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Java(TM) 2 Platform, Standard Edition, v1.2.2 API Specification: Class Manifest - JDK 5 Documentation v1.2.2, Java 2 SDK 英文文档

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java.util.jar
Class Manifest

java.lang.Object
  |
  +--java.util.jar.Manifest

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public class Manifest

extends Object

implements Cloneable

The Manifest class is used to maintain Manifest entry names and their associated Attributes. There are main Manifest Attributes as well as per-entry Attributes. Documentation on the Manifest format can be found at :

 http://java.sun.com/products/jdk/1.2/docs/guide/jar/manifest.html
 

Since:

JDK1.2

See Also:

Attributes

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Constructor Summary

Manifest()           Constructs a new, empty Manifest.

Manifest(InputStream is)           Constructs a new Manifest from the specified input stream.

Manifest(Manifest man)           Constructs a new Manifest that is a copy of the specified Manifest.

 

Method Summary
void	clear()           Clears the main Attributes as well as the entries in this Manifest.
Object	clone()           Returns a shallow copy of this Manifest, implemented as follows:
boolean	equals(Object o)           Returns true if the specified Object is also a Manifest and has the same main Attributes and entries.
Attributes	getAttributes(String name)           Returns the Attributes for the specified entry name.
Map	getEntries()           Returns a Map of the entries contained in this Manifest.
Attributes	getMainAttributes()           Returns the main Attributes for the Manifest.
int	hashCode()           Returns the hash code for this Manifest.
void	read(InputStream is)           Reads the Manifest from the specified InputStream.
void	write(OutputStream out)           Writes the Manifest to the specified OutputStream.

 

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, toString, wait, wait, wait

 

Constructor Detail

Manifest

public Manifest()

Constructs a new, empty Manifest.

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Manifest

public Manifest(InputStream is)
         throws IOException

Constructs a new Manifest from the specified input stream.

Parameters:

is - the input stream containing manifest data

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Manifest

public Manifest(Manifest man)

Constructs a new Manifest that is a copy of the specified Manifest.

Parameters:

man - the Manifest to copy

Method Detail

getMainAttributes

public Attributes getMainAttributes()

Returns the main Attributes for the Manifest.

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getEntries

public Map getEntries()

Returns a Map of the entries contained in this Manifest. Each entry is represented by a String name (key) and associated Attributes (value).

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getAttributes

public Attributes getAttributes(String name)

Returns the Attributes for the specified entry name. This method is defined as:

	    return (Attributes)getEntries().get(name)
 

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clear

public void clear()

Clears the main Attributes as well as the entries in this Manifest.

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write

public void write(OutputStream out)
           throws IOException

Writes the Manifest to the specified OutputStream.

Parameters:

out - the output stream

Throws:

IOException - if an I/O error has occurred

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read

public void read(InputStream is)
          throws IOException

Reads the Manifest from the specified InputStream. The entry names and attributes read will be merged in with the current manifest entries.

Parameters:

is - the input stream

Throws:

IOException - if an I/O error has occurred

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equals

public boolean equals(Object o)

Returns true if the specified Object is also a Manifest and has the same main Attributes and entries.

Overrides:

equals in class Object

Parameters:

o - the object to be compared

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hashCode

public int hashCode()

Returns the hash code for this Manifest.

Overrides:

hashCode in class Object

Tags copied from class: Object

Returns:

a hash code value for this object.

See Also:

Object.equals(java.lang.Object), Hashtable

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clone

public Object clone()

Returns a shallow copy of this Manifest, implemented as follows:

     public Object clone() { return new Manifest(this); }
 

Overrides:

clone in class Object

Tags copied from class: Object

Returns:

a clone of this instance.

Throws:

CloneNotSupportedException - if the object's class does not support the Cloneable interface. Subclasses that override the clone method can also throw this exception to indicate that an instance cannot be cloned.

OutOfMemoryError - if there is not enough memory.

See Also:

Cloneable

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