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Moutasim02Moutasim02
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Added Patterns, CeaserCipher Encryption, Check if array is sorted, and ToDo List, Fixed Link of Bubble Sort in the README.md
1 parent 7976819 commit 5b0ad9f

14 files changed

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lines changed

‎Programs/CeaserCipher.java

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package Programs;
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import java.util.Scanner;
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public class CeaserCipher {
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public static void main(String[] args) {
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System.out.println("""
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--------------------------------
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CEASER CIPHER ENCRYPT/ DECRYPT
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--------------------------------
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""");
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Scanner sc = new Scanner(System.in);
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System.out.println("Encrypt or Decrypt:\n 1- Encryption\n 2- Decryption");
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int type = sc.nextInt();
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for (int j = 1; j > 0; j++) {
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if (type == 1) {
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ceaserCipherEncryption();
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break;
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} else if (type == 2) {
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ceaserCipherDecryption();
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break;
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} else {
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System.out.print("Please enter a valid number (1 or 2): ");
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type = sc.nextInt();
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}
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}
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}
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public static void ceaserCipherEncryption() {
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Scanner textInput = new Scanner(System.in);
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System.out.print("PlainText: ");
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String textToEncrypt = textInput.nextLine();
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System.out.print("shifting key: ");
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int keyToUse = textInput.nextInt();
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String cipher = "";
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for (int i = 0; true; i++) {
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if (keyToUse > 50 && keyToUse <= 0) {
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System.out.print("Please Enter key value <= 50: ");
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keyToUse = textInput.nextInt();
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} else {
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for (int j = 0; j < textToEncrypt.length(); j++) {
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char temp = textToEncrypt.charAt(j);
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if (temp >= 'A' && temp <= 'Z') {
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temp = (char) (temp + keyToUse);
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if (temp > 'Z') { // go back to A in Ascii
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temp = (char) (temp + 'A' - 'Z' - 1);
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}
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cipher += temp;
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} else if (temp >= 'a' && temp <= 'z') {
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temp = (char) (temp + keyToUse);
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if (temp > 'z') { // go back to a in Ascii
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temp = (char) (temp + 'a' - 'z' - 1);
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}
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cipher += temp;
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} else
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cipher += temp;
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}
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}
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System.out.println("Enrypted text is: " + cipher);
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break;
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}
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}
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public static void ceaserCipherDecryption() {
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Scanner textInput = new Scanner(System.in);
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System.out.print("Encrypted Text: ");
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String textToEncrypt = textInput.nextLine();
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System.out.print("shifting key: ");
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int keyToUse = textInput.nextInt();
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String cipher = "";
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for (int i = 0; true; i++) {
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if (keyToUse > 50 && keyToUse <= 0) {
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System.out.print("Please Enter key value <= 50: ");
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keyToUse = textInput.nextInt();
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} else {
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for (int j = 0; j < textToEncrypt.length(); j++) {
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char temp = textToEncrypt.charAt(j);
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if (temp >= 'A' && temp <= 'Z') {
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temp = (char) (temp - keyToUse);
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if (temp < 'A') { // go back to A in Ascii
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temp = (char) (temp - 'A' + 'Z' + 1);
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}
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cipher += temp;
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} else if (temp >= 'a' && temp <= 'z') {
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temp = (char) (temp - keyToUse);
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if (temp < 'a') { // go back to a in Ascii
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temp = (char) (temp - 'a' + 'z' + 1);
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}
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cipher += temp;
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} else
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cipher += temp;
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}
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}
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System.out.println("Decrypted text is: " + cipher);
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break;
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}
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}
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}

‎Programs/Check_If_Sorted.java

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package Programs;
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public class Check_If_Sorted {
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public static void main(String[] args) {
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int[] toCheck = {1, 2, 3, 5, 16, 8};
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int pointer = 0;
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System.out.println(checkIfSorted(toCheck, pointer));
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}
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private static boolean checkIfSorted(int[] toCheck, int pointer) {
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if (pointer == toCheck.length - 1) {
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return true;
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}
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return toCheck[pointer] < toCheck[pointer + 1] && checkIfSorted(toCheck, pointer + 1);
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}
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}

