Java Kernel for Jupyter Notebooks.
[Install Java kernel readme}(https://github.com/SpencerPark/IJava). Java will require an independent kernel in Jupyter Notebooks. The instruction performed by the Teacher follows, but look to readme if you have troubles.
(base) id:~$ wget https://github.com/SpencerPark/IJava/releases/download/v1.3.0/ijava-1.3.0.zip # download IJava kernel as zip
(base) id:~$ unzip ijava-1.3.0.zip # unzip downloaded IJava kernel
(base) id:~$ python install.py --user # install IJava kernel
(base) id:~$ jupyter kernelspec list # list kernels
Available kernels:
java /home/shay/.local/share/jupyter/kernels/java
python3 /home/shay/.local/share/jupyter/kernels/python3
Console Game Menu
College Boards Units #1, #3, and #4 and Free Response Methods and Control Structures are built into these labs. Of course, these games are very popular in beginning programming. They are here for reference, as they were shared by a student.
import java.util.Scanner; //library for user input
import java.lang.Math; //library for random numbers
public class ConsoleGame {
public final String DEFAULT = "\u001B[0m"; // Default Terminal Color
public ConsoleGame() {
Scanner sc = new Scanner(System.in); // using Java Scanner Object
boolean quit = false;
while (!quit) {
this.menuString(); // print Menu
try {
int choice = sc.nextInt(); // using method from Java Scanner Object
System.out.print("" + choice + ": ");
quit = this.action(choice); // take action
} catch (Exception e) {
sc.nextLine(); // error: clear buffer
System.out.println(e + ": Not a number, try again.");
}
}
sc.close();
}
public void menuString(){
String menuText = ""
+ "\u001B[35m___________________________\n"
+ "|~~~~~~~~~~~~~~~~~~~~~~~~~|\n"
+ "|\u001B[0m Menu! \u001B[35m|\n"
+ "|~~~~~~~~~~~~~~~~~~~~~~~~~|\n"
+ "| 0 - Exit |\n"
+ "| 1 - Rock Paper Scissors |\n"
+ "| 2 - Higher or Lower |\n"
+ "| 3 - Tic Tac Toe |\n"
+ "|_________________________| \u001B[0m\n"
+ "\n"
+ "Choose an option.\n"
;
System.out.println(menuText);
}
private boolean action(int selection) {
boolean quit = false;
switch (selection) { // Switch or Switch/Case is Control Flow statement and is used to evaluate the user selection
case 0:
System.out.print("Goodbye, World!");
quit = true;
break;
case 1:
rps();
break;
case 2:
horl();
break;
case 3:
ticTacToe();
break;
default:
//Prints error message from console
System.out.print("Unexpected choice, try again.");
}
System.out.println(DEFAULT); // make sure to reset color and provide new line
return quit;
}
public void horl(){
System.out.println("Higher or Lower");
System.out.println("You have three guesses to guess the number I am thinking of between 1-8.");
System.out.println("If you guess the number correctly, you win!");
Scanner scHL = new Scanner(System.in);
int randomG = (int) (Math.random() * 8) + 1;
int guess = scHL.nextInt();
for(int i = 3; i > 0; i--){
if(guess == randomG){
System.out.println("You win!");
break;
}
else if(guess > randomG){
System.out.println("The number is lower");
}
else if(guess < randomG){
System.out.println("The number is higher");
}
guess = scHL.nextInt();
}
System.out.println("Game over.");
scHL.close();
}
public void rps(){
System.out.println("Rock Paper Scissors");
System.out.println("Type r for rock, p for paper, or s for scissors");
Scanner scRPS = new Scanner(System.in);
String userChoice = scRPS.nextLine().toLowerCase();
Boolean quit = false;
int random = (int) (Math.random() * 3);
while(quit == false){
if(userChoice.equals("r")){
if(random == 1){
System.out.println("You chose rock \nThe computer chose paper \nYou lose!");
}
else if(random == 2){
System.out.println("You chose rock \nThe computer chose scissors \nYou win!");
}
else{
System.out.println("You chose rock \nThe computer chose rock \nIt's a tie!");
}
quit = true;
}
else if(userChoice.equals("p")){
if(random == 1){
System.out.println("You chose paper \nThe computer chose paper \nIt's a tie!");
}
else if(random == 2){
System.out.println("You chose paper \nThe computer chose scissors \nYou lose!");
}
else{
System.out.println("You chose paper \nThe computer chose rock \nYou win!");
}
quit = true;
}
else if(userChoice.equals("s")){
if(random == 1){
System.out.println("You chose scissors \nThe computer chose paper \nYou win!");
}
else if(random == 2){
System.out.println("You chose scissors \nThe computer chose scissors \nIt's a tie!");
}
else{
System.out.println("You chose scissors \nThe computer chose rock \nYou lose!");
}
quit = true;
}
else{
System.out.println("Invalid input, try again");
userChoice = scRPS.nextLine();
}
}
scRPS.close();
}
public void ticTacToe(){
System.out.println("Tic Tac Toe");
Scanner scTTT = new Scanner(System.in);
String[] board = {"1", "2", "3", "4", "5", "6", "7", "8", "9"};
