java程序，抽象类实现，求具体代码

java程序，抽象类实现，求具体代码

package test;

public abstract class Car {
//转弯
abstract void turn();
//启动
abstract void start();

void what(){
System.out.println("this is"+this.getClass().getSimpleName());
}
public static void main(String[] args) {

Car[] cars ={new Bicycle(),newAutomobile(),new GasAutomobile(),new DieselAutomobile()};
for (Car car : cars) {
car.start();
}
}
}
class Bicycle extends Car{

@Override
void turn() {
System.out.println("this is"+this.getClass().getSimpleName());
}

@Override
void start() {
System.out.println("this is"+this.getClass().getSimpleName());
}
voidwhat(){
}

}
classAutomobile extends Car{

@Override
void turn() {
System.out.println("this is"+this.getClass().getSimpleName());
}

@Override
void start() {
System.out.println("this is"+this.getClass().getSimpleName());
}

}

class GasAutomobile extends Automobile{
//重写startturn
@Override
void turn() {
System.out.println("this is"+this.getClass().getSimpleName());
}

@Override
void start() {
System.out.println("this is"+this.getClass().getSimpleName());
}
}

class DieselAutomobile extends Automobile{
@Override
void start() {
System.out.println("this is"+this.getClass().getSimpleName());
}

voidwhat(){
System.out.println("this is"+this.getClass().getSimpleName());

}
}