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Constants and abstract methods. That's it.
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∙ 12y ago
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What kind of files contain java souce code?
Those files have the extension .java
What kind of file contain java source code?
'.java' files contain java source code. One can access these files on windows by using 'notepad'.
Is interface in java is a kind of polymorphism?
In a sense, yes, but polymorphism usually refers to an objects ability to have different behaviors than that of it's parent class. Using an interface among multiple classes ensures that all subclasses have to implement those methods, and thus the objects could be stored in an instance of the superclass to allow for dynamic programming.
Abstract class vs interface?
Comparison between an Abstract Class and an Interface:While an abstract class can define both abstract and non-abstract methods, an interface can have only abstract methods. Another way interfaces differ from abstract classes is that interfaces have very little flexibility in how the methods and variables defined in the interface are declared. These rules are strict:
What is blue j?
blue j is a kind of java program
When to use interface?
Interfaces are a way of imposing a type of functionality on all other java classes that are created using it. It is kind of a template that all child classes using this template must follow. All methods that are declared in an interface must be implemented by the child classes and hence the functionality offered by these classes can be controlled using them. Interfaces are a powerful tool that java provides to achieve multiple inheritance.
Why is interfaces used in java?
Interfaces are a way of imposing a type of functionality on all other java classes that are created using it. It is kind of a template that all child classes using this template must follow. All methods that are declared in an interface must be implemented by the child classes and hence the functionality offered by these classes can be controlled using them. Interfaces are a powerful tool that java provides to achieve multiple inheritance.
Is Interfaces in Java a kind of polymorphism?
No. Interfaces in Java are a construct to get polymorphism ( subtype polymorphism ) working in Java, but they are not a "kind" of polymorphism. In polymorphism happens when two objects respond to the same message ( method call ) in different way ( hence poly -> many, morphism -> way or shape : polymorphism -> many ways). In Java to be able to send the same message to two different objects you have to either inherit the same parent, or implement the same interface.
What is difference between interface and abstract in java?
While an abstract class can define both abstract and non-abstract methods, an interface can have only abstract methods. Another way interfaces differ from abstract classes is that interfaces have very little flexibility in how the methods and variables defined in the interface are declared. These rules are strict: • All interface methods are implicitly public and abstract. In other words, you do not need to actually type the public or abstract modifiers in the method declaration, but the method is still always public and abstract. (You can use any kind of modifiers in the Abstract class) • All variables defined in an interface must be public, static, and final-in other words, interfaces can declare only constants, not instance variables. • Interface methods must not be static. • Because interface methods are abstract, they cannot be marked final, strictfp, or native. (More on these modifiers later.) • An interface can extend one or more other interfaces. • An interface cannot extend anything but another interface. • An interface cannot implement another interface or class. • An interface must be declared with the keyword interface. You must remember that all interface methods are public and abstract regardless of what you see in the interface definition.
What kind of interface does hardware and software together form?
user interface
What kind of files contain java souce code?
Those files have the extension .java
Is Interface is a kind of abstract method?
No
What version of java was used in 1995?
what version of java was used in 1995 and what kind of database was used along with java from 1995 to 1998?
What kind of application uses java?
Games
What kind of file contain java source code?
'.java' files contain java source code. One can access these files on windows by using 'notepad'.
Is interface in java is a kind of polymorphism?
In a sense, yes, but polymorphism usually refers to an objects ability to have different behaviors than that of it's parent class. Using an interface among multiple classes ensures that all subclasses have to implement those methods, and thus the objects could be stored in an instance of the superclass to allow for dynamic programming.
What kind of physical interface does the router have?
AUI
