CheckedOutputStream (Java SE 9 & JDK 9 )

java.lang.Object
- java.io.OutputStream
- - java.io.FilterOutputStream
  - - java.util.zip.CheckedOutputStream

All Implemented Interfaces:

Closeable, Flushable, AutoCloseable
```
public class CheckedOutputStream
extends FilterOutputStream
```
An output stream that also maintains a checksum of the data being written. The checksum can then be used to verify the integrity of the output data.

Since:

1.1

See Also:

Checksum

Field Summary
- Fields inherited from class java.io.FilterOutputStream
  out

Constructor Summary

Constructors
Constructor Description

CheckedOutputStream(OutputStream out, Checksum cksum)
Creates an output stream with the specified Checksum.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`Checksum`	`getChecksum()`	Returns the Checksum for this output stream.
`void`	`write(byte[] b, int off, int len)`	Writes an array of bytes.
`void`	`write(int b)`	Writes a byte.

Methods inherited from class java.io.FilterOutputStream
close, flush, write

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - CheckedOutputStream
```
public CheckedOutputStream(OutputStream out,
                           Checksum cksum)
```
    Creates an output stream with the specified Checksum.
    
    Parameters:
    
    out - the output stream
    
    cksum - the checksum
- Method Detail
  - write
```
public void write(int b)
           throws IOException
```
    Writes a byte. Will block until the byte is actually written.
    
    Overrides:
    
    write in class FilterOutputStream
    
    Parameters:
    
    b - the byte to be written
    
    Throws:
    
    IOException - if an I/O error has occurred
  - write
```
public void write(byte[] b,
                  int off,
                  int len)
           throws IOException
```
    Writes an array of bytes. Will block until the bytes are actually written.
    
    Overrides:
    
    write in class FilterOutputStream
    
    Parameters:
    
    b - the data to be written
    
    off - the start offset of the data
    
    len - the number of bytes to be written
    
    Throws:
    
    IOException - if an I/O error has occurred
    
    See Also:
    
    FilterOutputStream.write(int)
  - getChecksum
```
public Checksum getChecksum()
```
    Returns the Checksum for this output stream.
    
    Returns:
    
    the Checksum