Cornelius Eanes's Programming Portal
Assignments (Random Numbers)
[53] Randomness
Goal: Learn how to generate random numbers in Java.
/// Name: Cornelius Eanes
/// Period: 5
/// Program Name: Randomness
/// File Name: Randomness.java
/// Date Finished: Oct 26, 2015
import java.util.Random;
public class Randomness {
public static void main(String[] args) {
// Random has a constructor that accepts an integer. This is called a seed, and will
// generate the same sequence of "random numbers" every time. Passing no parameters
// will instead use a random seed.
Random r = new Random();
int x = 1 + r.nextInt(10);
System.out.println("My random number is " + x);
// The parameter passed in the Random#nextInt(int) method determines the upward bounds
// of the range of numbers it can generate. So passing in 5 would have the range be [0,4].
System.out.println("Here are some numbers from 3 to 7!");
System.out.print(3 + r.nextInt(5) + " ");
System.out.print(3 + r.nextInt(5) + " ");
System.out.print(3 + r.nextInt(5) + " ");
System.out.print(3 + r.nextInt(5) + " ");
System.out.print(3 + r.nextInt(5) + " ");
System.out.print(3 + r.nextInt(5) + " ");
System.out.println();
System.out.println("Here are some numbers from 1 to 100!");
System.out.print(1 + r.nextInt(100) + "\t");
System.out.print(1 + r.nextInt(100) + "\t");
System.out.print(1 + r.nextInt(100) + "\t");
System.out.print(1 + r.nextInt(100) + "\t");
System.out.print(1 + r.nextInt(100) + "\t");
System.out.print(1 + r.nextInt(100) + "\t");
System.out.println();
// In this example, the range generated will be [0,9], but because of the addition of a
// one, the range will now be [1,10].
int num1 = 1 + r.nextInt(10);
int num2 = 1 + r.nextInt(10);
// Has a 1/10 chance of being true.
if (num1 == num2)
{
System.out.println("The random numbers were the same! Weird.");
}
if (num1 != num2)
{
System.out.println("The random numbers were different! Not too surprising, actually.");
}
}
}
Output
[54] Magic 8 Ball
Goal: Create a fully-functioning virtual magic 8 ball.
/// Name: Cornelius Eanes
/// Period: 5
/// Program Name: Magic 8 Ball
/// File Name: MagicEightBall.java
/// Date Finished: Oct 26, 2015
import java.util.Random;
public class MagicEightBall {
public static void main(String[] args) {
Random rand = new Random();
String response;
int choice = rand.nextInt(20);
if (choice == 0) {
response = "It is certain";
} else if (choice == 1) {
response = "It is decidedly so";
} else if (choice == 2) {
response = "Without a doubt";
} else if (choice == 3) {
response = "Yes - definitely";
} else if (choice == 4) {
response = "You may rely on it";
} else if (choice == 5) {
response = "As I see it, yes";
} else if (choice == 6) {
response = "Most likely";
} else if (choice == 7) {
response = "Outlook good";
} else if (choice == 8) {
response = "Signs point to yes";
} else if (choice == 9) {
response = "Yes";
} else if (choice == 10) {
response = "Reply hazy, try again";
} else if (choice == 11) {
response = "Ask again later";
} else if (choice == 12) {
response = "Better not tell you now";
} else if (choice == 13) {
response = "Cannot predict now";
} else if (choice == 14) {
response = "Concentrate and ask again";
} else if (choice == 15) {
response = "Don't count on it";
} else if (choice == 16) {
response = "My reply is no";
} else if (choice == 17) {
response = "My sources say no";
} else if (choice == 18) {
response = "Outlook not so good";
} else if (choice == 19) {
response = "Very doubtful";
} else {
response = "You've broken the universe. All is lost.";
}
System.out.println("MAGIC 8 BALL SAYS: " + response);
}
}
Output
[55] A Number-Guessing Game
Goal: Create a number-guessing game with the correct number being random.
/// Name: Cornelius Eanes
/// Period: 5
/// Program Name: Number Guessing Game
/// File Name: NumberGuessingGame.java
/// Date Finished: Oct 26, 2015
import java.util.Random;
import java.util.Scanner;
public class NumberGuessingGame {
public static void main(String[] args) {
Random rand = new Random();
Scanner input = new Scanner(System.in);
int correct = rand.nextInt(10) + 1, guess;
System.out.println("I'm thinking of a number from 1 to 10.");
System.out.print("Your guess: ");
guess = input.nextInt();
System.out.println();
if (correct == guess) {
System.out.println("That's right! My secret number was " + correct + ".");
} else {
System.out.println("Sorry, but I was really thinking of " + correct + ".");
}
}
}
Output
[56] Fortune Cookie
Goal: Generate a fortune cookie with a random fortune and random lucky numbers.
