Question

求问java的一个构造函数怎么写！！！急！！！

package l07b;/** * A program to test the Car data-type class. * * @author Mark Young (A00000000) */public class LotsaCars { public static void main(String[] args) { Car car1, car2, car3, carToForget, car54; // create first three Cars car1 = new Car(); car2 = new Car(); car3 = new Car(); // Create cars 4 thru 53 for (int i = 4; i <= 53; i++) { carToForget = new Car(); } // Create Car 54 car54 = new Car(); // Report on Cars System.out.println("\n\n" + "Lots of Cars\n" + "------------\n\n" + "Car #1's VIN is " + car1.VIN + "\n" + "Car #2's VIN is " + car2.VIN + "\n" + "Car #3's VIN is " + car3.VIN + "\n" + "Car #54's VIN is " + car54.VIN + "\n"); }}----------------------------------------------------------------------------------以上，要写一个构造函数，输出

Answer 1

你需要的构造函数：

public class Car {
public static int NUM = 0;
public int VIN = 0;
public Car(){
NUM++;
VIN = NUM;
}
}
思考点：在于new几次之后，car里面的vin属性就是几。所以需要用到一个静态变量来存储，创建对象的次数，然后在将这个变量赋值给vin。