isSelected and userTouch is done and modification on toString

src/backend/Board.java

@@ -7,6 +7,11 @@ public class Board {
     public int width;
     public int height;
     private Piece[][] board;
+    private boolean hasSelectedPiece = false;
+    private int selectedX = -1;
+    private int selectedY = -1;
+    private int turnNumber = 0;
+    private boolean turnWhite = true;
     
     public Board(int colNum, int lineNum) {
         this.width = colNum;
@@ -107,16 +112,70 @@ public class Board {
             }
         }
         return pieces;
+        
+        
+        
+        
     }
-
+    
-    public void userTouch(int x, int y) {
-        // TODO
-    }
-
     public boolean isSelected(int x, int y) {
-        return false;
+        return hasSelectedPiece && selectedX == x && selectedY == y;
     }
     
+    
+    
+    
+    
+    
+    public void userTouch(int x, int y) {
+        if (x < 0 || x >= width || y < 0 || y >= height) return;
+
+        Piece clicked = board[x][y];
+
+        if (!hasSelectedPiece) {
+            if (clicked != null && clicked.isWhite() == turnWhite) {
+                // Select piece
+                selectedX = x;
+                selectedY = y;
+                hasSelectedPiece = true;
+            }
+        } else {
+            if (selectedX == x && selectedY == y) {
+                // Unselect
+                hasSelectedPiece = false;
+            } else {
+                Piece selectedPiece = board[selectedX][selectedY];
+                if (selectedPiece != null) {
+                    // Capture if needed
+                    if (board[x][y] != null) {
+                        if (board[x][y].isWhite() == selectedPiece.isWhite()) {
+                            // Can't capture own piece
+                            hasSelectedPiece = false;
+                            return;
+                        }
+                    }
+
+                    // Move piece
+                    board[x][y] = selectedPiece;
+                    board[selectedX][selectedY] = null;
+                    selectedPiece.setX(x);
+                    selectedPiece.setY(y);
+
+                    // Switch turn
+                    turnWhite = !turnWhite;
+                    turnNumber++;
+
+                    // Unselect
+                    hasSelectedPiece = false;
+                }
+            }
+        }
+    }
+
+    //public boolean isSelected(int x, int y) {
+    	//return false
+   // }
+    
     /* saving-loading feature */
     public String[] toFileRep() {
         return null;

src/backend/Piece.java

@@ -23,6 +23,15 @@ public class Piece {
 		return y;
 	}
 	
+	public void setX(int x) {
+	    this.x = x;
+	}
+
+	public void setY(int y) {
+	    this.y = y;
+	}
+	
+	
 	public PieceType getType() {
 		
 		return type;