Java output file to directory

Java output file to directory

A file output stream is an output stream for writing data to a File or to a FileDescriptor . Whether or not a file is available or may be created depends upon the underlying platform. Some platforms, in particular, allow a file to be opened for writing by only one FileOutputStream (or other file-writing object) at a time. In such situations the constructors in this class will fail if the file involved is already open. FileOutputStream is meant for writing streams of raw bytes such as image data. For writing streams of characters, consider using FileWriter .

Constructor Summary

Creates a file output stream to write to the specified file descriptor, which represents an existing connection to an actual file in the file system.

Method Summary

Cleans up the connection to the file, and ensures that the close method of this file output stream is called when there are no more references to this stream.

Methods inherited from class java.io.OutputStream

Methods inherited from class java.lang.Object

Constructor Detail

FileOutputStream

public FileOutputStream(String name) throws FileNotFoundException

Creates a file output stream to write to the file with the specified name. A new FileDescriptor object is created to represent this file connection. First, if there is a security manager, its checkWrite method is called with name as its argument. If the file exists but is a directory rather than a regular file, does not exist but cannot be created, or cannot be opened for any other reason then a FileNotFoundException is thrown.

FileOutputStream

public FileOutputStream(String name, boolean append) throws FileNotFoundException

Creates a file output stream to write to the file with the specified name. If the second argument is true , then bytes will be written to the end of the file rather than the beginning. A new FileDescriptor object is created to represent this file connection. First, if there is a security manager, its checkWrite method is called with name as its argument. If the file exists but is a directory rather than a regular file, does not exist but cannot be created, or cannot be opened for any other reason then a FileNotFoundException is thrown.

FileOutputStream

public FileOutputStream(File file) throws FileNotFoundException

Creates a file output stream to write to the file represented by the specified File object. A new FileDescriptor object is created to represent this file connection. First, if there is a security manager, its checkWrite method is called with the path represented by the file argument as its argument. If the file exists but is a directory rather than a regular file, does not exist but cannot be created, or cannot be opened for any other reason then a FileNotFoundException is thrown.

FileOutputStream

public FileOutputStream(File file, boolean append) throws FileNotFoundException

Creates a file output stream to write to the file represented by the specified File object. If the second argument is true , then bytes will be written to the end of the file rather than the beginning. A new FileDescriptor object is created to represent this file connection. First, if there is a security manager, its checkWrite method is called with the path represented by the file argument as its argument. If the file exists but is a directory rather than a regular file, does not exist but cannot be created, or cannot be opened for any other reason then a FileNotFoundException is thrown.

FileOutputStream

Creates a file output stream to write to the specified file descriptor, which represents an existing connection to an actual file in the file system. First, if there is a security manager, its checkWrite method is called with the file descriptor fdObj argument as its argument. If fdObj is null then a NullPointerException is thrown. This constructor does not throw an exception if fdObj is invalid . However, if the methods are invoked on the resulting stream to attempt I/O on the stream, an IOException is thrown.

Источник

Class FileOutputStream

A file output stream is an output stream for writing data to a File or to a FileDescriptor . Whether or not a file is available or may be created depends upon the underlying platform. Some platforms, in particular, allow a file to be opened for writing by only one FileOutputStream (or other file-writing object) at a time. In such situations the constructors in this class will fail if the file involved is already open.

FileOutputStream is meant for writing streams of raw bytes such as image data. For writing streams of characters, consider using FileWriter .

Constructor Summary

Creates a file output stream to write to the specified file descriptor, which represents an existing connection to an actual file in the file system.

Method Summary

Methods declared in class java.io.OutputStream

Methods declared in class java.lang.Object

Constructor Details

FileOutputStream

Creates a file output stream to write to the file with the specified name. A new FileDescriptor object is created to represent this file connection. First, if there is a security manager, its checkWrite method is called with name as its argument. If the file exists but is a directory rather than a regular file, does not exist but cannot be created, or cannot be opened for any other reason then a FileNotFoundException is thrown.

FileOutputStream

Creates a file output stream to write to the file with the specified name. If the second argument is true , then bytes will be written to the end of the file rather than the beginning. A new FileDescriptor object is created to represent this file connection. First, if there is a security manager, its checkWrite method is called with name as its argument. If the file exists but is a directory rather than a regular file, does not exist but cannot be created, or cannot be opened for any other reason then a FileNotFoundException is thrown.

