java程式語言
public class EX203_1 {
class Car{
int year = 0;
String brand = "";
int speed = 0;
void Constructor(int y,String b){
year = y;
brand = b;
}
void Constructor(int y,String b,int s){
year =y;
brand = b;
speed = s;
}
void Accessors(int y,String b,int s){
this.year = y;
this.brand = b;
this.speed = s;
}
void Accelerate(){
speed += 10;
}
void Brack(){
if(speed>=10)speed -= 10;
else speed = 0;
}
}
class SportsCar extends Car{
void Accelerate(){
speed += 20;
}
void Brack(){
if(speed>=20)speed -= 20;
else speed = 0;
}
}
class Bus extends Car{
void Accelerate(){
speed += 5;
}
void Brack(){
if(speed>=5)speed -= 5;
else speed = 0;
}
}
public static void main(String args[]){
}
}
麻煩哪位大大可以幫忙，因為真的寫不下去了，感謝~!
撰寫一測試程式，各產生一個Car object，一個SportsCar object和一個Bus object (分別利用不同參數的Constructor產生)，然後顯示目前三種汽車的速度。接下來分別呼叫accelerate method和brake method 2次，每次呼叫後必須顯示目前汽車的速度。
還有同學寫其他部分，所以統一用java ^^~
高手大大您好~可以方便給個註解
小妹剛學程式不久，有點看不懂
例如：
System.exit(0);
@Override
用途是???
3 個解答
- 8 年前最佳解答
public static class Car{
int year = 0;
String brand = "";
int speed = 0;
public Car(int y,String b){
this.year = y;
this.brand = b;
}
public Car(int y,String b,int s){
this.year =y;
this.brand = b;
this.speed = s;
}
void Accessors(int y,String b,int s){
this.year = y;
this.brand = b;
this.speed = s;
}
void Accelerate(){
speed += 10;
System.out.println("目前車速:"+speed);
}
void Brack(){
if(speed>=10)speed -= 10;
else speed = 0;
System.out.println("目前車速:"+speed);
}
}
static class SportsCar extends Car{
public SportsCar(int y, String b, int s) {
super(y, b, s);
}
void Accelerate(){
speed += 20;
System.out.println("目前車速:"+speed);
}
void Brack(){
if(speed>=20)speed -= 20;
else speed = 0;
System.out.println("目前車速:"+speed);
}
}
static class Bus extends Car{
public Bus(int y, String b, int s) {
super(y, b, s);
}
void Accelerate(){
speed += 5;
System.out.println("目前車速:"+speed);
}
void Brack(){
if(speed>=5)speed -= 5;
else speed = 0;
System.out.println("目前車速:"+speed);
}
}
public class EX203 {
public static void main(String args[]){
Car car = new Car(2000,"toyota",0);
SportsCar sc = new SportsCar(2001,"JAGUAR",0);
Bus bus = new Bus(2002,"hino",0);
System.out.println("目前是CAR：");
car.Accelerate();
car.Accelerate();
car.Brack();
car.Brack();
System.out.println("目前是SportsCar：");
sc.Accelerate();
sc.Accelerate();
sc.Brack();
sc.Brack();
System.out.println("目前是bus：");
bus.Accelerate();
bus.Accelerate();
bus.Brack();
bus.Brack();
}
}
參考資料： 稍微修改一下 - JohnLv 78 年前
public class EX203_1 {
public static void main(String[] args) {
Car sportCar = new SportCar(2013, "porsche");
Car bus = new Bus(2000, "toyota");
Car familyCar = new Car(2013, "honda");
for (int i = 0; i < 2; i++) {
sportCar.accelerate();
bus.accelerate();
familyCar.accelerate();
}
for (int i = 0; i < 2; i++) {
sportCar.brake();
bus.brake();
familyCar.brake();
}
System.exit(0);
}
}
class Car {
private int year = 0;
private String brand;
private int speed;
public Car(int year, String brand) {
this.year = year;
this.brand = brand;
}
public void setSpeed(int speed) {
this.speed = speed;
}
public int getSpeed() {
return this.speed;
}
public void increasedBy(int speed) {
this.speed += speed;
showDashboard();
}
public void decreasedBy(int speed) {
if (getSpeed() >= speed) {
this.speed -= speed;
} else {
this.stop();
}
showDashboard();
}
private void stop() {
this.speed = 0;
}
public void accelerate() {
increasedBy(10);
}
public void brake() {
decreasedBy(10);
}
public String getBrand() {
return this.brand;
}
public int getYear() {
return this.year;
}
public void showDashboard() {
System.out.format("%s (%d) speed: %d%n", getBrand(), getYear(),
getSpeed());
}
}
class SportCar extends Car {
public SportCar(int year, String brand) {
super(year, brand);
}
@Override
public void accelerate() {
super.increasedBy(20);
}
@Override
public void brake() {
super.decreasedBy(20);
}
}
class Bus extends Car {
public Bus(int year, String brand) {
super(year, brand);
}
@Override
public void accelerate() {
super.increasedBy(5);
}
@Override
public void brake() {
super.decreasedBy(5);
}
}
