This page will contain some of the frequently asked questions. 

A String is a sequence of characters (e.g. "Hello World").

A String is an object in java, and not a primitive. 

Creating Strings

We can create a String object in two ways:

1. Assigning a String literal to a String variable

   • e.g. String greeting = "Hello world!";

   • Here, "Hello world!" is a string literal.

We will see how to communicate between a server and a client using simple network programming using sockets. You can get started with socket programming. Also, a simple client server program might be needed in many situations; you can just copy paste the basic code below and add to it.

We will create a simple server that accepts a client and sends a string message to the client. Client simply prints the message from server in the console.

Bottom-up web service development components

Important participants in a bottom up SOAP based web service implementation are:

• Service Endpoint Interface (SEI) 

• Service Implementation Bean (SIB)  

• Any publisher.

Factory pattern is a design pattern used to create objects. Similar to a car factory that creates different models of cars, an object factory will create different type of objects. The abstract factory pattern provides a way to encapsulate a group of similar or related factories. Hence the abstract factory can be considered as a factory of factories.