- java.util.zip Package Classes
- java.util.zip - Home
- java.util.zip - Adler32
- java.util.zip - CheckedInputStream
- java.util.zip - CheckedOutputStream
- java.util.zip - CRC32
- java.util.zip - Deflater
- java.util.zip - DeflaterInputStream
- java.util.zip - DeflaterOutputStream
- java.util.zip - GZIPInputStream
- java.util.zip - GZIPOutputStream
- java.util.zip - Inflater
- java.util.zip - InflaterInputStream
- java.util.zip - InflaterOutputStream
- java.util.zip - ZipEntry
- java.util.zip - ZipFile
- java.util.zip - ZipInputStream
- java.util.zip - ZipOutputStream
- java.util.zip Package Extras
- java.util.zip - Exceptions
- java.util.zip - Error
- java.util.zip Useful Resources
- java.util.zip - Quick Guide
- java.util.zip - Useful Resources
- java.util.zip - Discussion
java.util.zip.GZIPOutputStream.finish() Method Example
Description
The java.util.zip.GZIPOutputStream.finish() method finishes writing compressed data to the output stream without closing the underlying stream. Use this method when applying multiple filters in succession to the same output stream.
Declaration
Following is the declaration for java.util.zip.GZIPOutputStream.finish() method.
public void finish() throws IOException
Exceptions
IOException − if an I/O error has occurred.
Example
The following example shows the usage of java.util.zip.GZIPOutputStream.finish() method.
package com.tutorialspoint; import java.io.ByteArrayInputStream; import java.io.ByteArrayOutputStream; import java.io.IOException; import java.util.Arrays; import java.util.zip.DataFormatException; import java.util.zip.GZIPInputStream; import java.util.zip.GZIPOutputStream; public class GZIPOutputStreamDemo { public static void main(String[] args) throws DataFormatException, IOException { String message = "Welcome to TutorialsPoint.com;" +"Welcome to TutorialsPoint.com;" +"Welcome to TutorialsPoint.com;" +"Welcome to TutorialsPoint.com;" +"Welcome to TutorialsPoint.com;" +"Welcome to TutorialsPoint.com;" +"Welcome to TutorialsPoint.com;" +"Welcome to TutorialsPoint.com;" +"Welcome to TutorialsPoint.com;" +"Welcome to TutorialsPoint.com;"; System.out.println("Original Message length : " + message.length()); byte[] input = message.getBytes("UTF-8"); // Compress the bytes ByteArrayOutputStream arrayOutputStream = new ByteArrayOutputStream(); GZIPOutputStream outputStream = new GZIPOutputStream(arrayOutputStream); outputStream.write(input); outputStream.finish(); outputStream.close(); //Read and decompress the data byte[] readBuffer = new byte[5000]; ByteArrayInputStream arrayInputStream = new ByteArrayInputStream(arrayOutputStream.toByteArray()); GZIPInputStream inputStream = new GZIPInputStream(arrayInputStream); int read = inputStream.read(readBuffer,0,readBuffer.length); inputStream.close(); //Should hold the original (reconstructed) data byte[] result = Arrays.copyOf(readBuffer, read); // Decode the bytes into a String message = new String(result, "UTF-8"); System.out.println("UnCompressed Message length : " + message.length()); } }
Let us compile and run the above program, this will produce the following result −
Original Message length : 300 UnCompressed Message length : 300Print
javazip_gzipoutputstream.htm
Advertisements