created new class for highlighted zones

src/backend/Board.java

@@ -9,7 +9,7 @@ public class Board {
 	private Piece chosenPiece=null;
 	private int turnNumber=0;
 	private boolean isTurnWhite=true;
-//	private ArrayList<int[]> highlightedSquares= new ArrayList<>();
+	private ArrayList<int[]> highlightedSquares= new ArrayList<>(); //stores highlighted board positions
 
 	public Board(int colNum, int lineNum) {
 		this.width=colNum;
@@ -168,8 +168,13 @@ public class Board {
 	/* The following methods require more work ! */
 
 	public boolean isHighlighted(int x, int y) {
-		//return highlightedSquares.contains(Point(x,y));
-	return true; }
+		for(int i=0; i<highlightedSquares.size();i++) { //loops through list of highlighted squares
+			int[] position= highlightedSquares.get(i); //gets position of highlighted square
+			if(position[0]==x && position[1]==y) { //checks if chosen highlighted square matches with position where piece can go 
+				return true; //it is highlighted
+			}
+		}
+return false; }
 			
 
 	public void undoLastMove() {

src/backend/MoveHighlighter.java

@@ -0,0 +1,33 @@
+package backend;
+
+import java.util.ArrayList;
+
+public class MoveHighlighter {
+	public static ArrayList<int[]> getPossibleMoves(Piece piece, Board board){
+		ArrayList<int[]> validMoves = new ArrayList<int[]>();
+		MovePiece movement = new MovePiece(piece, board);
+		PieceType type= piece.getType();
+		for(int x=0; x<board.getHeight();x++) {
+			for(int y=0; y<board.getHeight();y++) {
+				boolean valid=false;
+				if(type==PieceType.Pawn) {
+					valid=movement.movePawn(x, y);
+				} else if(type==PieceType.Rook) {
+					valid=movement.moveRook(x, y);
+				}else if(type==PieceType.King) {
+					valid=movement.moveKing(x, y);
+				}else if(type==PieceType.Queen) {
+					valid=movement.moveQueen(x, y);
+				}else if(type==PieceType.Bishop) {
+					valid=movement.moveBishop(x, y);
+				}else if(type==PieceType.Knight) {
+					valid=movement.moveKnight(x, y);
+				}
+				if(valid) {
+					validMoves.add(new int[] {x,y});
+				}
+			}
+		}
+		return validMoves;
+	}
+}