snake/Block.java at master · DJMcoder/snake · GitHub

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importjava.awt.Color;

/**
 * Class of blocks.
 *
 * @author Jin Kim
 * @version 8 December 2015
 */
publicclassBlock
{
privateMyBoundedGrid<Block> grid;
privateLocationlocation;
privateColorcolor;
/**
 * constructs a blue block, because blue is the greatest color ever!
 */
publicBlock()
 {
color = Color.BLUE;
grid = null;
location = null;
 }

//gets the color of this block
/**
 * Gets the color of this block.
 *
 * @return the color of the block.
 */
publicColorgetColor()
 {
returncolor;
 }

//gets the color of this block to newColor.
/**
 * Sets the color of this block to newColor.
 *
 * @param newColor new color of the block.
 */
publicvoidsetColor(ColornewColor)
 {
color = newColor;
 }

//gets the grid of this block, or null if this block is not contained in a grid
/**
 * gets the grid of this block, or null if this block is not contained in a grid
 *
 * @return grid of this block.
 */
publicMyBoundedGrid<Block> getGrid()
 {
returngrid;
 }

//gets the location of this block, or null if this block is not contained in a grid
/**
 * gets the location of this block, or null if this block is not contained in a grid
 *
 * @return location of this block.
 */
publicLocationgetLocation()
 {
returnlocation;
 }

//removes this block from its grid
//precondition: this block is contained in a grid
/**
 * Removes block from its Grid.
 * @precondition: this block is contained in a grid
 */
publicvoidremoveSelfFromGrid()
 {
grid.remove(location);
grid = null;
location = null;
 }

/**
 * puts this block into location loc of grid gr
 * if there is another block at loc, it is removed
 * @precondition: (1) this block is not contained in a grid
 * (2) loc is valid in gr
 *
 * @param gr Grid of this block.
 * @param loc location of this block.
 */
publicvoidputSelfInGrid(MyBoundedGrid<Block> gr, Locationloc)
 {
if(gr.get(loc)!= null)
 {
gr.get(loc).removeSelfFromGrid();
 }
gr.put(loc, this);
grid = gr;
location = loc;

 }

//moves this block to newLocation
//if there is another block at newLocation, it is removed
//precondition: (1) this block is contained in a grid
// (2) newLocation is valid in the grid of this block
/**
 * moves this block to newLocation
 * if there is another block at newLocation, it is removed
 * @precondition: (1) this block is contained in a grid
 * (2) newLocation is valid in the grid of this block
 *
 * @param newLocation newLocation of the block.
 */
publicvoidmoveTo(LocationnewLocation)
 {
grid.remove(location);
putSelfInGrid(grid, newLocation);
 }

//returns a string with the location and color of this block
/**
 * returns a string with the location and a color of this block.
 *
 * @return a string with the location and a color of this block.
 */
publicStringtoString()
 {
return"Block[location=" + location + ",color=" + color + "]";
 }
}