THE PACKAGE JAVA.IO

java.io.FileInputStream

22.4

First, if there is a security manager, its

checkRead

 method ( 20.17.19) is

called with the path represented by the

file

 argument as its argument.

If the actual file cannot be opened, a

FileNotFoundException

 is thrown.

22.4.3

public FileInputStream(FileDescriptor fdObj)

throws SecurityException

This constructor initializes a newly created

FileInputStream

 by using the file

descriptor

fdObj

, which represents an existing connection to an actual file in the

file system.

First, if there is a security manager, its

checkRead

 method ( 20.17.18) is

called with the file descriptor

fdObj

 as its argument.

22.4.4

public final FileDescriptor getFD() throws IOException

This method returns the

FileDescriptor

 object ( 22.26) that represents the con 

nection to the actual file in the file system being used by this

FileInputStream

.

22.4.5

public int read() throws IOException;

The byte for this operation is read from the actual file with which this file input

stream is connected.

Implements the

read

 method of

InputStream

 ( 22.3.1).

22.4.6

public int read(byte[] b)

throws IOException, NullPointerException

Bytes for this operation are read from the actual file with which this file input

stream is connected.

Overrides the

read

 method of

InputStream

 ( 22.3.2).

22.4.7

public int read(byte[] b, int off, int len)

throws IOException, NullPointerException,

IndexOutOfBoundsException

Bytes for this operation are read from the actual file with which this file input

stream is connected.

Overrides the

read

 method of

InputStream

 ( 22.3.3).

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