In last section, you learn about how to compress a serialized object into a file, now you learn how to decompress it from a Gzip file.

FileInputStream fin = new FileInputStream("c:\\address.gz");
GZIPInputStream gis = new GZIPInputStream(fin);
ObjectInputStream ois = new ObjectInputStream(gis);
address = (Address) ois.readObject();

GZIP example

In this example, you will decompress a compressed file “address.gz“, and print it out the value.

package com.mkyong.io;
 
import java.io.FileInputStream;
import java.io.ObjectInputStream;
import java.io.Serializable;
import java.util.zip.GZIPInputStream;
 
public class Deserializer implements Serializable{
 
   public static void main (String args[]) {
 
	   Deserializer deserializer = new Deserializer();
	   Address address = deserializer.deserialzeAddress();
	   System.out.println(address);
   }
 
   public Address deserialzeAddress(){
 
	   Address address;
 
	   try{
 
		   FileInputStream fin = new FileInputStream("c:\\address.gz");
		   GZIPInputStream gis = new GZIPInputStream(fin);
		   ObjectInputStream ois = new ObjectInputStream(gis);
		   address = (Address) ois.readObject();
		   ois.close();
 
		   return address;
 
	   }catch(Exception ex){
		   ex.printStackTrace();
		   return null;
	   } 
   } 
}

Output

 Street : wall street Country : united state
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