interface is just like a class. its contains abstract methods without any implementation and we cant create object for the class. we can only sub classed . used to achieved multiple inheritance in java.
In Java, you cannot compile an interface directly because interfaces themselves are not executable; they are meant to define a contract for classes that implement them. However, you can compile the interface along with the implementing classes. When you compile a Java program, the Java compiler generates bytecode for all classes and interfaces, which can then be executed by the Java Virtual Machine (JVM).
yes we can define a variable in an interface in java.
NO, we cannot create a contructor for an interface in java.
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
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.
Yes. This is a valid interface definition in Java: interface Useless {}
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.
Interface is collection of abstract methods which has only declaration and no implementation
maybe
According to a beginner's book on Java, an interface can't have constructors. Also, the interface itself can't contain the method implementation.