Explain about 3-tier architecture in Java

ROOPESH JAMES

• May 21st, 2012

A three-tier architecture is any system which enforces a general separation between the following three parts: 1. Client Tier or user interface 2. Middle Tier or business logic 3. Data Storage Tie...

atilakmca

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• Sep 27th, 2007

middle tier is primarly based on processing the bussiness logic. The main idea of dividing into tiers is like the application developer can concentrate on specific tier in developing webapplicati...

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1.what is meant by inheritance,single inhertiance,multiple inheritance?2.define abstract class & abstract method?3.how to developed and delopying a SERVELT,JSP program in the TOMCAT APACHE SERVER,WEBLOGIC SERVER?PLZ send the answer for the particular abo

sivapurammani

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• Jan 23rd, 2014

Inheritance :: Inheriting the properties and actions(methods) of Super class to Sub-class is the main concept of Inheritance. In java by using extends or implements are the two ways we can go for the ...

harps

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• Nov 20th, 2012

Single Inheritance in Java means that a sub class have the capability of inheriting the properties of only one class whereas multiple inheritance is not supported by Java as it increases the complexit...

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vishal

• Sep 21st, 2017

Pointers are such kind of data types who holds the Memory address of another variable. Use of pointer may leads in security violation. Pointers works on memory addresses directly and we cannot apply s...

sopan

• Feb 27th, 2017

When Pointer are used, it is then capable to change the memory data and get RAM memory is more exposed to pointers.
This concept collapse the memory management in JVM.
So pointers is not used. Also we don't need pointers as complete memory management is managed by JVM only.

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What is the scope for this class?

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dipl. ing. Dan  

 Profile Answers by dipl. ing. Dan Questions by dipl. ing. Dan

• Member Since Mar-2006 | Mar 24th, 2006

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Some people might get confused by the many posts. The correct answer to the question "can we declare class as protected?" is YES, BUT only as an inner class. A 'normal' class cannot be protected or private.

// 'Normal' class - only default or public allowed

public class ProtectedOrNot {

  // Inner class - public, default, protected, private allowed

  protected class InnerClass {

  }

  public static void main(String[] args) {

  }

}

vishal

• Sep 21st, 2017

We cannot declare primary classes as protected for primary classes only "public","final","abstract" are allowed. But point to be noted you can declare inner classes as protected. ...

Srinu

• Jul 8th, 2017

We cannot declare class as protected and private it gives compile time error.
Illegal modifier for the class TestClass; only public, abstract & final are permitted

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