java.util.zip.InflaterOutputStream.write() Method Example

Description

The java.util.zip.InflaterOutputStream.write(byte[] b, int off, int len) method writes an array of bytes to the compressed output stream.

Declaration

Following is the declaration for java.util.zip.InflaterOutputStream.write(byte[] b, int off, int len) method.

public void write(byte[] b, int off, int len)
 throws IOException

Parameters

• b − the data to be written.

• off − the start offset of the data.

• len − the length of the data.

Exceptions

• IndexOutOfBoundsException − if off < 0, or if len < 0, or if len > b.length - off.

• IOException − if an I/O error occurs or this stream is already closed.

• NullPointerException − if b is null.

• ZipException − if a compression (ZIP) format error occurs.

Example

The following example shows the usage of java.util.zip.InflaterOutputStream.write(byte[] b, int off, int len) method.

package com.tutorialspoint;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.Arrays;
import java.util.zip.DataFormatException;
import java.util.zip.DeflaterOutputStream;
import java.util.zip.InflaterOutputStream;

public class InflaterOutputStreamDemo {

   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();
      DeflaterOutputStream outputStream = new DeflaterOutputStream(arrayOutputStream);
      outputStream.write(input);
      outputStream.close();

      //Read and decompress the data
      InflaterOutputStream inflaterOutputStream = null;
      ByteArrayOutputStream decompressedOutputStream = null;
      decompressedOutputStream = new ByteArrayOutputStream();
      inflaterOutputStream = new InflaterOutputStream(decompressedOutputStream);
      byte[] output = arrayOutputStream.toByteArray();
      inflaterOutputStream.write(output,0,output.length);
      inflaterOutputStream.flush();
      inflaterOutputStream.close();

      //Should hold the original (reconstructed) data
      byte[] result = Arrays.copyOf(decompressedOutputStream.toByteArray(), 300);

      // 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 : 300