// compression/GZIPcompress.java

// (c)2017 MindView LLC: see Copyright.txt

// We make no guarantees that this code is fit for any purpose.

// Visit http://OnJava8.com for more book information.

// {java GZIPcompress GZIPcompress.java}

// {VisuallyInspectOutput}

import java.util.zip.*;

import java.io.*;

public class GZIPcompress {

public static void main(String[] args) {

if(args.length == 0) {

System.out.println(

"Usage: \nGZIPcompress file\n" +

"\tUses GZIP compression to compress " +

"the file to test.gz");

System.exit(1);

}

try(

InputStream in = new BufferedInputStream(

new FileInputStream(args[0]));

BufferedOutputStream out =

new BufferedOutputStream(

new GZIPOutputStream(

new FileOutputStream("test.gz")))

) {

System.out.println("Writing file");

int c;

while((c = in.read()) != -1)

out.write(c);

} catch(IOException e) {

throw new RuntimeException(e);

}

System.out.println("Reading file");

try(

BufferedReader in2 = new BufferedReader(

new InputStreamReader(new GZIPInputStream(

new FileInputStream("test.gz"))))

) {

in2.lines().forEach(System.out::println);

} catch(IOException e) {

throw new RuntimeException(e);

}

}

}