- 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.Deflater.setLevel() Method Example
Description
The java.util.zip.Deflater.setLevel(int level) method sets the current compression level to the specified value.
Declaration
Following is the declaration for java.util.zip.Deflater.setLevel(int level) method.
public void setLevel(int level)
Parameters
level − the new compression level (0-9).
Exceptions
IllegalArgumentException − if the compression level is invalid.
Example
The following example shows the usage of java.util.zip.Deflater.setLevel(int level) method.
package com.tutorialspoint; import java.io.UnsupportedEncodingException; import java.util.zip.DataFormatException; import java.util.zip.Deflater; import java.util.zip.Inflater; public class DeflaterDemo { public static void main(String[] args) throws DataFormatException, UnsupportedEncodingException { 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 byte[] output = new byte[1024]; Deflater deflater = new Deflater(); deflater.setLevel(Deflater.DEFAULT_COMPRESSION); deflater.setInput(input); deflater.finish(); int compressedDataLength = deflater.deflate(output,0 , output.length, Deflater.NO_FLUSH); System.out.println("Total uncompressed bytes output :" + deflater.getTotalOut()); System.out.println("Compressed Message Checksum :" + deflater.getAdler()); deflater.finished(); System.out.println("Compressed Message length : " + compressedDataLength); // Decompress the bytes Inflater inflater = new Inflater(); inflater.setInput(output, 0, compressedDataLength); byte[] result = new byte[1024]; int resultLength = inflater.inflate(result); inflater.finished(); // Decode the bytes into a String message = new String(result, 0, resultLength, "UTF-8"); System.out.println("UnCompressed Message Checksum :" + inflater.getAdler()); 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 Total uncompressed bytes output :42 Compressed Message Checksum :368538129 Compressed Message length : 42 UnCompressed Message Checksum :368538129 UnCompressed Message length : 300Print
javazip_deflater.htm
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