Oracle
docs.oracle.com › en › java › javase › 11 › docs › api › java.base › java › io › FileOutputStream.html
FileOutputStream (Java SE 11 & JDK 11 )
January 20, 2026 - 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 ...
GitHub
github.com › AdoptOpenJDK › openjdk-jdk11 › blob › master › src › java.base › share › classes › java › io › FileOutputStream.java
openjdk-jdk11/src/java.base/share/classes/java/io/FileOutputStream.java at master · AdoptOpenJDK/openjdk-jdk11
March 2, 2019 - import jdk.internal.misc.JavaIOFileDescriptorAccess; import sun.nio.ch.FileChannelImpl; · · /** * A file output stream is an output stream for writing data to a · * <code>File</code> or to a <code>FileDescriptor</code>. Whether or not ...
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Oracle
docs.oracle.com › en › java › javase › 11 › docs › api › java.base › java › io › OutputStream.html
OutputStream (Java SE 11 & JDK 11 )
January 20, 2026 - java.io.OutputStream · All Implemented Interfaces: Closeable, Flushable, AutoCloseable · Direct Known Subclasses: ByteArrayOutputStream, FileOutputStream, FilterOutputStream, ObjectOutputStream, PipedOutputStream · public abstract class OutputStream extends Object implements Closeable, Flushable ·
Oracle
docs.oracle.com › en › java › javase › › 11 › docs › api › java.base › java › io › FileInputStream.html
FileInputStream (Java SE 11 & JDK 11 )
January 20, 2026 - File, FileDescriptor, FileOutputStream, Files.newInputStream(java.nio.file.Path, java.nio.file.OpenOption...) mark, markSupported, nullInputStream, readAllBytes, readNBytes, readNBytes, reset, transferTo · clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait ·
DocStore
docstore.mik.ua › orelly › java › fclass › ch11_21.htm
[Chapter 11] FileOutputStream
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Web PopGen
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Uses of Class java.io.FileOutputStream (Java SE 11 & JDK 11 )
Report a bug or suggest an enhancement For further API reference and developer documentation see the Java SE Documentation, which contains more detailed, developer-targeted descriptions with conceptual overviews, definitions of terms, workarounds, and working code examples.
Oracle
docs.oracle.com › en › java › javase › 21 › docs › api › java.base › java › io › FileOutputStream.html
FileOutputStream (Java SE 21 & JDK 21)
January 20, 2026 - 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 ...
Oracle
docs.oracle.com › en › java › javase › 11 › docs › api › java.base › java › io › OutputStreamWriter.html
OutputStreamWriter (Java SE 11 & JDK 11 )
January 20, 2026 - Each invocation of a write() method causes the encoding converter to be invoked on the given character(s). The resulting bytes are accumulated in a buffer before being written to the underlying output stream. Note that the characters passed to the write() methods are not buffered · For top ...
Jenkov
tutorials.jenkov.com › java-io › fileoutputstream.html
Java FileOutputStream
August 28, 2019 - OutputStream output = new FileOutputStream("c:\\data\\output-text.txt"); There is a constructor that takes 2 parameters too: The file name and a boolean. The boolean indicates whether to append to the file or not. Thus, a value of true means that you want to append to the file, whereas a value of false means you want to overwrite the file. Here are two Java FileOutputStream constructor examples:
Oracle
docs.oracle.com › en › java › javase › 17 › docs › api › java.base › java › io › FileOutputStream.html
FileOutputStream (Java SE 17 & JDK 17)
April 21, 2026 - FileOutputStream is meant for writing streams of raw bytes such as image data.
Microsoft Learn
learn.microsoft.com › en-us › dotnet › api › java.io.fileoutputstream
FileOutputStream Class (Java.IO) | Microsoft Learn
[Android.Runtime.Register("java/io/FileOutputStream", DoNotGenerateAcw=true)] public class FileOutputStream : Java.IO.OutputStream, IDisposable, Java.Interop.IJavaPeerable
Java
download.java.net › java › early_access › loom › docs › api › java.base › java › io › FileOutputStream.html
FileOutputStream (Java SE 25 & JDK 25 [build 1])
FileOutputStream is meant for writing streams of raw bytes such as image data.
W3Schools
w3schools.com › java › java_fileoutputstream.asp
Java FileOutputStream
Java Examples Java Videos Java ... files using FileWriter. The FileOutputStream class works in a similar way, but it writes data as raw bytes....
Stack Overflow
stackoverflow.com › questions › 29670915 › fileoutputstream
java - FileOutputStream - Stack Overflow
November 9, 2016 - public FileOutputStream(String name) throws FileNotFoundException { this(name != null ? new File(name) : null, false); } public FileOutputStream(String name, boolean append) throws FileNotFoundException { this(name != null ?
Oracle
docs.oracle.com › javase › 8 › docs › api › java › io › FileOutputStream.html
FileOutputStream (Java Platform SE 8 )
April 21, 2026 - FileOutputStream is meant for writing streams of raw bytes such as image data. For writing streams of characters, consider using FileWriter. ... File, FileDescriptor, FileInputStream, Files.newOutputStream(java.nio.file.Path, java.nio.file.OpenOption...)
javaspring
javaspring.net › blog › java-fileoutputstream
Java FileOutputStream: A Comprehensive Guide — javaspring.net
It allows developers to write data to a file. Whether you're saving user input, logging application events, or creating backup files, `FileOutputStream` provides a straightforward way to interact ...
Scaler
scaler.com › home › topics › fileoutputstream in java
FileOutputStream in Java| Scaler Topics
January 11, 2024 - FileOutputStream, a subclass of OutputStream, facilitates writing raw byte streams to files or storing data. Primarily used for writing primitive values, it supports both byte-oriented and character-oriented data. However, FileWriter is generally preferred for character-oriented data in Java.
Top answer 1 of 2
8
As noted by others, the benefit of the new method is that it isn't declared as throws IOException.
It was added in response to this issue JDK-8180410 "ByteArrayOutputStream should not throw IOExceptions". The stated rationale in the issue is simply that it makes no sense1 to have to write a try ... catch for an exception that will never be thrown. That's it.
They (strictly) didn't need to add it. They added it as a convenience.
1 - As the reporter puts it: "It's contradictive."
2 of 2
1
ByteArrayOutputStream.writeBytes doesn't throw the unnecessary IOException.
It's a new method specific to the byte array output stream, whereas the other options are inherited from OutputStream and are declared to throw the checked IOException (which is an unnecessary pain to handle if you know you're writing to a byte array output stream - you don't have a network connection to fail or similar)