Java Doc for FileInputStream.java in  » 6.0-JDK-Modules » j2me » java » io » Java Source Code / Java DocumentationJava Source Code and Java Documentation

Java Source Code / Java Documentation
1. 6.0 JDK Core
2. 6.0 JDK Modules
3. 6.0 JDK Modules com.sun
4. 6.0 JDK Modules com.sun.java
5. 6.0 JDK Modules sun
6. 6.0 JDK Platform
7. Ajax
8. Apache Harmony Java SE
9. Aspect oriented
10. Authentication Authorization
11. Blogger System
12. Build
13. Byte Code
14. Cache
15. Chart
16. Chat
17. Code Analyzer
18. Collaboration
19. Content Management System
20. Database Client
21. Database DBMS
22. Database JDBC Connection Pool
23. Database ORM
24. Development
25. EJB Server geronimo
26. EJB Server GlassFish
27. EJB Server JBoss 4.2.1
28. EJB Server resin 3.1.5
29. ERP CRM Financial
30. ESB
31. Forum
32. GIS
33. Graphic Library
34. Groupware
35. HTML Parser
36. IDE
37. IDE Eclipse
38. IDE Netbeans
39. Installer
40. Internationalization Localization
41. Inversion of Control
42. Issue Tracking
43. J2EE
44. JBoss
45. JMS
46. JMX
47. Library
48. Mail Clients
49. Net
50. Parser
51. PDF
52. Portal
53. Profiler
54. Project Management
55. Report
56. RSS RDF
57. Rule Engine
58. Science
59. Scripting
60. Search Engine
61. Security
62. Sevlet Container
63. Source Control
64. Swing Library
65. Template Engine
66. Test Coverage
67. Testing
68. UML
69. Web Crawler
70. Web Framework
71. Web Mail
72. Web Server
73. Web Services
74. Web Services apache cxf 2.0.1
75. Web Services AXIS2
76. Wiki Engine
77. Workflow Engines
78. XML
79. XML UI
Java
Java Tutorial
Java Open Source
Jar File Download
Java Articles
Java Products
Java by API
Photoshop Tutorials
Maya Tutorials
Flash Tutorials
3ds-Max Tutorials
Illustrator Tutorials
GIMP Tutorials
C# / C Sharp
C# / CSharp Tutorial
C# / CSharp Open Source
ASP.Net
ASP.NET Tutorial
JavaScript DHTML
JavaScript Tutorial
JavaScript Reference
HTML / CSS
HTML CSS Reference
C / ANSI-C
C Tutorial
C++
C++ Tutorial
Ruby
PHP
Python
Python Tutorial
Python Open Source
SQL Server / T-SQL
SQL Server / T-SQL Tutorial
Oracle PL / SQL
Oracle PL/SQL Tutorial
PostgreSQL
SQL / MySQL
MySQL Tutorial
VB.Net
VB.Net Tutorial
Flash / Flex / ActionScript
VBA / Excel / Access / Word
XML
XML Tutorial
Microsoft Office PowerPoint 2007 Tutorial
Microsoft Office Excel 2007 Tutorial
Microsoft Office Word 2007 Tutorial
Java Source Code / Java Documentation » 6.0 JDK Modules » j2me » java.io 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


java.lang.Object
   java.io.InputStream
      java.io.FileInputStream

All known Subclasses:   java.net.SocketInputStream,
FileInputStream
public class FileInputStream extends InputStream (Code)
A FileInputStream obtains input bytes from a file in a file system. What files are available depends on the host environment.

FileInputStream is meant for reading streams of raw bytes such as image data. For reading streams of characters, consider using FileReader.
version:
   1.45, 02/02/00
See Also:   java.io.File
See Also:   java.io.FileDescriptor
See Also:   java.io.FileOutputStream
since:
   JDK1.0




Constructor Summary
public  FileInputStream(String name)
     Creates a FileInputStream by opening a connection to an actual file, the file named by the path name name in the file system.
public  FileInputStream(File file)
     Creates a FileInputStream by opening a connection to an actual file, the file named by the File object file in the file system.
public  FileInputStream(FileDescriptor fdObj)
     Creates a FileInputStream by using the file descriptor fdObj, which represents an existing connection to an actual file in the file system.

If there is a security manager, its checkRead method is called with the file descriptor fdObj as its argument to see if it's ok to read the file descriptor.


Method Summary
native public  intavailable()
     Returns the number of bytes that can be read from this file input stream without blocking.
public  voidclose()
     Closes this file input stream and releases any system resources associated with the stream.
protected  voidfinalize()
     Ensures that the close method of this file input stream is called when there are no more references to it.
final public  FileDescriptorgetFD()
     Returns the FileDescriptor object that represents the connection to the actual file in the file system being used by this FileInputStream.
native public  intread()
     Reads a byte of data from this input stream.
public  intread(byte b)
     Reads up to b.length bytes of data from this input stream into an array of bytes.
public  intread(byte b, int off, int len)
     Reads up to len bytes of data from this input stream into an array of bytes.
native public  longskip(long n)
     Skips over and discards n bytes of data from the input stream.


Constructor Detail
FileInputStream
public FileInputStream(String name) throws FileNotFoundException(Code)
Creates a FileInputStream by opening a connection to an actual file, the file named by the path name name in the file system. A new FileDescriptor object is created to represent this file connection.

