The Java I/O means Java Input/Output. It is provided by the java.io package. This package has an InputStream and OutputStream. Java InputStream is defined for reading the stream, byte stream and array of byte stream.
What is Java I/O? The Java I/O means Java Input/Output. It is provided by the java.io
package. This package has an InputStream and OutputStream. Java InputStream is
defined for reading the stream, byte stream and array of byte stream.
Reading Text from
the Standard Input
Java provides the standard I/O facilities for reading text through
either from the file or from the keyboard on command line. This program illustrates how to use standard input to read the user input.
Working With
the Files The File class deals with the
machine dependent files in a machine-independent manner i.e. it is easier to write
platform-independent code that examines and manipulates files using the File
class. This class is available in the java.lang
package.
Working with a Directory
In the section, you will learn
how a directory is created. Apart from this, you will also be aware
from some manipulations that are performed
on a directory.
Filter I/O Streams Like I/O streams, Filter streams
are also used to
manipulate the data reading from an underlying stream.. Apart from this,
it allows the user to make a chain using
multiple input stream so that, the operations that are to be applied
on this chain, may create a combine effects on
several filters.
Overview of I/O Data Streams Data streams are filtered streams that perform binary
I/O operation on primitive data type values ( boolean, char, byte, short, int,
long, etc.) as well as on String values. If
you need to work with data that is not represented as bytes or characters then
you can use Data Streams.
Using a Random Access
File
n this section, you will learn about the Random Access File
class
provided by java. io package. This is a class that allows you to read
and write arbitrary bytes, text, and primitive Java data types from or
to any specified location in a file.
Converting
a Filename Path to a URL
In this section, you will learn, how a Filename
path is converted to a URL and vice versa . URL stands for Uniform
Resource Locator.
Making Tokens of a Java Source Code In Java, The StreamTokenizer class is used for simple
parsing of a Java source file into tokens. This class takes an input
stream, breaks up the ASCII text in a file and parses it into
"tokens". It allows the tokens to be read one at a time.
Introduction to Encoding Java programs use Unicode text internally.
It supports standard UTF-8 when reading and writing strings
through the InputStreamReader and the OutputStreamWriter.
Serializing
an Object Serialization is the process of saving an object in a storage
medium (such as a file, or a memory buffer) or to transmit it over a
network connection in binary form.
Deserializing an
Object
The opposite operation of the serialization is called deserialization
i.e. to extracting the data from a series of bytes is s known as deserialization
Delete file or Directory In this example we are discussing the deletion of a
file or a directory by using a java program. We pass the file name or the
directory name to which we want to delete.
URL file Download and Save in the Local Directory This Program file download from URL and save this Url File in the
specified directory. This program specifies the directory path where the files to
be stored as first command line argument and second command line arguments
specifies URL File to be stored.
rashmi rani
August 20, 2011
java
java aii programing(question with ans)
manoj nainwal
August 26, 2011
about boolean variable ...
any one plz tell me about the boolean variable in java...
howz it work in computer if its numeric representation is not present , becozz our computer just process 0 & 1 ...
and also how much space are allocated when we initializes a boolean variable........??????
ä¸?æ??
December 12, 2011
www.yybook.org
good job
sethuraman
March 23, 2012
i like this web site
very useful of this notes
ali baba
June 16, 2012
my name is ali baba
no comments...do you have??? ;-) :D
santosh
August 2, 2012
searching file using java
import java.io.File;
import java.util.Scanner;
public class FileExists {
public static void main(String[] s) {
Scanner scanner = new Scanner(System.in);
System.out.print("Enter the url of a file: ");
System.out.flush();
String filename = scanner.nextLine();
File file = new File(filename);
if(file.exists()){System.out.println("exists");}
else{System.out.println("not exists");}
}
}
output1:
Enter the url of a file: C:\Users\298564\Desktop\sa.txt
exists
output2:
Enter the url of a file: C:\Users\298564\Desktop\asdfs.txt
not exists
navinaar
September 5, 2012
miracle ma :D
wow;)
RAM33
October 1, 2012
getting a input
what are different ways in java to get inputs
and the most simplest way?
Rajyalaxmi
December 3, 2012
java.io package
We have Scanner class in io then what is the need of Console class?
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