Java write file to output stream

If the file contains data, the data will be erased. To keep the existing data and append the new data to the file, we need to use another constructor of the FileOutputStream class, which accepts a boolean flag for appending the new data to the file.

The FileOutputStream class has an overloaded write method to write data to a file. Popular Examples Check prime number. Print the Fibonacci series. Print Pyramids and Patterns. Multiply two matrices. Find the standard deviation. Reference Materials String. Start Learning Java. Explore Java Examples. Java OutputStreamWriter Class. Java ObjectOutputStream Class.

Java ObjectInputStream Class. It extends the OutputStream abstract class. Software Engineering. Web Technology. Cyber Security. C Programming. Control System. Data Mining. Data Warehouse. Javatpoint Services JavaTpoint offers too many high quality services.

FileOutputStream class declaration Let's see the declaration for Java. It is used to write ary. First, if there is a security manager, its checkWrite method is called with the path represented by the file argument as its argument. Parameters: file - the file to be opened for writing. Throws: FileNotFoundException - 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 SecurityException - if a security manager exists and its checkWrite method denies write access to the file.

See Also: File. Since: 1. String FileOutputStream public FileOutputStream FileDescriptor fdObj 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. Parameters: fdObj - the file descriptor to be opened for writing Throws: SecurityException - if a security manager exists and its checkWrite method denies write access to the file descriptor See Also: SecurityManager.

Implements the write method of OutputStream. Specified by: write in class OutputStream Parameters: b - the byte to be written. Overrides: write in class OutputStream Parameters: b - the data. See Also: OutputStream. This file output stream may no longer be used for writing bytes.