建立一个汽车Auto类，包括轮胎个数、汽车颜色、车身重量、速度等成员变量，并通过不同的构造方法创建实例。至少要求:汽车能够加速、减速、停车。再定义一个小汽车类Car，继承 Auto，并添加空调、CD等成员变量,覆盖加速、减速的方法。代码及详细注释

在Java中，我们可以建立一个名为`Auto`的基础汽车类和一个小汽车子类`Car`来满足这个需求。以下是详细的代码示例：

// 定义基础汽车类Auto
public class Auto {
    private int tireCount;
    private String color;
    private double weight;
    private double speed;

    // 默认构造函数
    public Auto(int tireCount, String color, double weight) {
        this.tireCount = tireCount;
        this.color = color;
        this.weight = weight;
        this.speed = 0; // 初始化速度为0
    }

    // 具体构造函数，提供速度参数
    public Auto(int tireCount, String color, double weight, double initialSpeed) {
        this(tireCount, color, weight);
        this.speed = initialSpeed;
    }

    // 加速方法，增加当前速度
    public void accelerate(double acceleration) {
        if (acceleration > 0) {
            this.speed += acceleration;
        } else {
            System.out.println("Invalid acceleration.");
        }
    }

    // 减速方法，减小当前速度
    public void decelerate(double deceleration) {
        if (deceleration > 0) {
            this.speed -= deceleration;
            if (this.speed < 0) {
                this.speed = 0;
            }
        } else {
            System.out.println("Invalid deceleration.");
        }
    }

    // 停车方法，设置速度为0
    public void stop() {
        this.speed = 0;
    }

    // 获取类信息
    @Override
    public String toString() {
        return "Auto [tireCount=" + tireCount + ", color=" + color + ", weight=" + weight + ", speed=" + speed + "]";
    }
}

// 小汽车子类Car继承自Auto
public class Car extends Auto {
    private boolean hasAirConditioner;
    private boolean hasCDPlayer;

    // 构造函数，引入新的特性
    public Car(int tireCount, String color, double weight, double initialSpeed, boolean airConditioner, boolean cdPlayer) {
        super(tireCount, color, weight, initialSpeed);
        this.hasAirConditioner = airConditioner;
        this.hasCDPlayer = cdPlayer;
    }

    // 重写加速方法，增加特色描述
    @Override
    public void accelerate(double acceleration) {
        super.accelerate(acceleration);
        if (hasAirConditioner && this.speed >= 60) {
            System.out.println("Air conditioner turned on as speed exceeds 60 km/h.");
        }
    }

    // 重写减速方法，增加特色描述
    @Override
    public void decelerate(double deceleration) {
        super.decelerate(deceleration);
        if (hasCDPlayer && this.speed <= 0) {
            System.out.println("CD player starts playing when car stops.");
        }
    }

    // 获取类信息
    @Override
    public String toString() {
        return "Car [" +
                "super=" + super.toString() +
                ", hasAirConditioner=" + hasAirConditioner +
                ", hasCDPlayer=" + hasCDPlayer +
                "]";
    }
}

在这个例子中，`Car`类继承了`Auto`类，添加了空调和CD播放机的成员变量，并覆盖了加速和减速方法，增加了额外的行为描述。