functions-introduction done

Answers/src/com/company/Main.java

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+package com.company;
+
+import java.util.Arrays;
+import java.util.Objects;
+import java.util.Scanner;
+
+public class Main {
+
+    static String fullNameStatic = "";
+    static String phoneNumberStatic = "";
+    static String idStatic = "";
+    static int lenStatic;
+    static String[] finalInterestsStatic = new String[10];
+
+    public static String fullName(){
+        System.out.println("enter your name : ");
+        Scanner input = new Scanner(System.in);
+        String firstname = input.nextLine();
+        System.out.println("enter your lastname : ");
+        String lastname = input.nextLine();
+        char[] firstNameChar = firstname.toCharArray();
+        char[] lastNameChar = lastname.toCharArray();
+
+        for (int i = 0 ; i < firstNameChar.length ; i++){
+            if (firstNameChar[i] >= 'A' && firstNameChar[i] <= 'Z'){
+                firstNameChar[i]= (char) (firstNameChar[i]+32);
+            }
+
+        }
+        firstNameChar[0]= (char) (firstNameChar[0]-32);
+
+        for (int i = 0 ; i < lastNameChar.length ; i++){
+            if (lastNameChar[i] >= 'A' && lastNameChar[i] <= 'Z'){
+                lastNameChar[i]= (char) (lastNameChar[i]+32);
+            }
+
+        }
+        lastNameChar[0]= (char) (lastNameChar[0]-32);
+
+        fullNameStatic = String.valueOf(firstNameChar) + " " + String.valueOf(lastNameChar);
+        return fullNameStatic;
+
+    }
+
+    public static String phoneNumber(){
+
+        boolean condition = true;
+
+        while (condition){
+            Scanner input = new Scanner(System.in);
+            String phoneNumber = input.nextLine();
+            char[] phoneNumberChar = phoneNumber.toCharArray();
+            if (phoneNumberChar[0] == '9' && phoneNumberChar.length == 10){
+                phoneNumberStatic = "0" + String.valueOf(phoneNumberChar);
+                return "0" + String.valueOf(phoneNumberChar);
+            } else
+                System.out.println("Wrong entry. Try again.");
+        }
+
+        return null;
+    }
+
+    public static String userId(){
+
+        Scanner input = new Scanner(System.in);
+        while (true){
+            String id = input.nextLine();
+            char[] idChar = id.toCharArray();
+            if ( idChar.length <= 13 && idChar.length >= 3){
+                idStatic = String.valueOf(idChar);
+                return String.valueOf(idChar);
+            } else
+                System.out.println("Wrong entry. Try again.");
+        }
+
+    }
+
+    public static String[] getInterests(){
+
+        String[] interests = new String[10];
+        Scanner input = new Scanner(System.in);
+        int len = 0;
+        for (int i = 0 ; i < 10 ; i++){
+            String interest = input.nextLine();
+            if (Objects.equals(interest, "end")){
+                break;
+            }
+            interests[i]=interest;
+            len++;
+        }
+        lenStatic = len;
+        String[] finalInterests = new String[len];
+        for (int i = 0 ; i < len ; i++){
+            finalInterests[i] = interests[i];
+        }
+
+        for (int i = 0 ; i < len ; i++){
+            finalInterestsStatic[i] = finalInterests[i];
+
+        }
+
+        return finalInterests;
+    }
+
+    public static String userFullInformation(){
+        String s1 = "Hello! My name is " + fullNameStatic + ".My ID is " + idStatic + ". Here are some of my interests:";
+        String s2 = "";
+        for (int i = 0 ; i < lenStatic ; i++){
+            s2 = s2 + "\n";
+            s2 = s2 + (i+1) + ". " + finalInterestsStatic[i]  ;
+        }
+        String s3 = "You can reach me via my phone number " + phoneNumberStatic;
+        return s1 + s2 + "\n" + s3;
+    }
+
+    public static String informationEncoder (String userInfo, int shift) {
+        char[] informationChar = userInfo.toCharArray();
+
+        for (int i = 0; i < informationChar.length; i++){
+            char currentChar = informationChar[i];
+
+            if (Character.isLetter(currentChar)) {
+                char shifting;
+                if (Character.isLowerCase(currentChar)) {
+                    shifting = 'a';
+                } else { shifting = 'A';}
+
+                informationChar[i] = (char) ((currentChar - shifting + shift)%26 + shifting);
+
+            }
+        }
+
+        return String.valueOf(informationChar);
+    }
+
+    public static void informationDecoder(String userInfo, int shift) {
+        char[] informationChar = userInfo.toCharArray();
+
+        for (int i = 0; i < informationChar.length; i++) {
+            char currentChar = informationChar[i];
+
+            if (Character.isLetter(currentChar)) {
+                char shifting;
+                if (Character.isLowerCase(currentChar)) {
+                    shifting = 'a';
+                } else { shifting = 'A';}
+                int decoded = currentChar - shift - shifting;
+                if (decoded < 0) {
+                    decoded+= 26;
+                }
+                informationChar[i] = (char) (decoded + shifting);
+            }
+        }
+
+        System.out.println(String.valueOf(informationChar));
+    }
+
+    public static void main(String[] args) {
+
+        //first function
+        System.out.println("Full name : " + fullName());
+
+        //second function
+        System.out.println("enter your phone number : ");
+        System.out.println("phone number : " + phoneNumber());
+
+        //third function
+        System.out.println("enter your ID : ");
+        System.out.println("ID : " + userId());
+
+        //fourth function
+        System.out.println("enter your interests : ");
+        System.out.println("the maximum number of interests is 10.");
+        System.out.println("if you want to enter less than 10 interests, you have to enter \"end\" when you are finished.");
+        System.out.println(Arrays.toString(getInterests()));
+
+        //fifth function
+        //System.out.println(userFullInformation());
+        String userInfo = userFullInformation();
+
+        //sixth and seventh function
+        System.out.println("if you want to see the encoded version of your info please enter \"encode\" , if you don't want to enter \"info\".");
+        Scanner input = new Scanner(System.in);
+        String entry = input.nextLine();
+
+        if (Objects.equals(entry, "encode")){
+            System.out.println("enter the amount of shift : ");
+            int shift = input.nextInt();
+            System.out.println(informationEncoder(userInfo , shift));
+            System.out.println("if you want to see the decoded version enter \"decode\" and if you don't want to, enter anything :)." );
+            Scanner input2 = new Scanner(System.in);
+            String entry2 = input2.nextLine();
+            if (Objects.equals(entry2, "decode")){
+                String userInfo2 = informationEncoder(userInfo , shift);
+                informationDecoder(userInfo2, shift);
+            }
+        }
+        if (Objects.equals(entry, "info")){
+            System.out.println(userFullInformation());
+        }
+
+    }
+}

Answers/untitled104.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="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
+