Running Craps Game Using Methods?

Nov 4, 2014

I had to make a program that ran a craps game using methods and I keep getting an error ....

Here is my code :

public class CrapsGame {
public static void main(String[] args) { 
System.out.println(playGame());
}//end of main method
public static int rollDie(int n){
return (int)(Math.random()*n)+ 1;
}//end of rollDie method

[Code] .....

And this is the error im getting

Exception in thread "main" java.lang.RuntimeException: Uncompilable source code - variable roll might not have been initialized
at CrapsGame.playGame(CrapsGame.java:29)
at CrapsGame.main(CrapsGame.java:4)
Java Result: 1

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Snake Eyes / Craps Dice Games

Jul 24, 2014

I am having a problem with my java program. My goal is to request the user to enter how many times they want to roll a pair of dices. Each dice have numbers 1-6. When rolling the dices, I randomly pick a number from each dice and total the number. My goal is to calculate the number of times snake-eyes was rolled which is a total of 2 and total number of times a total of 7 was rolled. Here is my code. I am calling the rollDice method to perform the random pick and calculations. The error I am getting is at the bottom of the code.

package dice;
import java.util.Scanner;
import java.util.Random;
public class Dice
{
public static void main(String[] args)
{
int numRolls; // number of rolls

[code]...

How many times would you like to roll the two dice? 1000 Exception in thread "main" java.lang.NullPointerException at dice.Dice.main(Dice.java:40)
Java Result: 1 BUILD SUCCESSFUL (total time: 4 seconds)

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Java Game - Breaking Down A Method To Smaller Methods And Where To Call

Aug 6, 2014

I have a question about a method I have. In my game, I had a move method to move my player left and right, and originally this method was huge, as it also took care checking collisions and a few other things. I broke it up a bit and put the collisions in their own methods and call them from again another method... Here is an extract which I hope illustrates my point:

private static final double MOVE_SPEED = 0.2;
private static final double MAX_MOVE_SPEED = 3.5;
private static final double STOP_SPEED = 0.18;
private double xPos;
private double yPos;

[Code] .....

Something I thought might be a good idea is to check the direction collision when im doing the calculations for that direction:

if(moveLeft) {
dx -= MOVE_SPEED;
(dx < -MAX_MOVE_SPEED) {
dx = -MAX_MOVE_SPEED;
}
checkLeft();
}

But then I would also need to check it when I'm slowing down the left movement:

if(dx < 0.0) {
dx += STOP_SPEED;
if(dx > 0.0) {
dx = 0.0;
}
checkLeft();
}

Then I thought instead i can check it after both of these steps:

if(moveLeft || dx < 0.0) {
checkLeft();
}

I guess my question is quite general: How much is acceptable to break up a method? How many chains of method calls is acceptable? Is it ok to call the same method from different nearby places?

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Apr 25, 2014

I will try to explain what i want to code , a HiLo game where the user can choose up to 3 different levels(1-10, 1-100, 1-1000) with these 3 methods

public static void main(String[] args) {...}
public static int playGame(int maxNumber) {...}
public static void giveResponse(int answer, int guess) {...}

with no Random , i will use the:

int number = (int)(Math.random() * max) +1; to generate numbers

I have tried so many times , but i don't get it ....

My code so far :

import java.util.Scanner;
public class HL{
public static void main(String[] args ){
Scanner s = new Scanner(System.in);

[Code] ....

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May 19, 2014

This is my program: RemoteXMLRead.java

import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.DocumentBuilder;
import org.apache.commons.io.filefilter.WildcardFileFilte r;
import org.w3c.dom.Document;
import org.w3c.dom.NodeList;
import org.w3c.dom.Node;
import org.w3c.dom.Element;
import java.io.File;

[code]....

It is working fine when i run in Eclipse, but is giving error when i run in cmd.. What i need to do to over come this..

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Opoly Game - Goal Of The Game Is To Reach Or Exceed Reward Value 1000

Mar 12, 2015

Opoly works this way: The board is a circular track of variable length (the user determines the length when the game app runs). There is only one player, who begins the game at position 0.

Thus, if the board length is 20, then the board locations start at position 0 and end at position 19. The player starts with a reward of 100, and the goal of the game is to reach or exceed reward value 1000. When this reward value is reached or exceeded, the game is over. When the game ends, your program should report the number of turns the player has taken, and the final reward amount attained.

In Opoly the game piece advances via a spinner - a device that takes on one of the values 1, 2, 3, 4, 5 at random, with each of the five spin values equally likely.

Although the board is circular, you should draw the state of the board as a single "line", using an 'o' to represent the current player position, and * represent all other positions. Thus if the board size is 10, then this board drawing:

**o******

means that the player is at location 2 on the board.

Here are the other Opoly game rules:

If your board piece lands on a board cell that is evenly divisible by 7, your reward doubles.

