add pieces into board

src/backend/Board.java

@@ -5,10 +5,18 @@ import java.util.ArrayList;
 public class Board {
 	private int width;
 	private int height;
+	private ArrayList<Piece> pieces;
+	private int turnNumber = 0;
+	private boolean isWhite = true;
+	private int[] selected = null; // for userTouch
+	private ArrayList<int[]> highlighted = new ArrayList<>();
+	private ArrayList<Move> moveHistory = new ArrayList<>();
+	
 
 	public Board(int colNum, int lineNum) {
 		this.width = colNum;
 		this.height = lineNum;
+		this.pieces = new ArrayList<>();
 		//TODO
 	}
 
@@ -24,33 +32,89 @@ public class Board {
 
 	public int getTurnNumber() {
 		//TODO
-		return 0;
+		return turnNumber;
 	}
 
 	public boolean isTurnWhite() {
 		//TODO
-		return false;
+		return isWhite;
 	}
 
 	public void setPiece(boolean isWhite, PieceType type, int x, int y) {
+		Piece piece = new Piece(isWhite, type, x, y);
+	    pieces.add(piece);
 		//TODO
 	}
 
 	public void populateBoard() {
+		cleanBoard();  // clear any existing pieces
+
+	    // White pieces
+	    for (int i = 0; i < 8; i++) {
+	        setPiece(true, PieceType.Pawn, i, 1);
+	    }
+	    setPiece(true, PieceType.Rook, 0, 0);
+	    setPiece(true, PieceType.Knight, 1, 0);
+	    setPiece(true, PieceType.Bishop, 2, 0);
+	    setPiece(true, PieceType.Queen, 3, 0);
+	    setPiece(true, PieceType.King, 4, 0);
+	    setPiece(true, PieceType.Bishop, 5, 0);
+	    setPiece(true, PieceType.Knight, 6, 0);
+	    setPiece(true, PieceType.Rook, 7, 0);
+
+	    // Black pieces
+	    for (int i = 0; i < 8; i++) {
+	        setPiece(false, PieceType.Pawn, i, 6);
+	    }
+	    setPiece(false, PieceType.Rook, 0, 7);
+	    setPiece(false, PieceType.Knight, 1, 7);
+	    setPiece(false, PieceType.Bishop, 2, 7);
+	    setPiece(false, PieceType.Queen, 3, 7);
+	    setPiece(false, PieceType.King, 4, 7);
+	    setPiece(false, PieceType.Bishop, 5, 7);
+	    setPiece(false, PieceType.Knight, 6, 7);
+	    setPiece(false, PieceType.Rook, 7, 7);
 		//TODO
 	}
 	
 	public void cleanBoard() {
+		pieces.clear();
 		//TODO
 	}
 	
 	public String toString() {
+		String[][] grid = new String[height][width];
+
+	    // Fill grid with dots (empty)
+	    for (int y = 0; y < height; y++) {
+	        for (int x = 0; x < width; x++) {
+	            grid[y][x] = ".";
+	        }
+	    }
+
+	    // Place each piece in its position
+	    for (Piece p : pieces) {
+	        String symbol = p.getType().toString().substring(0, 1); // e.g., "P" for Pawn
+	        if (!p.isWhite()) {
+	            symbol = symbol.toLowerCase(); // lowercase for black
+	        }
+	        grid[p.getY()][p.getX()] = symbol;
+	    }
+
+	    // Build the string representation
+	    StringBuilder sb = new StringBuilder();
+	    for (int y = 0; y < height; y++) {
+	        for (int x = 0; x < width; x++) {
+	            sb.append(grid[y][x]).append(" ");
+	        }
+	        sb.append("\n");
+	    }
+
+	    return sb.toString();
 		//TODO
-		return "";
 	}
 	
 	public ArrayList<Piece> getPieces() {
-		ArrayList<Piece> pieces = new ArrayList<>();
 		//TODO
 		
 		return pieces;
@@ -63,7 +127,7 @@ public class Board {
 
 	public boolean isSelected(int x, int y) {
 		//TODO
-		return false;
+		return selected != null && selected[0] == x && selected[1] == y;
 	}
 	
 	/* saving-loading feature :*/