Add constructor to create object with argument of class Order

src/Order.java

@@ -20,6 +20,15 @@ public abstract class Order {
 		this.stock = stock;
 	}
 	
+	Order(Order o) {
+		this.qty = o.getQty();
+		this.price = o.getPrice();
+		this.c = o.getCustomer();
+		this.time = o.getTime();
+		this.type = o.getType();
+		this.stock = o.getStock();
+	}
+	
 	int getQty() {	return qty; }
 	
 	float getPrice() { return price; }
@@ -33,7 +42,7 @@ public abstract class Order {
 	Stock getStock() { return stock; }
 	
 	void setQty(int qty) { this.qty = qty; }
-
+	
 	@Override
 	public boolean equals(Object o) {
 		// self check