The adapter is an interface converter. It can be an independent hardware interface device, allowing the hardware or electronic interface to be connected with other hardware or electronic interfaces, or it can be an information interface. For example: power adapter, tripod base adapter, USB and serial port adapter, USB-C charger etc.

In a computer, the adapter is usually built into a card (or external) that can be inserted into the slot on the motherboard. The adapter information in the card is exchanged with the devices supported by the processor and the adapter.

Power adapter is the power supply conversion equipment of small portable electronic equipment and electronic appliances. It is generally composed of shell, power transformer and rectifier circuit. According to its output type, it can be divided into AC output type and DC output type. According to the connection mode, it can be divided into wall type and desktop type. Since mobile PC has no battery, power adapter is particularly important for it.

The power adapter of most Mobile PCs can automatically detect 100 ~ 240V AC (50 / 60Hz). Basically, all Mobile PCs have an external power supply and are connected to the host with a cable, which can reduce the volume and weight of the host. Only a few models have a built-in power supply in the host. There is a nameplate on the power adapter, which indicates the indicators such as power, input and output voltage and current. Pay special attention to the range of input voltage, which is the so-called "traveling power adapter".

When MBeans register with the MBean server, they need protocols to interact with these MBeans and retrieve information for requests from the management application. This is enabled through the protocol adapter, which can convert the management application data into standard protocol information.

Adaptation Mode

In computer programming, the adapter pattern (sometimes called wrapper style or wrapper) adapts the interface of a class to what users expect. An adaptation allows classes that usually cannot work together because of incompatible interfaces to work together by wrapping the class's own interface in an existing class.

The adapter mode is mainly used when the method defined in the interface cannot meet the customer's requirements, or the name of the method defined in the interface or the method interface conflicts with the customer's requirements.

Two types of patterns: Object Adapter Pattern - in this adapter pattern, the adapter holds an instance of the class it wraps around. In this case, the adapter calls the physical entity of the wrapped object. Class adapter mode - in this adapter mode, the adapter inherits its own implemented classes (generally multiple inheritance).

The adapter does not have data rate conversion.
In computer programming, adapters include: container adapter, iterator adapter, functional adapter, etc.