CORE-JAVA (Networking (I/O) ):

*[READ: Why-JAVA] *[Start-Learning-JAVA] *[Why-Java's-Hot] *[Start-Using-LINUX] *[Java-Q-&-A] *[Question] *[Java-SE-6-Doc] *[Struts-Doc] *[Java-Tutorial-Index] *[Java-Certification]
*[Tech.] *[Struts.] *[Servlet.] *[JSP.] *[EJB.] *[JNDI-JMS] *[SQL.] *[JDBC.]
CORE-JAVA: *[OOP] *[CLASS] *[ABSTRACT] *[EXCEPTIONS] *[THREADS] *[UTILS] *[PACKAGES] *[JVM] *[CASTING] *[NETWORKING] *[RMI-XML] *
* What is the purpose of the File class? (i/o)
The File class is used to create objects that provide access to the files and directories of a local file system.

* What class allows you to read objects directly from a stream? (i/o)
The ObjectInputStream class supports the reading of objects from input streams.

* What an I/O filter? (i/o)
An I/O filter is an object that reads from one stream and writes to another, usually altering the data in some way as it is passed from one stream to another.

* What is the difference between the File and RandomAccessFile classes? (i/o)
The File class encapsulates the files and directories of the local file system. The RandomAccessFile class provides the METHODS needed to directly ACCESS DATA contained in ANY PART of a file.

* What interface must an object implement before it can be written to a stream as an object? (i/o)
An object must implement the Serializable or Externalizable interface before it can be written to a stream as an object.

* What information is needed to create a TCP Socket? (I/O)
The Local System's IP Address and Port Number. And the Remote System’s IP Address and Port Number.

* What value does read() return when it has reached the end of a file? (i/o)
The read() method returns -1 when it has reached the end of a file.

* What is the difference between the Reader/Writer class hierarchy and the InputStream/OutputStream class hierarchy? (i/o)
The Reader/Writer class hierarchy is CHARACTER-oriented, and the InputStream/OutputStream class hierarchy is BYTE-oriented.

* What value does readLine() return when it has reached the end of a file?
The readLine() method returns NULL when it reaches the end of a file.

* * * * * * * * * * * * *
*[Read:Religion-of-the-Universe.] *[Religion-and-cast.] *[Putting-our-sincere-efforts.] *[Blind-Men-And-The-Elephant.]

Here is a small "Story of grandpa" to explain what's the "Logic of good and bad".

Read:
Perceptions.
*Issue-of-Illegal-Immigration. *To-which-religion-does-this-universe-belongs-to? *Law-and-order-helps-to-maintain-justice. *Implementing-regulations-by-justice. *Puttting-our-sincere-efforts. *Religion-and-cast. *Impact-of-reservation-based-on-religion-and-cast. *Free-and-Fare-Education-system/Electoral-system.