ZipInputStream (Java Platform SE 7 )

java.lang.Object
- java.io.InputStream
- - java.io.FilterInputStream
  - - java.util.zip.InflaterInputStream
    - - java.util.zip.ZipInputStream

All Implemented Interfaces:

Closeable, AutoCloseable

Direct Known Subclasses:

JarInputStream
```
public class ZipInputStream
extends InflaterInputStream
```
This class implements an input stream filter for reading files in the ZIP file format. Includes support for both compressed and uncompressed entries.

Field Summary

Fields
Modifier and Type	Field and Description
`static int`	`CENATT`
`static int`	`CENATX`
`static int`	`CENCOM`
`static int`	`CENCRC`
`static int`	`CENDSK`
`static int`	`CENEXT`
`static int`	`CENFLG`
`static int`	`CENHDR`
`static int`	`CENHOW`
`static int`	`CENLEN`
`static int`	`CENNAM`
`static int`	`CENOFF`
`static long`	`CENSIG`
`static int`	`CENSIZ`
`static int`	`CENTIM`
`static int`	`CENVEM`
`static int`	`CENVER`
`static int`	`ENDCOM`
`static int`	`ENDHDR`
`static int`	`ENDOFF`
`static long`	`ENDSIG`
`static int`	`ENDSIZ`
`static int`	`ENDSUB`
`static int`	`ENDTOT`
`static int`	`EXTCRC`
`static int`	`EXTHDR`
`static int`	`EXTLEN`
`static long`	`EXTSIG`
`static int`	`EXTSIZ`
`static int`	`LOCCRC`
`static int`	`LOCEXT`
`static int`	`LOCFLG`
`static int`	`LOCHDR`
`static int`	`LOCHOW`
`static int`	`LOCLEN`
`static int`	`LOCNAM`
`static long`	`LOCSIG`
`static int`	`LOCSIZ`
`static int`	`LOCTIM`
`static int`	`LOCVER`

Fields inherited from class java.util.zip.InflaterInputStream
buf, inf, len

Fields inherited from class java.io.FilterInputStream
in

Constructor Summary

Constructors
Constructor and Description
`ZipInputStream(InputStream in)` Creates a new ZIP input stream.
`ZipInputStream(InputStream in, Charset charset)` Creates a new ZIP input stream.

Method Summary

Methods
Modifier and Type	Method and Description
`int`	`available()` Returns 0 after EOF has reached for the current entry data, otherwise always return 1.
`void`	`close()` Closes this input stream and releases any system resources associated with the stream.
`void`	`closeEntry()` Closes the current ZIP entry and positions the stream for reading the next entry.
`protected ZipEntry`	`createZipEntry(String name)` Creates a new `ZipEntry` object for the specified entry name.
`ZipEntry`	`getNextEntry()` Reads the next ZIP file entry and positions the stream at the beginning of the entry data.
`int`	`read(byte[] b, int off, int len)` Reads from the current ZIP entry into an array of bytes.
`long`	`skip(long n)` Skips specified number of bytes in the current ZIP entry.

Methods inherited from class java.util.zip.InflaterInputStream
fill, mark, markSupported, read, reset

