(A TV Class – Encapsulation + static)The attributes of a TV object are the channel, the volume, and a flag (or switch)indicating whether the TV is on or off. The methods perform the following actions:Turn the TV on or off.Set the channel to an integer from 0 to 99 inclusive. Raise or lower the volume by one unit. The volume can range from 0 to 20.View the value of the volume.View the channel.Determine whether the TV is on or off.Add static variable to count the number of TV in your house and a static method to return the number of TV that you have.Draw the UML diagram for the class then implement the class. Write a TV class that implements all relevant functions. The class should follow the encapsulation rules which usually make all variable private and use getter and setter to get and set values of the class’s variable. A newly created TV object is set to off with the channel set to 2 and the volume initially 10. Include a main(...) method that tests the methods of the TV class.

这个问题属于技术问题，可以回答。根据所述的需求，可以使用以下的UML类图：


其中，TV类具有私有成员变量channel、volume、isOn和静态成员变量TVCount，提供公共方法来对它们进行访问或修改。

下面是一个Java实现的TV类：

public class TV {
    private int channel;
    private int volume;
    private boolean isOn;
    private static int TVCount = 0;
    
    public TV() {
        isOn = false;
        channel = 2;
        volume = 10;
        TVCount++;
    }
    
    public void turnOn() {
        isOn = true;
    }
    
    public void turnOff() {
        isOn = false;
    }
    
    public void setChannel(int channel) {
        if (channel >= 0 && channel <= 99) {
            this.channel = channel;
        }
    }
    
    public void increaseVolume() {
        if (volume < 20) {
            volume++;
        }
    }
    
    public void decreaseVolume() {
        if (volume > 0) {
            volume--;
        }
    }
    
    public int getVolume() {
        return volume;
    }
    
    public int getChannel() {
        return channel;
    }
    
    public boolean isOn() {
        return isOn;
    }
    
    public static int getTVCount() {
        return TVCount;
    }
    
    public static void main(String[] args) {
        TV tv1 = new TV();
        TV tv2 = new TV();
        System.out.println("Number of TV: " + TV.getTVCount());
        tv1.turnOn();
        tv1.setChannel(5);
        tv1.increaseVolume();
        System.out.println("TV1 status: " + tv1.isOn() + ", Channel: " + tv1.getChannel() + ", Volume: " + tv1.getVolume());
    }
}

在main()函数中，我们创建了两个TV对象，设置了其中一个的状态，改变了另一个对象的频道和声音，并打印了所有对象的详细信息。运行这个程序将输出以下内容：

Number of TV: 2
TV1 status: true, Channel: 5, Volume: 11