‎Programs/ToDoList.java

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package Programs;
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import java.util.ArrayList;
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import java.util.Scanner;
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public class ToDoList {
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public static void main(String[] args) {
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ArrayList<String> tasks = new ArrayList<>();
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list(tasks);
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}
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public static void list(ArrayList<String> tasks) {
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Scanner sc = new Scanner(System.in);
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System.out.print("Function you want to apply(1-4):\n"
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+ "1- View\n"
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+ "2- Add\n"
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+ "3- Delete All Tasks\n"
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+ "> ");
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int desiredFunction = sc.nextInt();
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choose(desiredFunction, tasks, sc);
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}
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public static void choose(int desiredFunction, ArrayList<String> tasks, Scanner sc) {
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if (desiredFunction == 1) {
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viewTask(tasks);
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} else if (desiredFunction == 2) {
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addTask(tasks);
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} else if (desiredFunction == 3) {
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deleteTasks(tasks);
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} else {
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System.out.println("Please choose in the range of 1 till 3 only!");
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list(tasks);
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}
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}
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static void addTask(ArrayList<String> tasks) {
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Scanner sc = new Scanner(System.in);
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System.out.print("Task to save\n> ");
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tasks.add(sc.nextLine());
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System.out.print("Add more?\n 1- Yes\n 2- No\n> ");
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int yn = sc.nextInt();
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if (yn == 1) {
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addTask(tasks);
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} else if (yn == 2){
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list(tasks);
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} else {
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System.out.println("Invalid number!");
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addTask(tasks);
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}
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}
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static void viewTask(ArrayList<String> tasks) {
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if (tasks.isEmpty()) {
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System.out.println("""
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--------------------
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No current tasks!
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--------------------""");
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} else {
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System.out.println("""
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--------------------
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Tasks
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--------------------""");
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int counter = 1;
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for (int i = 0; i < tasks.size(); i++) {
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System.out.println(counter + "- " + tasks.get(i));
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counter++;
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}
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}
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System.out.println("\nSelect from the following commands:");
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list(tasks);
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}
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static void deleteTasks(ArrayList<String> tasks) {
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tasks.clear();
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}
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}

‎Programs/patterns/Pattern1.java

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package Programs.patterns;
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public class Pattern1 {
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public static void main(String[] args) {
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pattern1(4);
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}
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// *
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// * *
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// * * *
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// * * * *
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private static void pattern1(int n) {
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// for every row, run the col
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for (int row = 0; row <= n; row++) {
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for (int col = 0; col < row; col++) {
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System.out.print("* ");
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}
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System.out.println();
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}
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}
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}
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‎Programs/patterns/Pattern2.java

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package Programs.patterns;
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public class Pattern2 {
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public static void main(String[] args) {
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patter2(4);
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}
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// * * * *
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// * * * *
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// * * * *
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// * * * *
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// * * * *
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private static void patter2(int n) {
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// for every row, run the col
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for (int row = 0; row <= n; row++) {
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for (int col = 0; col < n; col++) {
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System.out.print("* ");
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}
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System.out.println();
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}
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}
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}

‎Programs/patterns/Pattern3.java

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package Programs.patterns;
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public class Pattern3 {
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public static void main(String[] args) {
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pattern3(4);
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}
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// * * * *
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// * * *
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// * *
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// *
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static void pattern3(int n) {
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for (int row = 1; row <= n; row++) {
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// for every row, run the col
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for (int col = 1; col <= n-row+1; col++) {
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System.out.print("* ");
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}
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// when one row is printed, we need to add a newline
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System.out.println();
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}
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}
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}

‎Programs/patterns/Pattern4.java

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package Programs.patterns;
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public class Pattern4 {
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public static void main(String[] args) {
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pattern4(4);
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}
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// 1
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// 1 2
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// 1 2 3
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// 1 2 3 4
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static void pattern4(int n) {
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for (int row = 1; row <= n; row++) {
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// for every row, run the col
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for (int col = 1; col <= row; col++) {
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System.out.print(col + " ");
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}
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// when one row is printed, we need to add a newline
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System.out.println();
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}
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}
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}

‎Programs/patterns/Pattern5.java

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package Programs.patterns;
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public class Pattern5 {
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public static void main(String[] args) {
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pattern5(4);
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}
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// *
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// * *
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// * * *
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// * * * *
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// * * *
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// * *
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// *
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static void pattern5(int n) {
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for (int row = 0; row < 2 * n; row++) {
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int totalColsInRow = row > n ? 2 * n - row: row;
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for (int col = 0; col < totalColsInRow; col++) {
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System.out.print("* ");
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}
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System.out.println();
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}
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}
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}

‎Programs/patterns/Pattern6.java

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package Programs.patterns;
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public class Pattern6 {
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public static void main(String[] args) {
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pattern6(4);
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}
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// *
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// * *
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// * * *
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// * * * *
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// * * *
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// * *
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// *
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private static void pattern6(int n) {
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for (int row = 0; row < 2 * n; row++) {
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int totalColsInRow = row > n ? 2 * n - row: row;
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int noOfSpaces = n - totalColsInRow;
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for (int s = 0; s < noOfSpaces; s++) {
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System.out.print(" ");
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}
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for (int col = 0; col < totalColsInRow; col++) {
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System.out.print("* ");
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}
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System.out.println();
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}
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}
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}

‎Programs/patterns/Pattern7.java

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package Programs.patterns;
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public class Pattern7 {
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public static void main(String[] args) {
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pattern7(4);
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}
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// 1
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// 2 1 2
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// 3 2 1 2 3
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//4 3 2 1 2 3 4
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// 3 2 1 2 3
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// 2 1 2
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// 1
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static void pattern7(int n) {
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for (int row = 1; row <= 2 * n; row++) {
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int c = row > n ? 2 * n - row: row;
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for (int space = 0; space < n-c; space++) {
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System.out.print(" ");
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}
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for (int col = c; col >= 1; col--) {
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System.out.print(col + " ");
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}
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for (int col = 2; col <= c; col++) {
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System.out.print(col + " ");
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}
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System.out.println();
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}
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}
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}

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