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## #1 2012-05-22 03:16:11

geforce
Guest

### JAVA CODING - Implementing a methods for a game

#### Code:

```
import acm.graphics.*;
import acm.program.*;
import java.awt.Color;
import java.util.Iterator;
import java.util.Random;
import java.util.List;

public class LAB1
{
final static int BLOCKWIDTH = 50;
final static int BLOCKHEIGHT = 10;
final static int NBLOCKS = 10;
final static int BLOCKROWS = 5;
final static int ROWZERO = 50;
final static int ROWSEPARATION = (5*BLOCKHEIGHT);
final static int WIDTH = (BLOCKWIDTH*NBLOCKS);
final static int HEIGHT = 600;

public static java.util.List<acm.graphics.GRect> createPlayfield()
{
Random r = new Random();
List<GRect> l = null;
int x = 0;
int y = ROWZERO - BLOCKHEIGHT;
Color c = new Color(r.nextInt(256));

for (int i = 0; i < BLOCKROWS; i++)
{
i = (i * ROWSEPARATION) + ROWZERO;

for(int j = 0; j < NBLOCKS; j++)
{
j = j * BLOCKWIDTH;
}
}

}

public static void addBrick(java.util.List<acm.graphics.GRect> l, int x, int y, int width, int height, java.awt.Color c)
{
}

public static acm.graphics.GRect createBrick(int x, int y, int width, int height, java.awt.Color c)
{
GRect s = new GRect(x,y,WIDTH,HEIGHT);

return s;
}
public static acm.graphics.GRect intersect(acm.graphics.GObject o,java.util.List<acm.graphics.GRect> l)
{
GRectangle r = o.getBounds();

for(GRect e : l)
{
if(e.getBounds().intersects(r))
return e;
}
return null;
}```

Problem I have is the createPlayfield() method, I have no idea on what to do, this is the description..

createPlayfield is a static method that returns a List of GRects. Each GRect is coloured randmoly and is
of size BLOCKWIDTH x BLOCKHEIGHT. The blocks are placed in a grid BLOCKROWS height x
NBLOCKS. The i'th row of blocks has its upper edge aligned with row i * ROWSEPARATION +
ROWZERO. The j'th column of blocks has its left edge aligned with j * BLOCKWIDTH. You may
find it useful to implement this method using the addBrick method below.

API's : The acm.graphics.GRect Class.

I really have no Idea what to do, can anyone break down the steps on what to do? I know that for i'th and j'th blocks i need a nested for loop but I don't know how to make the block return the GRects and also have a problem with where to place the GRect constructor (as in the for loop for it to be repeated or anywhere else), thanks for any suggestions.

I would really like to get help on this, I've tryed a lot to fix this for the past couple of days, the following playfield method makes no sense, still trying to figure out what to do.

## #2 2012-05-22 05:37:42

geforce
Novice

Offline

### Re: JAVA CODING - Implementing a methods for a game

Is this the right section that I should be posting, or should it be somewhere else..?

## #3 2012-05-22 05:48:06

bobbym

Online

### Re: JAVA CODING - Implementing a methods for a game

Hi geforce;

Welcome to the forum. Yes, you are in the right section.

In mathematics, you don't understand things. You just get used to them.
Some cause happiness wherever they go; others, whenever they go.
If you can not overcome with talent...overcome with effort.

## #4 2012-05-22 06:02:40

geforce
Novice

Offline

### Re: JAVA CODING - Implementing a methods for a game

Alright, just making sure.