![ByteArrayInputStream class
• Data stored in memory is handled by
ByteArrayInputStream
• This class is used to read bytes from a memory
• Objects of this class are used to create input stream
with memory buffers as data source
• Constructors
• ByteArrayInputStream(byte array[ ])
• ByteArrayInputStream(byte array[ ], int start, int
numBytes)
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Byte arrayinputstream.50
- 1. ByteArrayInputStream class http://improvejava.blogspot.in/ 1
- 2. Objectives On completion of this period, you would be able to learn • Other I/O stream classes • ByteArrayInputStream • ByteArrayOutputStream • BufferedInputStream • BufferedOutputStream http://improvejava.blogspot.in/ 2
- 3. Recap In the last class, you have studied about the types Stream Class • Byte Streams are two types 1. InputStream class 2. OutputStream class • FileInputStream and FileOutputStream are the subclasses of byte stream • Let us explore some more stream classes http://improvejava.blogspot.in/ 3
- 4. ByteArrayInputStream class • Data stored in memory is handled by ByteArrayInputStream • This class is used to read bytes from a memory • Objects of this class are used to create input stream with memory buffers as data source • Constructors • ByteArrayInputStream(byte array[ ]) • ByteArrayInputStream(byte array[ ], int start, int numBytes) http://improvejava.blogspot.in/ 4
- 5. ByteArrayOutputStream class • Data stored in memory is handled by ByteArrayOutputStream • This class is used to write bytes into memory • Objects of this class are used to create output stream with memory buffers as data sink • Constructors • ByteArrayOutputStream( ) • ByteArrayOutputStream(int numBytes) • In the first form, a buffer of 32 bytes is created. • In the second, a buffer is created with a size equal to that specified by numBytes http://improvejava.blogspot.in/ 5
- 6. Filtered Byte Stream class • Byte streams access the data in byte form • Raw bytes can not be used for any useful purpose • For converting bytes to useful forms such as char, string, int, etc filtered streams are used • Streams that can take other stream as arguments are called filtered streams • FilterInputStream • BufferedInputStream is a subclass of it • FilterOutputStream • BufferedOutputStream is a subclass of it In many practical situations only filtered streams are useful http://improvejava.blogspot.in/ 6
- 7. BufferedInputStream class • This is a subclass of FilterInpuStream • This class is used to increase the efficiency of reading bytes from an input stream • Fetching a byte and sending it to the destination one after the another is a time consuming process • Instead, bytes can be read and stored in buffer memory before sending it to the destination • Once the buffer is full, the bytes can be sent to the destination http://improvejava.blogspot.in/ 7
- 8. BufferedOutputStream class • This class is a subclass of FilterOutputStream • This class is used to send buffered bytes to an underlying output stream in an efficient way Constructors • BufferedOutputStream(OutputStream outputStream) • BufferedOutputStream(OutputStream outputStream, int bufSize) • The first form creates a buffered stream using a buffer of 512 bytes. In the second form, • the size of the buffer is passed in bufSize. http://improvejava.blogspot.in/ 8
- 9. Summary • Data stored in memory is handled by ByteArrayInputStream and is used to read bytes from a memory • ByteArrayOutputStream is used to write bytes into memory • FilteredStreams are used for converting bytes to useful forms such as char, string, int, etc http://improvejava.blogspot.in/ 9
- 10. Quiz 1. ---- is used to read bytes from a memory A. ByteArrayOutputStream B. ByteArrayInputStream C. Reader D. None http://improvejava.blogspot.in/ 10
- 11. Quiz 2. --- is used to write bytes into memory A. ByteArrayInputStream B. ByteArrayOutputStream C. Writer D. None http://improvejava.blogspot.in/ 11
- 12. Frequently Asked Questions 1. Write about ByteArrayInput and ByteArrayOutput streams 2. Write about FilteredByte Streams http://improvejava.blogspot.in/ 12