Java.util.zip.GZIPInputStream class in Java
Last Updated :
12 Sep, 2023
This class implements a stream filter for reading compressed data in the GZIP file format.
Constructors
- GZIPInputStream(InputStream in) : Creates a new input stream with a default buffer size.
- GZIPInputStream(InputStream in, int size) : Creates a new input stream with the specified buffer size.
Methods :
- void close() : Closes this input stream and releases any system resources associated with the stream.
Syntax :public void close()
throws IOException
Specified by:
close in interface Closeable
Specified by:
close in interface AutoCloseable
Overrides:
close in class InflaterInputStream
Throws:
IOException
- int read(byte[] buf, int off, int len) : Reads uncompressed data into an array of bytes. If len is not zero, the method will block until some input can be decompressed; otherwise, no bytes are read and 0 is returned.
Syntax :public int read(byte[] buf,
int off,
int len)
throws IOException
Overrides:
read in class InflaterInputStream
Parameters:
buf - the buffer into which the data is read
off - the start offset in the destination array b
len - the maximum number of bytes read
Returns:
the actual number of bytes read, or -1 if the end of the
compressed input stream is reached
Throws:
NullPointerException
IndexOutOfBoundsException
ZipException
IOException
Methods inherited from class java.util.zip.InflaterInputStream
available, fill, mark, markSupported, read, reset, skip
Methods inherited from class java.io.FilterInputStream
read
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
Program :
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Arrays;
import java.util.zip.GZIPInputStream;
class GZipInputStreamDemo
{
public static void main(String[] args) throws IOException
{
FileInputStream fis = new FileInputStream( "file.txt" );
GZIPInputStream gzis = new GZIPInputStream(fis);
byte b[]= new byte [ 10 ];
gzis.skip( 1 );
if ( gzis.available()!=- 1 )
gzis.read(b);
System.out.println(Arrays.toString(b));
gzis.close();
}
}
|
Output :
[1, 2, 3, 4, 5, 6, 7, 8, 9, 0]
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