Classes, Objects, and Arrays (Java)

In this assignment, we will be making a program to populate a game board with pieces and to move those pieces around on the board. Use the files Assignment.java, GameBoard.java, and GamePiece.java. All files are available on Canvas. You will need to add header comments to each file along with comments for all the methods you will be implementing.

Do not make any other changes to the files beyond adding comments and updating the methods described in the following instructions.

CODE:

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GamePiece.java

public class GamePiece {

// add instance variable

public GamePiece() {

// implement method

}

public GamePiece(String newLabel) {

// implement method

}

public String getLabel() {

// implement method

return "";

}

public String toString() {

// implement method

return "";

}

}

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Additional code:

//Gameboard.java

public class GameBoard {

// TODO create instance variables

public GameBoard(int rows, int cols) {

// TODO implement method

}

public GamePiece getPiece(int row, int col) {

// TODO implement method

return null;

}

public boolean isSpaceValid(int row, int col) {

// TODO implement method

return false;

}

public boolean addPiece(int row, int col, GamePiece piece) {

// TODO implement method

return false;

}

public boolean movePiece(int srcRow, int srcCol, int destRow, int destCol) {

// TODO implement method

return false;

}

public String toString() {

// TODO implement method

return "";

}

}

//Assignment.java

import java.util.Scanner;

public class Assignment {

/**

* main method for the assignment.

*

* This method takes input from the user to allow testing various scenarios

* for the GameBoard and GamePiece classes.

*/

public static void main(String[] args) {

// declare local variables

int row;

int col;

int destRow;

int destCol;

int rowNum;

int colNum;

GameBoard board;

GamePiece piece;

Scanner input = new Scanner(System.in);

String inputString;

// obtain board size from the user

System.out.println("Please enter the number of rows.");

rowNum = input.nextInt();

System.out.println("Please enter the number of columns.");

colNum = input.nextInt();

board = new GameBoard(rowNum, colNum);

// obtain a label for the next piece from the user

System.out.println("Please enter a label for a new piece. Enter "Q" when done.");

inputString = input.next();

// continue until the user indicates they are done

while (!inputString.equalsIgnoreCase("Q")) {

// create a new GamePiece from the user input

piece = new GamePiece(inputString);

// obtain a row and column to place the new piece

System.out.println("Please enter a row for the piece.");

row = input.nextInt();

System.out.println("Please enter a column for the piece.");

col = input.nextInt();

// validate the space is valid

if (board.isSpaceValid(row, col)) {

// add the piece

if (board.addPiece(row, col, piece)) {

System.out.println("New piece "" + piece.getLabel() + "" added.");

}

else {

System.out.println("A piece is already at that space.");

System.out.println("New piece "" + piece.getLabel() + "" not added.");

}

}

else {

System.out.println("Invalid row or column.");

System.out.println("New piece "" + piece.getLabel() + "" not added.");

}

// obtain a label for the next piece from the user

System.out.println("Please enter a label for a new piece. Enter "Q" when done.");

inputString = input.next();

}

// check if the user wants to move a piece

System.out.println(board.toString());

System.out.println("Would you like to move a piece? Enter "Y" to move a piece");

inputString = input.next();

while (inputString.equalsIgnoreCase("Y")) {

// obtain the piece's location from the user

System.out.println("Please enter the piece's row.");

row = input.nextInt();

System.out.println("Please enter the piece's column.");

col = input.nextInt();

// obtain the piece's destination from the user

System.out.println("Please enter the piece's new row.");

destRow = input.nextInt();

System.out.println("Please enter the piece's new column.");

destCol = input.nextInt();

// validate that both spaces are valid

if (board.isSpaceValid(row, col) && board.isSpaceValid(destRow, destCol)) {

// move the piece

if (board.movePiece(row, col, destRow, destCol)) {

System.out.println("Piece moved to new space.");

}

else {

System.out.println("A piece is already in that space.");

}

}

else {

System.out.println("A row or column is invalid. No piece moved.");

}

// print the current state of the board and prompt the user to continue

System.out.println(board.toString());

System.out.println("Would you like to move a piece? Enter "Y" to move a piece");

inputString = input.next();

}

input.close();

}

}

First, you need to implement the GamePiece class in the GamePiece java file. It should have one instance for label (String). In addition, the following methods need to be implemented as follows. Method public GamePiece) Constructs a GamePiece object by assigning the label with the default value Description of the Method 93 public jamePiece(String ovided. newLabel) public String Returns the instance variable label. getLabel public String toString Constructs a String of length 3 from the label. If the label is shorter than onstructs a GamePiece object by assigning the label with the newLabel length 3, then the new String should be the label with spaces appended to make it the correct length. If the label is longer than 3, then use the first 3 characters of the label