How to compile in java? Chess game

package chessPieces;

public class Pawn extends ChessPiece{
	char color;
	public char getPiece()
	{
		return 'P';
	}
	public Pawn(char color)
	{
		this.color = color;
	}
	public char getColor(char color)
	{
		return color;
	}
	
}

package board;

import chessPieces.ChessPiece;
import chessPieces.EmptySpace;
import chessPieces.Pawn;

public class BoardInterface {
	char white = 'W';
	char empty = '-';
	ChessPiece[][] board;
	
	public BoardInterface()
	{

		this.board = new ChessPiece[8][8];
		for(int i = 0; i < 7; i++)
		{
			for(int j = 0; j < 8; j++)
			{
				board[i][j] = new EmptySpace(empty);
			}
		}
		this.board[7][0] = new Pawn(white);
	}
	public ChessPiece[][] getBoard()
	{
		return this.board;
	}
	
}

package chessPieces;

public class EmptySpace extends ChessPiece {
	char color;
	public EmptySpace(char color)
	{
		this.color = color;
	}
}

package main;


import chessPieces.ChessPiece;
import chessPieces.EmptySpace;
import chessPieces.Pawn;


public class Main {
	public static void main(String[] args) {
		ChessPiece chesspiece = new ChessPiece();
	}
}