# Java的属性赋值的先后顺序
public class Attribute {
public static void main(String[] args) {
Order order = new Order();
System.out.println(order.orderId);
}
}
class Order{
{
orderId = 4;
}
int orderId = 3;
}
# Java被final修饰的语法
# Java中的抽象类和抽象方法
