Package java.io

Class FileWriter

java.lang.Object
java.io.Writer
java.io.OutputStreamWriter
java.io.FileWriter
All Implemented Interfaces:
Closeable, Flushable, Appendable, AutoCloseable
public class FileWriter
extends OutputStreamWriter
A specialized Writer that writes to a file in the file system. All write requests made by calling methods in this class are directly forwarded to the equivalent function of the underlying operating system. Since this may induce some performance penalty, in particular if many small write requests are made, a FileWriter is often wrapped by a BufferedWriter.
See Also:
BufferedWriter, FileReader

  • Constructor Details

    • FileWriter

      public FileWriter​(File file) throws IOException
      Creates a FileWriter using the File file.
      Parameters:
      file - the non-null File to write bytes to.
      Throws:
      IOException - if file cannot be opened for writing.

    • FileWriter

      public FileWriter​(File file, boolean append) throws IOException
      Creates a FileWriter using the File file. The parameter append determines whether or not the file is opened and appended to or just opened and overwritten.
      Parameters:
      file - the non-null File to write bytes to.
      append - indicates whether or not to append to an existing file.
      Throws:
      IOException - if the file cannot be opened for writing.

    • FileWriter

      public FileWriter​(FileDescriptor fd)
      Creates a FileWriter using the existing FileDescriptor fd.
      Parameters:
      fd - the non-null FileDescriptor to write bytes to.

    • FileWriter

      public FileWriter​(String filename) throws IOException
      Creates a FileWriter using the platform dependent filename.
      Parameters:
      filename - the non-null name of the file to write bytes to.
      Throws:
      IOException - if the file cannot be opened for writing.

    • FileWriter

      public FileWriter​(String filename, boolean append) throws IOException
      Creates a FileWriter using the platform dependent filename. The parameter append determines whether or not the file is opened and appended to or just opened and overwritten.
      Parameters:
      filename - the non-null name of the file to write bytes to.
      append - indicates whether or not to append to an existing file.
      Throws:
      IOException - if the file cannot be opened for writing.