFibonachi = new ArrayList<BigInteger>();
+            for (int i = 0; i < numeral; i++) {
+                if (i == 0||i==1) {
+                    listFibonachi.add (BigInteger.valueOf(1));
+                }else {
+                    listFibonachi.add(listFibonachi.get(i-2).add(listFibonachi.get(i - 1)));
+                }
+            }
+            for (BigInteger elementFibonachi:listFibonachi){
+                System.out.print(elementFibonachi.toString() + " ");
+            }
+        }else {
+            System.out.println("Wrong value!!!");
+        }
+    }
+
+    public static void numberWordConverter(Integer numeral){
+        List<String> wordsList = new ArrayList<String>(10);
+        wordsList.add("Zero");
+        wordsList.add("One");
+        wordsList.add("Two");
+        wordsList.add("Three");
+        wordsList.add("Four");
+        wordsList.add("Five");
+        wordsList.add("Six");
+        wordsList.add("Seven");
+        wordsList.add("Eight");
+        wordsList.add("Nine");
+
+        try{
+            System.out.println(wordsList.get(numeral));
+        }catch (Exception e){
+            System.out.println("This is not numeral. . . . ");
+        }
+
+    }
+
+    public static void main(String[] args){
+
+        try {
+            Integer numeralFromScreen = Integer.parseInt(screenReader("Choose :\n1.Factorial\n2.Sequence of Fibonachi\n3.Write a word for your numeral"));
+            switch (numeralFromScreen){
+                case 1: factorial(Integer.parseInt(screenReader("Enter number :")));
+                        break;
+                case 2: sequenceFibonachi(Integer.parseInt(screenReader("How many numbers from sequence you want to see?")));
+                        break;
+                case 3: numberWordConverter(Integer.parseInt(screenReader("Enter your numeral:")));
+                        break;
+                default:
+                    System.out.println("wrong value!!!");
+            }
+
+        }catch (Exception e){
+            System.out.println("Wrong value\n"+ e.toString());
+        }
+
+    }
+}

untitled/untitled.iml

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+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="jdk" jdkName="1.8" jdkType="JavaSDK" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>