What is Externalizable?

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Externalizable is an Interface that extends Serializable Interface. And sends data into Streams in Compressed Format. It has two methods, writeExternal(ObjectOuput out) and readExternal(ObjectInput in)

2013-02-05, 2305👍, 0💬

What are some alternatives to inheritance?
What are some alternatives to inheritance? Delegation is an alternative to inheritance. Delegation means that you include an instance of another class as an instance variable, and forward messages to the instance. It is often safer than inheritance because it forces you to think about each message y... 2013-02-08, 2437👍, 0💬

What modifiers are allowed for methods in an Interface?
What modifiers are allowed for methods in an Interface? Only public and abstract modifiers are allowed for methods in interfaces. 2013-02-06, 2334👍, 0💬

What is Externalizable?
What is Externalizable? Externalizable is an Interface that extends Serializable Interface. And sends data into Streams in Compressed Format. It has two methods, writeExternal(ObjectOuput out) and readExternal(ObjectInput in) 2013-02-05, 2306👍, 0💬

What is a local, member and a class variable?
What is a local, member and a class variable? Variables declared within a method are "local" variables. Variables declared within the class i.e not within any methods are "member" variables (global variables). Variables declared within the class i.e not within any methods and are defined as "static"... 2013-02-06, 2289👍, 0💬

What is the difference between an if statement and a switch statement?
What is the difference between an if statement and a switch statement? The if statement is used to select among two alternatives. It uses a boolean expression to decide which alternative should be executed. The switch statement is used to select among multiple alternatives. It uses an int expression... 2013-02-01, 2276👍, 0💬

Can an Interface have an inner class?
Can an Interface have an inner class? Yes public interface abc { static int i=0; void dd(); class a1 { a1() { int j; System.out.println("in interfia"); }; public static void main(String a1[]) { System.out.println("in interfia"); } } } 2013-02-04, 2253👍, 0💬

I made my class Cloneable but I still get 'Can't access protected method clone. Why?
I made my class Cloneable but I still get 'Can't access protected method clone. Why? Yeah, some of the Java books, in particular "The Java Programming Language", imply that all you have to do in order to have your class support clone() is implement the Cloneable interface. Not so. Perhaps that was t... 2013-02-07, 2243👍, 0💬

Can we define private and protected modifiers for variables in interfaces?
Can we define private and protected modifiers for variables in interfaces? Yes. 2013-02-05, 2242👍, 0💬

Can an Interface be final?
Can an Interface be final? yes. 2013-02-04, 2230👍, 0💬

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