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

- Field Detail
  - LOCSIG
```
public static final long LOCSIG
```
    See Also:
    Constant Field Values
  - EXTSIG
```
public static final long EXTSIG
```
    See Also:
    Constant Field Values
  - CENSIG
```
public static final long CENSIG
```
    See Also:
    Constant Field Values
  - ENDSIG
```
public static final long ENDSIG
```
    See Also:
    Constant Field Values
  - LOCHDR
```
public static final int LOCHDR
```
    See Also:
    Constant Field Values
  - EXTHDR
```
public static final int EXTHDR
```
    See Also:
    Constant Field Values
  - CENHDR
```
public static final int CENHDR
```
    See Also:
    Constant Field Values
  - ENDHDR
```
public static final int ENDHDR
```
    See Also:
    Constant Field Values
  - LOCVER
```
public static final int LOCVER
```
    See Also:
    Constant Field Values
  - LOCFLG
```
public static final int LOCFLG
```
    See Also:
    Constant Field Values
  - LOCHOW
```
public static final int LOCHOW
```
    See Also:
    Constant Field Values
  - LOCTIM
```
public static final int LOCTIM
```
    See Also:
    Constant Field Values
  - LOCCRC
```
public static final int LOCCRC
```
    See Also:
    Constant Field Values
  - LOCSIZ
```
public static final int LOCSIZ
```
    See Also:
    Constant Field Values
  - LOCLEN
```
public static final int LOCLEN
```
    See Also:
    Constant Field Values
  - LOCNAM
```
public static final int LOCNAM
```
    See Also:
    Constant Field Values
  - LOCEXT
```
public static final int LOCEXT
```
    See Also:
    Constant Field Values
  - EXTCRC
```
public static final int EXTCRC
```
    See Also:
    Constant Field Values
  - EXTSIZ
```
public static final int EXTSIZ
```
    See Also:
    Constant Field Values
  - EXTLEN
```
public static final int EXTLEN
```
    See Also:
    Constant Field Values
  - CENVEM
```
public static final int CENVEM
```
    See Also:
    Constant Field Values
  - CENVER
```
public static final int CENVER
```
    See Also:
    Constant Field Values
  - CENFLG
```
public static final int CENFLG
```
    See Also:
    Constant Field Values
  - CENHOW
```
public static final int CENHOW
```
    See Also:
    Constant Field Values
  - CENTIM
```
public static final int CENTIM
```
    See Also:
    Constant Field Values
  - CENCRC
```
public static final int CENCRC
```
    See Also:
    Constant Field Values
  - CENSIZ
```
public static final int CENSIZ
```
    See Also:
    Constant Field Values
  - CENLEN
```
public static final int CENLEN
```
    See Also:
    Constant Field Values
  - CENNAM
```
public static final int CENNAM
```
    See Also:
    Constant Field Values
  - CENEXT
```
public static final int CENEXT
```
    See Also:
    Constant Field Values
  - CENCOM
```
public static final int CENCOM
```
    See Also:
    Constant Field Values
  - CENDSK
```
public static final int CENDSK
```
    See Also:
    Constant Field Values
  - CENATT
```
public static final int CENATT
```
    See Also:
    Constant Field Values
  - CENATX
```
public static final int CENATX
```
    See Also:
    Constant Field Values
  - CENOFF
```
public static final int CENOFF
```
    See Also:
    Constant Field Values
  - ENDSUB
```
public static final int ENDSUB
```
    See Also:
    Constant Field Values
  - ENDTOT
```
public static final int ENDTOT
```
    See Also:
    Constant Field Values
  - ENDSIZ
```
public static final int ENDSIZ
```
    See Also:
    Constant Field Values
  - ENDOFF
```
public static final int ENDOFF
```
    See Also:
    Constant Field Values
  - ENDCOM
```
public static final int ENDCOM
```
    See Also:
    Constant Field Values
- Constructor Detail
  - ZipInputStream
```
public ZipInputStream(InputStream in)
```
    Creates a new ZIP input stream.
    The UTF-8 charset is used to decode the entry names.
    
    Parameters:
    in - the actual input stream
  - ZipInputStream
```
public ZipInputStream(InputStream in,
              Charset charset)
```
    Creates a new ZIP input stream.
    
    Parameters:
    in - the actual input stream
    charset - The charset to be used to decode the ZIP entry name (ignored if the language encoding bit of the ZIP entry's general purpose bit flag is set).
    Since:
    
    1.7
- Method Detail
  - getNextEntry
```
public ZipEntry getNextEntry()
                      throws IOException
```
    Reads the next ZIP file entry and positions the stream at the beginning of the entry data.
    
