Java Recursion In Minesweeper Game

Nov 16, 2014

Recursion in a MineSweeper game. So far, when a user clicks on a square and it has a bomb on it, I reveal the bomb to the user - see clicked(). I also have the ability to show the user if the squares surrounding them have any adjacent bombs - see countAdjacentSquares().

However, I am having trouble with my fillZeros() recursive method. When a user clicks on a square that has zero bombs in its surrounding squares, it not only reveals that square, but also any adjacent squares (horizontally, vertically or diagonally adjacent) that also have zero bombs in its surrounding squares.

I don't have any recursion, if I click on a square with no bombs all it does it set the square to 0, but doesn't continue to check for other empty squares.

Java Code:

import javax.swing.*;
import java.awt.*;
import java.util.*;
public class Square extends GameSquare
{
private boolean revealed = false;
private boolean squareHasBomb = false;
public static final int MINE_PROBABILITY = 10;
public int mineCount = 0;

[Code] ....

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Minesweeper - Print Out MxN Game And Neighboring Bomb Counts

Jan 17, 2015

/*****************************************************************
* Creates an MxN minesweeper game where each cell is a bomb with probability p.
* Prints out the MxN game and the neighboring bomb counts.
*
* Sample execution:
*
* % java Minesweeper 5 10 0.3
* * . . . . . . . . *
* . . . . . . * . . .
* . . . . . . . . * *
* . . . * * * . . * .
* . . . * . . . . . .
*
* * 1 0 0 0 1 1 1 1 *
* 1 1 0 0 0 1 * 2 3 3
* 0 0 1 2 3 3 2 3 * *
* 0 0 2 * * * 1 2 * 3
* 0 0 2 * 4 2 1 1 1 1
*
*
*************************************************************************/
  
public class MineSweeper
{
 public static void main(String[] args)
{
int n = Integer.parseInt(args[0]); //columns
int s = Integer.parseInt(args[1]); //rows
int p = Integer.parseInt(args[2]); //max number of bombs
 
[Code] .....

Console:

. . * . *
. * . . .
. . * . *
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: -1
at Stefan.Minesweeper.main(Minesweeper.java:85)

Every time the compiler shows me this Array Index Out Of Bounds and shows me in the witch line i have error but i just don't get it how to fixed it and why compiler printing me this mistake because there is enough space in array field[][] because i provided a n+2 X s+2 fields in array and i am using just 1 to n ,including and 1 to s ,including m, so i have not used fields from field[0][0] to field[0][s+1] and field[0][0] to field[n+1][0], field[n+1][0] to field[n+1][s+1] ,field[n+1][s+1] to field[0][s+1] ,so i suppose i can check their values and do not get out of array bounds,but compiler claims otherwise!!!

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Unable To Fill Blank Squares On Minesweeper Game

Nov 12, 2014

I'm having trouble filling in the blank squares on a Minesweeper game. What I am trying to is, if a user clicks a square and that square(s) does not have a bomb in it, or adjacent to it, should be set to an empty square.

Here's my recursive method below:

public void revealZeros(){
for(int x = -1; x <= 1; x++)
for (int y = -1; y <= 1; y++){
Square zeroSquare = (Square)board.getSquareAt(xLocation+x, yLocation+y);
if (!(zeroSquare.SquareHasBomb)){
setImage("images/empty.jpg");
}
}
revealZeros();
}

I am traversing around the square that the user clicks on with the use of two for-loops. Getting the square at that location and then applying an empty square image. On that square.

The function should then recurse itself and go onto the next square, if the next square does not have a bomb or does not have an adjacent bomb.

I keep on getting an infinite recursion problem

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Jul 16, 2014

The program I'm working on is supposed to read input from a file and using recursion, print the pattern of asterisks for each value until the value is either < 0 or > 25. For example, if the value was 4, the pattern would look like this
 
*
* *
* * *
* * * *
* * *
* *
*
 
The values are stored in a file entitled prog3.dat which looks like this
 
4
3
15
26
0
 
I've never used recursion before and haven't been able to find anything showing how it would work with this particular type of problem. Here is what I've been able to come up with so far, but I'm having problems still which I will show following the code.
 
import java.util.Scanner; 
import java.io.*;
public class Program3 {
public static void main(String[] args) throws Exception {
int num = 0;
java.io.File file = new java.io.File("../instr/prog3.dat");
Scanner fin = new Scanner(file);

[Code] ....
 
Output:
 
Please enter an integer
*
* *
* * *
* * * *
Please enter an integer
*
* *
* * *
Please enter an integer
 
*
* *
* * *
* * * *
* * * * *
* * * * * *
* * * * * * *
* * * * * * * *
* * * * * * * * *
* * * * * * * * * *
* * * * * * * * * * *
* * * * * * * * * * * *
* * * * * * * * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * * *
Please enter an integer
Please enter an integer
 
As you can see, I don't know how to make it print the pattern like in the example and am honestly not even sure if this is recursion since I've never actually worked with recursion before.

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Apr 26, 2015

I was asked to create a word pyramid program using recursion. I understand the concept of recursion (i.e. a method calling itself with the problem it is solving getting simpler and simpler each time) but I am having issues writing the program. Here is my code:

public static void main(String[] args) {
//This program will create a word pyramid by using a recursive algorithm.
//For example, the output of "DOGGY" should be:
//DOGGY
//OGG
//G
//This program will also use a recursive algorithm to accomplish this.
String userWord = JOptionPane.showInputDialog(null, "Hello and welcome to the Word Pyramid program."

[Code] .....

So, if I input HORSE the output should be:

HORSE
ORS
R

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Mar 15, 2015

So I have to design a program that takes a word and reverses the order of it. The exact directions are:Write a recursive method void reverse() that reverses a sentence. For example:

[code = Java]
Sentence greeting = new Sentence("Hello!");
greeting.reverse();
System.out.println(greeting.getText());
[/code]
prints the string "!olleH".

Implement a recursive solution by removing the first character, reversing a sentence consisting of the remaining text, and combining the two. So basically my biggest issue is my method to actually reverse the word.

public class Sentance
{
private String Word;
public Sentance (String aWord)
{
Word = aWord;

[code]....

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This is what I have so far:

public static void main(String[args]){
int size = kbd.nextInt();
int [] myArray = new int [size]
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void print2(int n){
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out.printf(" %d",-1);
return;
}
out.printf(" %d", n);
print2(n-1)
out.printf(" %d", n);
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import java.util.Scanner;
class Question1{
public static void main(String[]args){
Scanner s = new Scanner(System.in);
int size, sum;
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[Code] .....

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[Code] ....

I have similar code that I stepped through in a debugger. After running the code I found that it built the desired tree, in this case a root node H with left child L and right child P. I want list of lists to contain all paths from root to leaf. I expected [H, L] and [H, P]. I discovered that statefulPath is not stateful; after a recursive stack frame pops, statefulPath still contains n! But that stack frame just popped! I expected to see statefulPath be [H] in the debugger and it was [H, L]! So I later have a list [H,L,P] which I don't want. How do I make the statefulPath list I want for my algorithm?

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[code]...

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import java.awt.*;
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Here's the code:

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[Code] ....

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The program I'm working on is supposed to read input from a file and using recursion, print the pattern of asterisks for each value until the value is either < 0 or > 25.For example, if the value was 4, the pattern would look like this

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[code]...

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