I think I fixed place on board for real?

Ship.java

@@ -190,14 +190,16 @@ public class Ship{
    }
    
    public void placeOnBoard(int[][] board){
+      int x_col = this.start[X]
+      int y_col = this.start[Y];
       if (this.vertical){
-         for (int c = this.start[X];c <= this.end[X];c++){
-            board[this.start[Y]][c] = 4;
+         for (int c = this.start[Y];c <= this.end[Y];c++){
+            board[x_col][c] = this.length;
          }
       }
       else {
-         for (int c = this.start[Y];c <= this.end[Y];c++){
-            board[c][this.start[X]] = 4;
+         for (int c = this.start[X];c <= this.end[X];c++){
+            board[c][y_col] = this.lenth;
          }
       }
    }