String player = "X";
String player2 = "O";
int turn = 0;
Boolean quit = false;
System.out.println("Do you want to play against a friend or the computer?");
System.out.println("Type 1 for friend, 2 for computer");
int choice = scTTT.nextInt();
//make tic tac toe using player1 and player2
if(choice == 1){
System.out.println("Type the number of the square you want to place your piece in");
while(quit == false){
System.out.println("Player 1's turn (X)");
System.out.println(board[0] + " | " + board[1] + " | " + board[2]);
System.out.println(board[3] + " | " + board[4] + " | " + board[5]);
System.out.println(board[6] + " | " + board[7] + " | " + board[8]);
int move = scTTT.nextInt();
if(board[move - 1].equals("X") || board[move - 1].equals("O")){
System.out.println("That square is already taken, try again");
}
else{
board[move - 1] = player;
turn++;
if(board[0].equals("X") && board[1].equals("X") && board[2].equals("X")){
System.out.println("Player 1 wins!");
quit = true;
}
else if(board[3].equals("X") && board[4].equals("X") && board[5].equals("X")){
System.out.println("Player 1 wins!");
quit = true;
}
else if(board[6].equals("X") && board[7].equals("X") && board[8].equals("X")){
System.out.println("Player 1 wins!");
quit = true;
}
else if(board[0].equals("X") && board[3].equals("X") && board[6].equals("X")){
System.out.println("Player 1 wins!");
quit = true;
}
else if(board[1].equals("X") && board[4].equals("X") && board[7].equals("X")){
System.out.println("Player 1 wins!");
quit = true;
}
else if(board[2].equals("X") && board[5].equals("X") && board[8].equals("X")){
System.out.println("Player 1 wins!");
quit = true;
}
else if(board[0].equals("X") && board[4].equals("X") && board[8].equals("X")){
System.out.println("Player 1 wins!");
quit = true;
}
else if(board[2].equals("X") && board[4].equals("X") && board[6].equals("X")){
System.out.println("Player 1 wins!");
quit = true;
}
else if(turn == 9){
System.out.println("It's a tie!");
quit = true;
}
else{
System.out.println("Player 2's turn (O)");
System.out.println(board[0] + " | " + board[1] + " | " + board[2]);
System.out.println(board[3] + " | " + board[4] + " | " + board[5]);
System.out.println(board[6] + " | " + board[7] + " | " + board[8]);
int move2 = scTTT.nextInt();
if(board[move2 - 1].equals("X") || board[move2 - 1].equals("O")){
System.out.println("That square is already taken, try again");
}
else{
board[move2 - 1] = player2;
turn++;
if(board[0].equals("O") && board[1].equals("O") && board[2].equals("O")){
System.out.println("Player 2 wins!");
quit = true;
}
else if(board[3].equals("O") && board[4].equals("O") && board[5].equals("O")){
System.out.println("Player 2 wins!");
quit = true;
}
else if(board[6].equals("O") && board[7].equals("O") && board[8].equals("O")){
System.out.println("Player 2 wins!");
quit = true;
}
else if(board[0].equals("O") && board[3].equals("O") && board[6].equals("O")){
System.out.println("Player 2 wins!");
quit = true;
}
else if(board[1].equals("O") && board[4].equals("O") && board[7].equals("O")){
System.out.println("Player 2 wins!");
quit = true;
}
else if(board[2].equals("O") && board[5].equals("O") && board[8].equals("O")){
System.out.println("Player 2 wins!");
quit = true;
}
}
}
}
}
}
if(choice == 2){
String computer = "O";
System.out.println("Type the number of the square you want to place your piece in");
while(quit == false){
System.out.println("Player 1's turn (X)");
System.out.println(board[0] + " | " + board[1] + " | " + board[2]);
System.out.println(board[3] + " | " + board[4] + " | " + board[5]);
System.out.println(board[6] + " | " + board[7] + " | " + board[8]);
int move = scTTT.nextInt();
if(board[move - 1].equals("X") || board[move - 1].equals("O")){
System.out.println("That square is already taken, try again");
}
else{
board[move - 1] = player;
turn++;
if(board[0].equals("X") && board[1].equals("X") && board[2].equals("X")){
System.out.println("Player 1 wins!");
quit = true;
}
else if(board[3].equals("X") && board[4].equals("X") && board[5].equals("X")){
System.out.println("Player 1 wins!");
quit = true;
}
else if(board[6].equals("X") && board[7].equals("X") && board[8].equals("X")){
System.out.println("Player 1 wins!");
quit = true;
}
else if(board[0].equals("X") && board[3].equals("X") && board[6].equals("X")){
System.out.println("Player 1 wins!");
quit = true;
}
else if(board[1].equals("X") && board[4].equals("X") && board[7].equals("X")){
System.out.println("Player 1 wins!");
quit = true;
}
else if(board[2].equals("X") && board[5].equals("X") && board[8].equals("X")){
System.out.println("Player 1 wins!");
quit = true;
}
else if(board[0].equals("X") && board[4].equals("X") && board[8].equals("X")){
System.out.println("Player 1 wins!");