    Returns:
    the next ZIP file entry, or null if there are no more entries
    
    Throws:
    
    ZipException - if a ZIP file error has occurred
    
    IOException - if an I/O error has occurred
  - closeEntry
```
public void closeEntry()
                throws IOException
```
    Closes the current ZIP entry and positions the stream for reading the next entry.
    
    Throws:
    
    ZipException - if a ZIP file error has occurred
    
    IOException - if an I/O error has occurred
  - available
```
public int available()
              throws IOException
```
    Returns 0 after EOF has reached for the current entry data, otherwise always return 1.
    Programs should not count on this method to return the actual number of bytes that could be read without blocking.
    
    Overrides:
    
    available in class InflaterInputStream
    
    Returns:
    1 before EOF and 0 after EOF has reached for current entry.
    
    Throws:
    
    IOException - if an I/O error occurs.
  - read
```
public int read(byte[] b,
       int off,
       int len)
         throws IOException
```
    Reads from the current ZIP entry into an array of bytes. If len is not zero, the method blocks until some input is available; otherwise, no bytes are read and 0 is returned.
    
    Overrides:
    
    read in class InflaterInputStream
    
    Parameters:
    b - 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 entry is reached
    
    Throws:
    
    NullPointerException - if b is null.
    
    IndexOutOfBoundsException - if off is negative, len is negative, or len is greater than b.length - off
    
    ZipException - if a ZIP file error has occurred
    
    IOException - if an I/O error has occurred
    See Also:
    FilterInputStream.in
  - skip
```
public long skip(long n)
          throws IOException
```
    Skips specified number of bytes in the current ZIP entry.
    
    Overrides:
    
    skip in class InflaterInputStream
    
    Parameters:
    n - the number of bytes to skip
    
    Returns:
    the actual number of bytes skipped
    
    Throws:
    
    ZipException - if a ZIP file error has occurred
    
    IOException - if an I/O error has occurred
    
    IllegalArgumentException - if n < 0
  - close
```
public void close()
           throws IOException
```
    Closes this input stream and releases any system resources associated with the stream.
    
    Specified by:
    
    close in interface Closeable
    
    Specified by:
    
    close in interface AutoCloseable
    
    Overrides:
    
    close in class InflaterInputStream
    
    Throws:
    
    IOException - if an I/O error has occurred
    See Also:
    FilterInputStream.in
  - createZipEntry
```
protected ZipEntry createZipEntry(String name)
```
    Creates a new ZipEntry object for the specified entry name.
    
    Parameters:
    name - the ZIP file entry name
    
    Returns:
    the ZipEntry just created

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For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
Copyright © 1993, 2012, Oracle and/or its affiliates. All rights reserved.

Class ZipInputStream

Field Summary

Fields inherited from class java.util.zip.InflaterInputStream

Fields inherited from class java.io.FilterInputStream

Constructor Summary

Method Summary

Methods inherited from class java.util.zip.InflaterInputStream

Methods inherited from class java.io.FilterInputStream

Methods inherited from class java.lang.Object

Field Detail

LOCSIG

EXTSIG

CENSIG

ENDSIG

LOCHDR

EXTHDR

CENHDR

ENDHDR

LOCVER

LOCFLG

LOCHOW

LOCTIM

LOCCRC

LOCSIZ

LOCLEN

LOCNAM

LOCEXT

EXTCRC

EXTSIZ

EXTLEN

CENVEM

CENVER

CENFLG

CENHOW

CENTIM

CENCRC

CENSIZ

CENLEN

CENNAM

CENEXT

CENCOM

CENDSK

CENATT

CENATX

CENOFF

ENDSUB

ENDTOT

ENDSIZ

ENDOFF

ENDCOM

Constructor Detail

ZipInputStream

ZipInputStream

Method Detail

getNextEntry

closeEntry

available

read

skip

close

createZipEntry