A classic Java interface instance

Source: Internet
Author: User
Code
Import Java. Io. * ;
Interface Car
{
Void Start ();
Void Stop ();
}
Class Smallcar Implements Car
{
Public   Void Start ()
{
System. Out. println ( " Smallcar start " );
}
Public   Void Stop ()
{
System. Out. println ( " Smallcar stop! " );
}
}
Class Bigcar Implements Car
{
Public   Void Start ()
{
System. Out. println ( " Bigcar start " );
}
Public   Void Stop ()
{
System. Out. println ( " Bigcar stop! " );
}
}
Class Testcar
{
Public   Void Opercar (car c)
{
C. Start ();
C. Stop ();
}
}
Public   Class Testinterface
{
Public   Static   Void Main (string [] ARGs)
{
Testcar TC = New Testcar ();
Smallcar SC = New Smallcar ();
Bigcar BC =   New Bigcar ();
TC. opercar (SC );
TC. opercar (BC );
}
}

Similar to the pure virtual function in C ++, the interface is to provide some empty methods, and then define the content by using the method of this interface when it is used.
Note that all methods of the interface must be implemented to use the interface.

Related Article

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.