quit = true;
}
else if(board[2].equals("X") && board[4].equals("X") && board[6].equals("X")){
System.out.println("Player 1 wins!");
quit = true;
}
else if(turn == 9){
System.out.println("It's a tie!");
quit = true;
}
else{
System.out.println("Computer's turn (O)");
System.out.println(board[0] + " | " + board[1] + " | " + board[2]);
System.out.println(board[3] + " | " + board[4] + " | " + board[5]);
System.out.println(board[6] + " | " + board[7] + " | " + board[8]);
int move2 = (int)(Math.random() * 9) + 1;
if(board[move2 - 1].equals("X") || board[move2 - 1].equals("O")){
System.out.println("That square is already taken, try again");
}
else{
board[move2 - 1] = computer;
turn++;
if(board[0].equals("O") && board[1].equals("O") && board[2].equals("O")){
System.out.println("Computer wins!");
quit = true;
}
else if(board[3].equals("O") && board[4].equals("O") && board[5].equals("O")){
System.out.println("Computer wins!");
quit = true;
}
else if(board[6].equals("O") && board[7].equals("O") && board[8].equals("O")){
System.out.println("Computer wins!");
quit = true;
}
else if(board[0].equals("O") && board[3].equals("O") && board[6].equals("O")){
System.out.println("Computer wins!");
quit = true;
}
else if(board[1].equals("O") && board[4].equals("O") && board[7].equals("O")){
System.out.println("Computer wins!");
quit = true;
}
else if(board[2].equals("O") && board[5].equals("O") && board[8].equals("O")){
System.out.println("Computer wins!");
quit = true;
}
}
}
}
}
}
scTTT.close();
}
static public void main(String[] args) {
new ConsoleGame(); // starting Menu object
}
}
ConsoleGame.main(null);
[35m___________________________
|~~~~~~~~~~~~~~~~~~~~~~~~~|
|[0m Menu! [35m|
|~~~~~~~~~~~~~~~~~~~~~~~~~|
| 0 - Exit |
| 1 - Rock Paper Scissors |
| 2 - Higher or Lower |
| 3 - Tic Tac Toe |
|_________________________| [0m
Choose an option.
1: Rock Paper Scissors
Type r for rock, p for paper, or s for scissors
You chose rock
The computer chose rock
It's a tie!
[0m
[35m___________________________
|~~~~~~~~~~~~~~~~~~~~~~~~~|
|[0m Menu! [35m|
|~~~~~~~~~~~~~~~~~~~~~~~~~|
| 0 - Exit |
| 1 - Rock Paper Scissors |
| 2 - Higher or Lower |
| 3 - Tic Tac Toe |
|_________________________| [0m
Choose an option.
0: Goodbye, World![0m
Hacks
To start the year, I want you to consider a simple Java console game or improve on the organization and presentation of the games listed.
- Make RPS, Tic-Tack-Toe, and Higher Lower into different cells and objects. Document each cell in Jupyter Notebooks.
- Simplify logic, particularly T-T-T. What could you do to make this more simple? Java has HashMap (like Python Dictionary), Arrays (fixed size), ArraLists (Dynamic Size).
- Run the menu using recursion versus while loop. Try to color differently.
- Look over 10 units for College Board AP Computer Science A. In your reorganized code blocks and comments identify the Units of Code Used.
- Answer why you think this reorganization and AP indetification is important?
import java.util.Scanner;
import java.util.Random;
public class Hangman {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
Random random = new Random();
String[] words = {"apple", "banana", "orange", "strawberry", "grapefruit"};
boolean playing = true;
while (playing) {
System.out.println("Let's play Hangman!");
int randomIndex = random.nextInt(words.length);
char[] randomWord = words[randomIndex].toCharArray();
int wordLength = randomWord.length;
char[] playerGuess = new char[wordLength];
for (int i = 0; i < playerGuess.length; i++) {
playerGuess[i] = '_';
}
boolean wordIsGuessed = false;
int tries = 0;
while (!wordIsGuessed && tries != wordLength) {
System.out.println("Current guesses: ");
printArray(playerGuess);
System.out.printf("You have %d tries left.\n", wordLength - tries);
System.out.println("Enter a single character: ");
char input = scanner.nextLine().charAt(0);
tries++;
if (input == '-') {
playing = false;
wordIsGuessed = true;
} else {
for (int i = 0; i < randomWord.length; i++) {
if (randomWord[i] == input) {
playerGuess[i] = input;
}
}
if (isTheWordGuessed(playerGuess)) {
wordIsGuessed = true;
System.out.println("Congratulations! You won!");
}
}
}
if (!wordIsGuessed) {
System.out.println("You ran out of guesses.");
}
System.out.println("Do you want to play again? (yes/no)");
String anotherGame = scanner.nextLine();
if (anotherGame.equals("no")) playing = false;
}
System.out.println("Game over.");
}
public static void printArray(char[] array) {
for (int i = 0; i < array.length; i++) {
System.out.print(array[i] + " ");
}
System.out.println();
}
public static boolean isTheWordGuessed(char[] array) {
for (int i = 0; i < array.length; i++) {
if (array[i] == '_') return false;
}
return true;
}
}