FileOutputStream

Creates a file output stream to write to the file represented by the specified File object. A new FileDescriptor object is created to represent this file connection. First, if there is a security manager, its checkWrite method is called with the path represented by the file argument as its argument. If the file exists but is a directory rather than a regular file, does not exist but cannot be created, or cannot be opened for any other reason then a FileNotFoundException is thrown.

FileOutputStream

Creates a file output stream to write to the file represented by the specified File object. If the second argument is true , then bytes will be written to the end of the file rather than the beginning. A new FileDescriptor object is created to represent this file connection. First, if there is a security manager, its checkWrite method is called with the path represented by the file argument as its argument. If the file exists but is a directory rather than a regular file, does not exist but cannot be created, or cannot be opened for any other reason then a FileNotFoundException is thrown.

FileOutputStream

Creates a file output stream to write to the specified file descriptor, which represents an existing connection to an actual file in the file system. First, if there is a security manager, its checkWrite method is called with the file descriptor fdObj argument as its argument. If fdObj is null then a NullPointerException is thrown. This constructor does not throw an exception if fdObj is invalid . However, if the methods are invoked on the resulting stream to attempt I/O on the stream, an IOException is thrown.

Источник

Java output file to directory

A file output stream is an output stream for writing data to a File or to a FileDescriptor . Whether or not a file is available or may be created depends upon the underlying platform. Some platforms, in particular, allow a file to be opened for writing by only one FileOutputStream (or other file-writing object) at a time. In such situations the constructors in this class will fail if the file involved is already open. FileOutputStream is meant for writing streams of raw bytes such as image data. For writing streams of characters, consider using FileWriter .

Constructor Summary

Creates a file output stream to write to the specified file descriptor, which represents an existing connection to an actual file in the file system.

Method Summary

Methods declared in class java.io.OutputStream

Methods declared in class java.lang.Object

Constructor Detail

FileOutputStream

public FileOutputStream​(String name) throws FileNotFoundException

Creates a file output stream to write to the file with the specified name. A new FileDescriptor object is created to represent this file connection. First, if there is a security manager, its checkWrite method is called with name as its argument. If the file exists but is a directory rather than a regular file, does not exist but cannot be created, or cannot be opened for any other reason then a FileNotFoundException is thrown.

FileOutputStream

public FileOutputStream​(String name, boolean append) throws FileNotFoundException

Creates a file output stream to write to the file with the specified name. If the second argument is true , then bytes will be written to the end of the file rather than the beginning. A new FileDescriptor object is created to represent this file connection. First, if there is a security manager, its checkWrite method is called with name as its argument. If the file exists but is a directory rather than a regular file, does not exist but cannot be created, or cannot be opened for any other reason then a FileNotFoundException is thrown.

FileOutputStream

public FileOutputStream​(File file) throws FileNotFoundException

Creates a file output stream to write to the file represented by the specified File object. A new FileDescriptor object is created to represent this file connection. First, if there is a security manager, its checkWrite method is called with the path represented by the file argument as its argument. If the file exists but is a directory rather than a regular file, does not exist but cannot be created, or cannot be opened for any other reason then a FileNotFoundException is thrown.

FileOutputStream

public FileOutputStream​(File file, boolean append) throws FileNotFoundException

Creates a file output stream to write to the file represented by the specified File object. If the second argument is true , then bytes will be written to the end of the file rather than the beginning. A new FileDescriptor object is created to represent this file connection. First, if there is a security manager, its checkWrite method is called with the path represented by the file argument as its argument. If the file exists but is a directory rather than a regular file, does not exist but cannot be created, or cannot be opened for any other reason then a FileNotFoundException is thrown.

FileOutputStream

Creates a file output stream to write to the specified file descriptor, which represents an existing connection to an actual file in the file system. First, if there is a security manager, its checkWrite method is called with the file descriptor fdObj argument as its argument. If fdObj is null then a NullPointerException is thrown. This constructor does not throw an exception if fdObj is invalid . However, if the methods are invoked on the resulting stream to attempt I/O on the stream, an IOException is thrown.

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