An overview of the java.io package
Introduction
This section introduces the java.iopackage.
Here are some basic points about I/O:
* Data in files on your system is called persistent data because it persists after the
program runs.
* Files are created through streams in Java code.
* A stream is a linear, sequential flow of bytes of input or output data.
* Streams are written to the file system to create files.
* Streams can also be transferred over the Internet.
* Three streams are created for us automatically:
Syst*em.out - standard output stream
Syst*em.in - standard input stream
Syst*em.err - standard error
* Input/output on the local file system using applets is dependent on the browser's
security manager. Typically, I/O is not done using applets. On the other hand,
stand-alone applications have no security manager by default unless the developer has
added that functionality.
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Introduction
This section introduces the java.iopackage.
Here are some basic points about I/O:
* Data in files on your system is called persistent data because it persists after the
program runs.
* Files are created through streams in Java code.
* A stream is a linear, sequential flow of bytes of input or output data.
* Streams are written to the file system to create files.
* Streams can also be transferred over the Internet.
* Three streams are created for us automatically:
Syst*em.out - standard output stream
Syst*em.in - standard input stream
Syst*em.err - standard error
* Input/output on the local file system using applets is dependent on the browser's
security manager. Typically, I/O is not done using applets. On the other hand,
stand-alone applications have no security manager by default unless the developer has
added that functionality.
Buy It Now
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