If you land on the final board cell, you must go back 3 spaces. Thus if the board size is 20, the last position is position 19, and if you land there, you should go back to position 16. (If the position of the last cell is evenly divisible by 7, no extra points are added, but if the new piece location, 3 places back, IS evenly divisible by 7, then extra points ARE added).

If you make it all the way around the board, you get 100 points. Note that if you land exactly on location 0, you first receive 100 extra points (for making it all the around), and then your score is doubled, since 0 is evenly divisible by 7,

Every tenth move (that is, every tenth spin of the spinner, move numbers 10,20,30,... etc.), reduces the reward by 50 points. This penalty is applied up front, as soon as the 10th or 20th or 30th move is made, even if other actions at that instant also apply. Notice that with this rule it's possible for the reward amount to become negative.

Here is the driver class for the game:

import java.util.*;
public class OpolyDriver{
public static void main(String[] args){
System.out.println("Enter an int > 3 - the size of the board");
Scanner s = new Scanner(System.in);
int boardSize = s.nextInt();

[Code] ....

heres the methods:

REQUIRED CODE STRUCTURE: Your Opoly class must include the following methods (in addition to the Opoly constructor) and must implement the method calls as specified:

playGame - The top-level method that controls the game. No return value, no parameters. Must call drawBoard, displayReport, spinAndMove, isGameOver.

spinAndMove - spins the spinner and then advances the piece according to the rules of the game. No return value, no parameters. Must call spin and move.

spin - generates an integer value from 1 to 5 at random- all equally likely. Returns an integer, no parameters.

move - advances the piece according to the rules of the game. No return value, takes an integer parameter that is a value from 1 to 5.

isGameOver - checks if game termination condition has been met. Returns true if game is over, false otherwise. No parameters.

drawBoard - draws the board using *'s and an o to mark the current board position. Following each board display you should also report the current reward. No return value, no parameters.

displayReport - reports the end of the game, and gives the number of rounds of play, and the final reward. No return value, no parameters.

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May 9, 2015

Im trying to make a tic tac toe game that you play against the computer using a random number generator and two dimensional arrays for the game board. Im not trying to make a GUI, the assignment is to have the board in the console, which I have done. I have run into a few problems with trying to get the computer player to correctly generate 2 integers and have those two integers be a place on the game board. Here is my code so far.

import java.util.Random;
import java.util.Scanner;
 public class TicTacToe {
 private static Scanner keyboard = new Scanner(System.in);
private static char[][] board = new char[3][3];
public static int row, col;
 
[Code] ....

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May 3, 2015

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class Menu {
public static void main(String args[])
throws java.io.IOException {
char choice;
do {

[code]....

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Oct 2, 2014

I tried this program, its guessing game. Where program decide 1 number and user will guess number. I am getting 1 problem. When user want to play game again.the random number remain same. So where i can put reset random in code..? And 1 more question if I want to write driver code for this. What should i transfer to driver code.

import java.util.Random;
import java.util.Scanner;
public class GuessGame {
public static void main(String args[])
{
String choice="y";

[Code] ......

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Jun 11, 2014

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Feb 17, 2014

I have a directories in UNIX:

/home/t_bmf/Java/HelloWorld/src/helloworld :will contain a .java file
/home/t_bmf/Java/HelloWorld/bin :will contain all .class file

Let say a have a code:

package helloworld;
public class HelloWorld {
public static void main(String[] arg) {
System.out.println("Hello World");
}
}

a command to compile this even outside the directory /home/t_bmf/Java/HelloWorld/src/helloworld
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This will generate a directory /home/t_bmf/Java/HelloWorld/bin/helloworld and file inside this is HelloWorld.class

To run this program I must be in directory /home/t_bmf/Java/HelloWorld/bin and using this command:

java helloworld.HelloWorld

Question:

I already how to run the HelloWorld.class, but I must be in helloworld /home/t_bmf/Java/HelloWorld/bin to run it. Is there's a way to run the class even when I am not in directory /home/t_bmf/Java/HelloWorld/bin? Let's say I'm in /home/t_bmf, can I still run the HelloWorld.class?

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Jun 11, 2014

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Here is the code:

public class FallingBalls extends JApplet implements KeyListener,
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boolean win;
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[code]....

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Nov 23, 2014

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at java.awt.Container.addImpl(Unknown Source)
at java.awt.Container.add(Unknown Source)
at Input.buildPanel(Input.java:53)
at Input.<init>(Input.java:27)
at InputDemo.main(InputDemo.java:5)

I've created two classes

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[code]....

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Mar 30, 2014

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The gui is going to be using a javaw.exe as well and I don't want to end the entire thing.

I just want to end the javaw.exe process that is running the other jar file.

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[Code] .....

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Apr 24, 2014

import acm.util.* ;
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[Code] ....

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