An interface is a prototype for a class. The class may contains non-implemented method as well as no member variables (i.e. no variable declaration). The syntax for creating interfaces is :-
interface interface_name
{
//statements
}
The syntex for implementing interfaces using "implements" keyword is :-
class class_name implements interface_name
{
//statements
}
yes we can define a variable in an interface in java.
Java Swings was introduced in 1997.
Runnable interface
According to a beginner's book on Java, an interface can't have constructors. Also, the interface itself can't contain the method implementation.
Yes, it is possible to write a keylogger in Java, but you would need to use the Java Native Interface to do so.
API is an Application Programming Interface..that means Some collection for designing concept for GUI(Graphical User INterface) By Saravanan
yes we can define a variable in an interface in java.
NO, we cannot create a contructor for an interface in java.
Java Swings was introduced in 1997.
interface is a list of methods which implements that interface
A tagging interface type in Java is an interface that has not defined methods such as the java.io.Serializable interface.
Runnable interface
Yes. This is a valid interface definition in Java: interface Useless {}
An interface in Java is like an abstract class, but there are no method bodies allowed in it and it has to be declared with the interface keyword. It is Java's way of getting around the Deadly Diamond of Death. Only abstract methods and constants are allowed in it.
In Java, Java does support the concept of destructor, it's done via special method finalize.
Interface is collection of abstract methods which has only declaration and no implementation
Interface Java can be used for a variety of tasks and commands such as .swf files, Java files, running scripts, as well as website video players for websites.