First, if there is a security manager, its checkRead method is called with the name argument as its argument.

If the named file does not exist, is a directory rather than a regular file, or for some other reason cannot be opened for reading then a FileNotFoundException is thrown.
Parameters:
  name - the system-dependent file name.
exception:
  FileNotFoundException - if the file does not exist,is a directory rather than a regular file,or for some other reason cannot be opened forreading.
exception:
  SecurityException - if a security manager exists and itscheckRead method denies read accessto the file.
See Also:   java.lang.SecurityManager.checkRead(java.lang.String)




FileInputStream
public FileInputStream(File file) throws FileNotFoundException(Code)
Creates a FileInputStream by opening a connection to an actual file, the file named by the File object file in the file system. A new FileDescriptor object is created to represent this file connection.

First, if there is a security manager, its checkRead method is called with the path represented by the file argument as its argument.

If the named file does not exist, is a directory rather than a regular file, or for some other reason cannot be opened for reading then a FileNotFoundException is thrown.
Parameters:
  file - the file to be opened for reading.
exception:
  FileNotFoundException - if the file does not exist,is a directory rather than a regular file,or for some other reason cannot be opened forreading.
exception:
  SecurityException - if a security manager exists and itscheckRead method denies read access to the file.
See Also:   java.io.File.getPath
See Also:   java.lang.SecurityManager.checkRead(java.lang.String)




FileInputStream
public FileInputStream(FileDescriptor fdObj)(Code)
Creates a FileInputStream by using the file descriptor fdObj, which represents an existing connection to an actual file in the file system.

If there is a security manager, its checkRead method is called with the file descriptor fdObj as its argument to see if it's ok to read the file descriptor. If read access is denied to the file descriptor a SecurityException is thrown.

If fdObj is null then a NullPointerException is thrown.
Parameters:
  fdObj - the file descriptor to be opened for reading.
throws:
  SecurityException - if a security manager exists and itscheckRead method denies read access to thefile descriptor.
See Also:   SecurityManager.checkRead(java.io.FileDescriptor)





Method Detail
available
native public int available() throws IOException(Code)
Returns the number of bytes that can be read from this file input stream without blocking. the number of bytes that can be read from this file inputstream without blocking.
exception:
  IOException - if an I/O error occurs.



close
public void close() throws IOException(Code)
Closes this file input stream and releases any system resources associated with the stream.

If this stream has an associated channel then the channel is closed as well.
exception:
  IOException - if an I/O error occurs.




finalize
protected void finalize() throws IOException(Code)
Ensures that the close method of this file input stream is called when there are no more references to it.
exception:
  IOException - if an I/O error occurs.
See Also:   java.io.FileInputStream.close



getFD
final public FileDescriptor getFD() throws IOException(Code)
Returns the FileDescriptor object that represents the connection to the actual file in the file system being used by this FileInputStream. the file descriptor object associated with this stream.
exception:
  IOException - if an I/O error occurs.
See Also:   java.io.FileDescriptor



read
native public int read() throws IOException(Code)
Reads a byte of data from this input stream. This method blocks if no input is yet available. the next byte of data, or -1 if the end of thefile is reached.
exception:
  IOException - if an I/O error occurs.



read
public int read(byte b) throws IOException(Code)
Reads up to b.length bytes of data from this input stream into an array of bytes. This method blocks until some input is available.
Parameters:
  b - the buffer into which the data is read. the total number of bytes read into the buffer, or-1 if there is no more data because the end ofthe file has been reached.
exception:
  IOException - if an I/O error occurs.



read
public int read(byte b, int off, int len) throws IOException(Code)
Reads up to len bytes of data from this input stream into an array of bytes. This method blocks until some input is available.
Parameters:
  b - the buffer into which the data is read.
Parameters:
  off - the start offset of the data.
Parameters:
  len - the maximum number of bytes read. the total number of bytes read into the buffer, or-1 if there is no more data because the end ofthe file has been reached.
exception:
  IOException - if an I/O error occurs.



skip
native public long skip(long n) throws IOException(Code)
Skips over and discards n bytes of data from the input stream. The skip method may, for a variety of reasons, end up skipping over some smaller number of bytes, possibly 0. The actual number of bytes skipped is returned.
Parameters:
  n - the number of bytes to be skipped. the actual number of bytes skipped.
exception:
  IOException - if an I/O error occurs.



Methods inherited from java.io.InputStream
public int available() throws IOException(Code)(Java Doc)
public void close() throws IOException(Code)(Java Doc)
public synchronized void mark(int readlimit)(Code)(Java Doc)
public boolean markSupported()(Code)(Java Doc)
abstract public int read() throws IOException(Code)(Java Doc)
public int read(byte b) throws IOException(Code)(Java Doc)
public int read(byte b, int off, int len) throws IOException(Code)(Java Doc)
public synchronized void reset() throws IOException(Code)(Java Doc)
public long skip(long n) throws IOException(Code)(Java Doc)

Methods inherited from java.lang.Object
public boolean equals(Object obj)(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

www.java2java.com | Contact Us
Copyright 2009 - 12 Demo Source and Support. All rights reserved.
All other trademarks are property of their respective owners.