Will Downie

Ok, so I am creating a simplified chess game. In my game, it's the same board and rules of chess, except there's only pawns. I have a GUI displaying a board, but I need some help. How would I make a MouseListener that would enable me to move one pawn from one square to another? Additionally, I will run into the problem of whether or not that pawn's path is blocked. I guess my problem right now is being able to use the board I have, and somehow assign it a coordinate grid? Or something? I figured a coordinate grid would enable simple pawn movement, like y + 1 to move it forward, or something. I'm not sure.
I guess if anyone had any old code laying around to help me out I would really appreciate it.

import java.awt.*; import javax.swing.JFrame; import javax.swing.JPanel; public class Grid extends JPanel { private static final long serialVersionUID = 1L; public static final int grid = 8; public void paintComponent(Graphics g) { super.paintComponent(g); Graphics2D graphics = (Graphics2D) g; graphics.setColor(Color.black); Dimension size = getSize(); Insets insets = getInsets(); int w = size.width - insets.left - insets.right; int h = size.height - insets.top - insets.bottom; int squareW = (int)((double)w / grid); int squareH = (int)((double)h / grid); for (int row = 0; row < grid; row++) { for (int col = 0; col < grid; col++) { if ((row + col) % 2 == 0) { int x = (int) (row * (double) w / grid); int y = (int) (col * (double) h / grid); graphics.fillRect(x, y, squareW, squareH); } } } } } import java.awt.Dimension; import javax.swing.JFrame; public class Chess { public static void main(String[] args) { // TODO code application logic here Grid grid = new Grid(); grid.setPreferredSize(new Dimension(400, 400)); JFrame frame = new JFrame("Grid"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.add(grid); frame.pack(); frame.setVisible(true); } } public class BoardPanel extends JPanel{ Board board; Timer timer; Piece piece; BoardPanel() { board = new Board(8,8); addMouseListener(new ClickEvent()); timer = new Timer(50, new TimerEvent()); timer.start(); //Around this point I'm not really sure what's going on } public void paint(Graphics g) { super.paint(g); board.draw(g); } private class TimerEvent implements ActionListener { @Override public void actionPerformed(ActionEvent ae) { repaint(); } } private class ClickEvent implements MouseListener { @Override public void mouseClicked(MouseEvent me) { } @Override public void mousePressed(MouseEvent me) { me.getX(); me.getY(); } @Override public void mouseReleased(MouseEvent me) { } @Override public void mouseEntered(MouseEvent me) { } @Override public void mouseExited(MouseEvent me) { } } }

Ok, so as mentioned in the title, I am not very experienced with Java. I am making a Chess project, or I am attempting to, anyway. I have a super class Piece, then the other pieces, Rook, Pawn, etc. which extend Piece. Now, I plan on making a isValid() method to essentially move the pieces...except I have no idea which parameters I should use...or what I should even do anyway. Below is the code for Piece, and Rook and Pawn, which are unfinished. And yeah, the grid[][] in Pawn was my failed attempt at actually trying to do something.
abstract public class Piece { boolean color; Piece(boolean c) { color = c; } /*this method, when you override it, will determine whether the given destination is valid for this piece based on its current position */ abstract boolean isValid(int x, int y); } abstract public class Rook extends Piece{ Rook(boolean c) { super(c); } } abstract public class Pawn extends Piece{ int grid[][]; int x; int y; Pawn(boolean c, int width, int height) { super(c); grid = new int[width][height]; } abstract void isValid(int x, int y) { } }