conversations.from: human
conversations.value: What could be a title for a book about Java, Joy, ACM with the genre: Computers & Technology, Networking & Cloud Computing?
conversations.from: assistant
conversations.value: A title for this book could be 'An Introduction to Network Programming with Java'
conversations.from: human
conversations.value: Give me the first five paragraphs for the book.
conversations.from: assistant
conversations.value: An Introduction to Network Programming with Java
  Recent years have witnessed an explosion in the growth and use of the Internet. As a result, there has arisen a need for a programming language with features designed specifically for network programming. Java provides these features and does so in a platform-independent manner, which is vital for a heterogeneous network such as the Internet. Java is sometimes referred to as 'the language of the Internet' and it is the use of Java in this context that has had a major influence on the popularisation of the language. For many programmers, the need to program for the Internet is one of the main reasons, if not the reason, for learning to program in Java.
  Whatever the service provided by a server, there must be some established protocol governing the communication that takes place between server and client. Each end of the dialogue must know what may/must be sent to the other, the format in which it should be sent, the sequence in which it must be sent (if sequence matters) and, for 'open-ended' dialogues, how the dialogue is to be terminated. For the standard services, such protocols are made available in public documents, usually by either the Internet Engineering Task Force (IETF) or the World Wide Web Consortium (W3C). Some of the more common services and their associated ports are shown in Table 1.1. For a more esoteric or 'bespoke' service, the application writer must establish a protocol and convey it to the intended users of that service.
  A URL (Uniform Resource Locator) is a unique identifier for any resource located on the Internet. It has the following structure (in which BNF notation is used):
  For a well-known protocol, the port number may be omitted and the default port number will be assumed. Thus, since the example above specifies the HTTP protocol (the protocol of the Web) and does not specify on which port of the host machine the service is available, it will be assumed that the service is running on port 80 (the default port for Web servers). If the file name is omitted, then the server sends a default file from the directory specified in the path name. (This default file will commonly be called index.html or default.html.) The 'section' part of the URL (not often specified) indicates a named 'anchor' in an HTML document. For example, the HTML anchor in the tag
  Since human beings are generally much better at remembering meaningful strings of characters than they are at remembering long strings of numbers, the Domain Name System was developed. A domain name, also known as a host name, is the user-friendly equivalent of an IP address. In the previous example of a URL, the domain name was www.​oracle.​com. The individual parts of a domain name don't correspond to the individual parts of an IP address. In fact, domain names don't always have four parts (as IPv4 addresses must have).
conversations.from: human
conversations.value: Give me five more paragraphs.
conversations.from: assistant
conversations.value: Before proceeding further, it is worth pointing out that the full range of SQL types is represented in class java.sql.Types as a series of 28 named static integer (int) constants. The 8 that are likely to be of most use are listed below.
  INTEGER and VARCHAR are particularly commonplace, the latter of these corresponding to string values.
  The example coming up makes use of the following ResultSetMetaData methods, which return properties of the database fields held in a ResultSetMetaData object.
  The basic purpose of each of these methods is fairly self-evident, but the distinction between the last two is worth clarifying. Method getColumnType returns the selected field's SQL type as an integer matching one of the named constants in class java.sql.Types, while method getColumnTypeName returns the string holding the database-specific type name for the selected field. Now for the example...
  This example uses the Accounts table in our Finances database to retrieve all data relating to account number 12345. It then uses the above methods to display the name of each field, its database-specific type name and the value held (after ascertaining the field's data type, so that the appropriate Java getXXX method can be called).
conversations.from: human
conversations.value: Give me the last four paragraphs.
conversations.from: assistant
conversations.value: This will return the named attribute(s) for all rows in the named table satisfying the specified condition. Often, all attributes are required, so the asterisk character is provided to allow this requirement to be expressed in a shorthand form.
  By default, the order will be ascending (which can be specified explicitly by adding the ORDER BY clause with the qualifier ASC ). If we want descending order, then we can use the ORDER BY clause with the specifier DESC. For example:
  If any attributes are missing, then the row created has default values for these. The most common default value is NULL. If no attributes are listed, then values for all attributes must be supplied. For example:
  It is most commonly used to delete a single row from a table, usually by specifying its primary key in the condition. For example:
conversations.from: human
conversations.value: Delete the first sentence.
conversations.from: assistant
conversations.value: Often, all attributes are required, so the asterisk character is provided to allow this requirement to be expressed in a shorthand form.
  By default, the order will be ascending (which can be specified explicitly by adding the ORDER BY clause with the qualifier ASC ). If we want descending order, then we can use the ORDER BY clause with the specifier DESC. For example:
  If any attributes are missing, then the row created has default values for these. The most common default value is NULL. If no attributes are listed, then values for all attributes must be supplied. For example:
  It is most commonly used to delete a single row from a table, usually by specifying its primary key in the condition. For example: