Snake Game in Java

[Shyamz1]

Hello there how are you all. I am trying to make a Snake Game in Java and have managed to set up the cells required for the snake to move around in.

What i am trying to do now is place food randomly. This method should find a randomly chosen clear cell. I was hoping i'd use a do-while loop.

I understand to choose a cell, i will need to choose its X and Y values randomly an that these must lie in the range zero to one less than the size of grid.

To obtain two integers in range 0.0 to n-1, i was hoping i can use the following:

x = (int) (Math.random() * n);
y = (int) (Math.random() * n);

Any ideas on the do-while loop because i cannot get it to work.

Please Help :(

Kind regards

Shyam

[JosAH]

You should generate a cell (x, y) and if it's not empty, try again:

do {
   generate a cell (x,y)
}
while (cell[x][y] != empty);

kind regards,

Jos

[Shyamz1]

I don't seem to understand sorry. Here is my code, and i'm trying to create a method for placing the food:

public class Game
{

// ----------------------------------------------------------------------
// Part a: the score message

  private static String scoreMessage;
  
  public String getScoreMessage()
  {
    return scoreMessage;
  } // getScoreMessage


  public void setScoreMessage(String message)
  {
    scoreMessage = message; 
  } // setScoreMessage


  public String getAuthor()
  {
    return "Shyam Gorasia";
  } // getAuthor


// ----------------------------------------------------------------------
// Part b: constructor and grid accessors

  private final int gridSize;
  private final Cell[][] gridCell;

  public Game(int requiredGridSize)
  {
   
    gridSize = requiredGridSize;
    gridCell = new Cell[requiredGridSize][requiredGridSize];
    
    for (int row = 0; row < gridSize; row++)
      for (int column = 0; column < gridSize; column++)
	gridCell[row][column] = new Cell();
    
  } // Game


  public int getGridSize()
  {
    return gridSize;
  } // getGridSize


  public Cell getGridCell(int x, int y)
  {
    return gridCell[x][y];
  } // getGridCell


// ----------------------------------------------------------------------
// Part c: initial game state

// Part c-1: setInitialGameState method

  public void setInitialGameState(int requiredTailX, int requiredTailY,
                                  int requiredLength, int requiredDirection)
  {
    for (int row = 0; row < gridSize; row++)
      for (int column = 0; column < gridSize; column++)
	gridCell[row][column].setClear();
	
    
  } // setInitialGameState

  
  
// ----------------------------------------------------------------------
// Part c-2 place food

   public void placeFood()
   {
     int gridSize;
     do
     {
       int randomXValue = (int) (Math.random() * gridSize);
       int randomYValue = (int) (Math.random() * gridSize);
     
     while 
       
   
  

// ----------------------------------------------------------------------
// Part c-3: place snake


// ----------------------------------------------------------------------
// Part d: set snake direction


  public void setSnakeDirection(int requiredDirection)
  {
  } // setSnakeDirection


// ----------------------------------------------------------------------
// Part e: snake movement

// Part e-1: move method


  public void move(int moveValue)
  {
  } // move


// ----------------------------------------------------------------------
// Part e-2: move the snake head


// ----------------------------------------------------------------------
// Part e-3: move the snake tail


// ----------------------------------------------------------------------
// Part e-4: check for and deal with crashes


// ----------------------------------------------------------------------
// Part e-5: eat the food


  public int getScore()
  {
    
    return 99999999;
  } // getScore


// ----------------------------------------------------------------------
// Part f: cheat


  public void cheat()
  {
  } // cheat


// ----------------------------------------------------------------------
// Part g: trees


  public void toggleTrees()
  {
  } // toggleTrees


// ----------------------------------------------------------------------
// Part h: crash countdown


// ----------------------------------------------------------------------
// Part i: optional extras


  public String optionalExtras()
  {
    return "  No optional extras defined\n";
  } // optionalExtras


  public void optionalExtraInterface(char c)
  {
    if (c > ' ' && c <= '~')
      setScoreMessage("Key " + new Character(c).toString()
                      + " is unrecognised (try h)");
  } // optionalExtraInterface

} // class Game

[JosAH]

// ----------------------------------------------------------------------
// Part c-2 place food

   public void placeFood()
   {
     int gridSize= ...; // give it a value
     int randomXvalue;
     int randomYvalue;
     do
     {
       randomXValue = (int) (Math.random() * gridSize);
       randomYValue = (int) (Math.random() * gridSize);
     }
     while (/* cell at randomXvalue, randomYvalue isn't empty */);

      // place food at the generated cell position

I changed your 'place food' section (see above) and added a bit of comment for you to work out.

kind regards,

Jos

[KevinWorkman]

Crossposted: Snake Game In Java - Java Programming Forums