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/*
 * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
 */

package com.mycompany.mavenproject3;

/**
 *
 * @author Administrator
 */
import java.util.Scanner;
public class Mavenproject3 {

    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        
        while (true) {            
            
            displayMenu();
            String choice = scan.nextLine();
            
            switch (choice) {
                case "1":
                    System.out.print("-Enter a word: ");
                    String name1 = scan.nextLine();
                    Activity1(name1);
                    break;
                    
                case "2":
                    System.out.print("-Enter the first String: ");
                    String str1 = scan.nextLine();
                    System.out.print("-Enter the second String: ");
                    String str2 = scan.nextLine();
                    Activity2(str1,str2);
                    break;
                    
                case "3":
                    System.out.print("-Enter a word: ");
                    String name2 = scan.nextLine();
                    Activity3(name2);
                    break;
                    
                case"4":
                    System.out.print("-Enter a word to reverse: ");
                    String name3 = scan.nextLine();
                    Activity4(name3);
                    break;
                    
                case "5":
                    System.out.print("-Enter a word: ");
                    String nameToSearch = scan.nextLine();
                    char ch = Act5(scan);
                    Activity5(nameToSearch, ch);
                    break;
                    
                case "6":
                    System.out.println("-Thank you for using the program. Goodbye :)");
                    return;
                    
                default:
                    System.out.println("-Invalid choice, Please Try Again!");
            }
        }
    }
    
    public static void displayMenu() {
        System.out.println("\t=String Manipulation Laboratory=");
        System.out.println("1.String Length and Charactcer Extraction");
        System.out.println("2.Convert and Combine String");
        System.out.println("3.Extract Substring");
        System.out.println("4.Reverse String");
        System.out.println("5.Find and Count Characters");
        System.out.println("6.Exit");
        System.out.print("-Enter a choice: ");
    }
    
    public static void Activity1(String name) {
        System.out.println("-Length of the word: " + name.length());
        System.out.println("-First Character: " + name.charAt(0));
        System.out.println("-Last Character: " + name.charAt(name.length() - 1));
    }
    
    public static void Activity2(String str1, String str2) {
        System.out.println("-Converted to Uppercase: " + str1.toUpperCase() + "" + str2.toLowerCase());
    }
    
    public static void Activity3(String input){
        if (input.length() < 5) {
            System.out.println("-Substring: " + input);
        } else {
            System.out.println("-Substring: " + input.substring(0, 5));
        }
    }
    
    public static void Activity4(String name){
        String result = "";
        
        for (int i = name.length() - 1; i >= 0; i--)
            result += name.charAt(i);
        System.out.println("-Reversed Word: " + result);
    }
    
    public static void Activity5(String name, char ch) {
        int count = 0;
        
        for (int i = 0; i < name.length(); i++) {
            if (name.charAt(i) == ch) {
                count ++;
            }
        }
        System.out.println("-The character '" + ch + "' appears '" + count + ""
                + "' times in the word '" + name + "'.");
    }
    
    public static char Act5(Scanner scan) {
        char ch = '\0';
        
        while (true) {
            System.out.print("-Enter a Character to Count: ");
            String input = scan.nextLine();
            
            if (input.length() == 1) {
                ch = input.charAt(0);
                break;
            } else {
                System.out.println("-Please Enter a Single Character: ");
            }
        }
        return ch;
    }
}