CheckedOutputStream

CheckedOutputStream

java.util.zip

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Java 1.1

closeable flushable

This class is a subclass of java.io.FilterOutputStream that allows data to be written to a stream and a checksum computed on that data at the same time. To create a CheckedOutputStream , you must specify both the output stream to write its data to and a Checksum object, such as an instance of Adler32 , that implements the particular checksum algorithm you desire . The write( ) methods are similar to those of other OutputStream classes. The getChecksum( ) method returns the Checksum object. You must call getValue( ) on this object in order to obtain the actual checksum value.

Figure 16-136. java.util.zip.CheckedOutputStream

 public class  CheckedOutputStream  extends java.io.FilterOutputStream {  // Public Constructors  public  CheckedOutputStream  (java.io.OutputStream  out  , Checksum  cksum  );  // Public Instance Methods  public Checksum  getChecksum  ( );  // Public Methods Overriding FilterOutputStream  public void  write  (int  b  ) throws java.io.IOException;        public void  write  (byte[ ]  b  , int  off  , int  len  ) throws java.io.IOException;   }