Question

求一道java的题目？请教高手？？

设计一个赛车类RaceCar，包含属性:赛车编号carNo和车手名字driveName,另外在赛车的构造类中声明一个静态变量count用于记录赛车的总数,初始化为0.在RaceCar的构造方法除了给属性赋值外还应递增count的值。编写一个静态static int getCount（）用于获取count的值.

在main方法中创建若干个RaceCar的对象,保存在一个RaceCar类型的数组中，一次输出个赛车的信息兵输出赛车总数的信息

Answer 1

//赛车类RaceCar
public class RaceCar {
private String carNo;
private String driveName;
private static int count = 0;

public RaceCar(String carNo,String driveName){
this.carNo = carNo;
this.driveName = driveName;
RaceCar.count++;
}

public String getCarNo() {
return carNo;
}

public void setCarNo(String carNo) {
this.carNo = carNo;
}

public String getDriveName() {
return driveName;
}

public void setDriveName(String driveName) {
this.driveName = driveName;
}

public static int getCount() {
return count;
}

}

//main方法
public static void main(String[] args) {
RaceCar car1 = new RaceCar("C0001", "LESLIEWJJ1");
RaceCar car2 = new RaceCar("C0002", "LESLIEWJJ2");
RaceCar car3 = new RaceCar("C0003", "LESLIEWJJ3");
RaceCar car4 = new RaceCar("C0004", "LESLIEWJJ4");

RaceCar[] cars = { car1, car2, car3, car4 };

for (int i = 0; i < cars.length; i++) {
System.out.println("车号：" + cars[i].getCarNo() +" "+ "车手："
+ cars[i].getDriveName());
}
System.out.println("赛车数量为："+RaceCar.getCount());
}

Answer 2

public class RaceCar {
private String driverName;
private String carNO;
private static int count=0;
public RaceCar(String carNo,String driverName){
this.carNO=carNo;
this.driverName=driverName;
count++;
}
public static int getCount(){
return count;
}

public static void main(String[] arg){
RaceCar[] car=new RaceCar[4];
RaceCar car1=new RaceCar("1","大奔");
RaceCar car2=new RaceCar("2","宝马");
RaceCar car3=new RaceCar("3","帕萨特");
RaceCar car4=new RaceCar("4","奥迪");
car[0]=car1;
car[1]=car2;
car[2]=car3;
car[3]=car4;
for(int i=0;i<car.length;i++){
System.out.println("车编号:"+car[i].carNO);
System.out.println("车手:"+car[i].driverName);
}
System.out.println("总数量:"+RaceCar.count);
}
}

Answer 3

写的都非常完美！

Answer 4

不错