/// Name: Cornelius Eanes
/// Period: 5
/// Program Name: Fortune Cookie
/// File Name: FortuneCookie.java
/// Date Finished: Oct 26, 2015
import java.util.Random;
public class FortuneCookie {
public static void main(String[] args) {
Random rand = new Random();
String fortune = "";
int randNum = rand.nextInt(6);
if (randNum == 0) {
fortune = "Respect will come to you when you respect others";
} else if (randNum == 1) {
fortune = "You will go somewhere new soon";
} else if (randNum == 2) {
fortune = "Stick close to your friends";
} else if (randNum == 3) {
fortune = "Help! I'm held hostage at Wong's Fortune Cookie Factory!";
} else if (randNum == 4) {
fortune = "A random act of kindness will repay itself";
} else if (randNum == 5) {
fortune = "An exciting opportunity will present itself";
}
System.out.println("Fortune cookie says: " + fortune);
System.out.println("\t" +
(1 + rand.nextInt(54)) + " - " +
(1 + rand.nextInt(54)) + " - " +
(1 + rand.nextInt(54)) + " - " +
(1 + rand.nextInt(54)) + " - " +
(1 + rand.nextInt(54)) + " - " +
(1 + rand.nextInt(54))
);
}
}
Output
[57] Dice
Goal: Roll two virtual dice and get their sum.
/// Name: Cornelius Eanes
/// Period: 5
/// Program Name: Dice
/// File Name: Dice.java
/// Date Finished: Oct 26, 2015
import java.util.Random;
public class Dice {
public static void main(String[] args) {
Random rand = new Random();
int i1 = rand.nextInt(6) + 1;
int i2 = rand.nextInt(6) + 1;
System.out.println("HERE COMES THE DICE!");
System.out.println();
System.out.println("Roll #1: " + i1);
System.out.println("Roll #2: " + i2);
System.out.println("The total is " + (i1 + i2) + "!");
}
}
Output
[58] One Shot Hi-Lo
Goal: Another number guessing game with output showing in you were too high or low.
/// Name: Cornelius Eanes
/// Period: 5
/// Program Name: One Shot Hi-Lo
/// File Name: OneShotHiLo.java
/// Date Finished: Nov 09, 2015
import java.util.Random;
import java.util.Scanner;
public class OneShotHiLo {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
Random rand = new Random();
int randNumber = 1 + rand.nextInt(100), guess;
System.out.print("I'm thinking of a number between 1-100. Guess what it is.\n> ");
guess = input.nextInt();
if (guess > randNumber) {
System.out.println("Sorry, you are too high. I was thinking of " + randNumber + ".");
} else if (guess < randNumber) {
System.out.println("Sorry, you are too low. I was thinking of " + randNumber + ".");
} else {
System.out.println("You guessed it! It was " + randNumber + ".");
}
}
}
Output
[59] Three Card Monte
Goal: Create game that has a Three Card Monte situation.
/// Name: Cornelius Eanes
/// Period: 5
/// Program Name: Three-Card Monte
/// File Name: ThreeCardMonte.java
/// Date Finished: Nov 09, 2015
import java.util.Random;
import java.util.Scanner;
public class ThreeCardMonte {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
Random rand = new Random();
int correct = 1 + rand.nextInt(3), guess;
System.out.println("Three cups are placed in front of you. One of them has a ball in it.");
System.out.println();
System.out.println("Which one has the ball?");
System.out.println();
System.out.println(" ## ## ##");
System.out.println(" #### #### ####");
System.out.println(" #### #### ####");
System.out.println(" 1 2 3");
System.out.println();
System.out.print("> ");
guess = input.nextInt();
System.out.println();
if (guess == correct) {
System.out.println("You are correct! The ball was under cup #" + correct + ".");
} else {
System.out.println("You are incorrect! The was under cup #" + correct + ".");
}
System.out.println();
System.out.println(" ## ## ##");
if (correct == 1) {
System.out.println(" #@@# #### ####");
System.out.println(" #@@# #### ####");
} else if (correct == 2) {
System.out.println(" #### #@@# ####");
System.out.println(" #### #@@# ####");
} else {
System.out.println(" #### #### #@@#");
System.out.println(" #### #### #@@#");
}
System.out.println(" 1 2 3");
}
}
Output
