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Added in API level 1

Attributes

public class Attributes
extends Object implements Map<Object, Object>, Cloneable

java.lang.Object
↳	java.util.jar.Attributes

The Attributes class maps Manifest attribute names to associated string values. Valid attribute names are case-insensitive, are restricted to the ASCII characters in the set [0-9a-zA-Z_-], and cannot exceed 70 characters in length. Attribute values can contain any characters and will be UTF8-encoded when written to the output stream. See the JAR File Specification for more information about valid attribute names and values.

See also:

Manifest

Summary

Nested classes
`class`	`Attributes.Name` The Attributes.Name class represents an attribute name stored in this Map.

Fields
`protected Map<Object, Object>`	`map` The attribute name-value mappings.

Public constructors
`Attributes()` Constructs a new, empty Attributes object with default size.
`Attributes(int size)` Constructs a new, empty Attributes object with the specified initial size.
`Attributes(Attributes attr)` Constructs a new Attributes object with the same attribute name-value mappings as in the specified Attributes.

Public methods
`void`	`clear()` Removes all attributes from this Map.
`Object`	`clone()` Returns a copy of the Attributes, implemented as follows: public Object clone() { return new Attributes(this); } Since the attribute names and values are themselves immutable, the Attributes returned can be safely modified without affecting the original.
`boolean`	`containsKey(Object name)` Returns true if this Map contains the specified attribute name (key).
`boolean`	`containsValue(Object value)` Returns true if this Map maps one or more attribute names (keys) to the specified value.
`Set<Entry<Object, Object>>`	`entrySet()` Returns a Collection view of the attribute name-value mappings contained in this Map.
`boolean`	`equals(Object o)` Compares the specified Attributes object with this Map for equality.
`Object`	`get(Object name)` Returns the value of the specified attribute name, or null if the attribute name was not found.
`String`	`getValue(String name)` Returns the value of the specified attribute name, specified as a string, or null if the attribute was not found.
`String`	`getValue(Attributes.Name name)` Returns the value of the specified Attributes.Name, or null if the attribute was not found.
`int`	`hashCode()` Returns the hash code value for this Map.
`boolean`	`isEmpty()` Returns true if this Map contains no attributes.
`Set<Object>`	`keySet()` Returns a Set view of the attribute names (keys) contained in this Map.
`Object`	`put(Object name, Object value)` Associates the specified value with the specified attribute name (key) in this Map.
`void`	`putAll(Map<?, ?> attr)` Copies all of the attribute name-value mappings from the specified Attributes to this Map.
`String`	`putValue(String name, String value)` Associates the specified value with the specified attribute name, specified as a String.
`Object`	`remove(Object name)` Removes the attribute with the specified name (key) from this Map.
`int`	`size()` Returns the number of attributes in this Map.
`Collection<Object>`	`values()` Returns a Collection view of the attribute values contained in this Map.

Inherited methods

From class


  
    java.lang.Object

`Object`	`clone()` Creates and returns a copy of this object.
`boolean`	`equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void`	`finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>`	`getClass()` Returns the runtime class of this `Object`.
`int`	`hashCode()` Returns a hash code value for the object.
`final void`	`notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void`	`notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String`	`toString()` Returns a string representation of the object.
`final void`	`wait(long millis, int nanos)` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.
`final void`	`wait(long millis)` Causes the current thread to wait until either another thread invokes the `notify()` method or the `notifyAll()` method for this object, or a specified amount of time has elapsed.
`final void`	`wait()` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object.

From interface


  
    java.util.Map

`abstract void`	`clear()` Removes all of the mappings from this map (optional operation).
`default Object`	`compute(Object key, BiFunction<? super K, ? super V, ? extends V> remappingFunction)` Attempts to compute a mapping for the specified key and its current mapped value (or `null` if there is no current mapping).
`default Object`	`computeIfAbsent(Object key, Function<? super K, ? extends V> mappingFunction)` If the specified key is not already associated with a value (or is mapped to `null`), attempts to compute its value using the given mapping function and enters it into this map unless `null`.
`default Object`	`computeIfPresent(Object key, BiFunction<? super K, ? super V, ? extends V> remappingFunction)` If the value for the specified key is present and non-null, attempts to compute a new mapping given the key and its current mapped value.
`abstract boolean`	`containsKey(Object key)` Returns `true` if this map contains a mapping for the specified key.
`abstract boolean`	`containsValue(Object value)` Returns `true` if this map maps one or more keys to the specified value.
`abstract Set<Entry<Object, Object>>`	`entrySet()` Returns a `Set` view of the mappings contained in this map.
`abstract boolean`	`equals(Object o)` Compares the specified object with this map for equality.
`default void`	`forEach(BiConsumer<? super K, ? super V> action)` Performs the given action for each entry in this map until all entries have been processed or the action throws an exception.
`abstract Object`	`get(Object key)` Returns the value to which the specified key is mapped, or `null` if this map contains no mapping for the key.
`default Object`	`getOrDefault(Object key, Object defaultValue)` Returns the value to which the specified key is mapped, or `defaultValue` if this map contains no mapping for the key.
`abstract int`	`hashCode()` Returns the hash code value for this map.
`abstract boolean`	`isEmpty()` Returns `true` if this map contains no key-value mappings.
`abstract Set<Object>`	`keySet()` Returns a `Set` view of the keys contained in this map.
`default Object`	`merge(Object key, Object value, BiFunction<? super V, ? super V, ? extends V> remappingFunction)` If the specified key is not already associated with a value or is associated with null, associates it with the given non-null value.
`abstract Object`	`put(Object key, Object value)` Associates the specified value with the specified key in this map (optional operation).
`abstract void`	`putAll(Map<? extends K, ? extends V> m)` Copies all of the mappings from the specified map to this map (optional operation).
`default Object`	`putIfAbsent(Object key, Object value)` If the specified key is not already associated with a value (or is mapped to `null`) associates it with the given value and returns `null`, else returns the current value.
`default boolean`	`remove(Object key, Object value)` Removes the entry for the specified key only if it is currently mapped to the specified value.
`abstract Object`	`remove(Object key)` Removes the mapping for a key from this map if it is present (optional operation).
`default boolean`	`replace(Object key, Object oldValue, Object newValue)` Replaces the entry for the specified key only if currently mapped to the specified value.
`default Object`	`replace(Object key, Object value)` Replaces the entry for the specified key only if it is currently mapped to some value.
`default void`	`replaceAll(BiFunction<? super K, ? super V, ? extends V> function)` Replaces each entry's value with the result of invoking the given function on that entry until all entries have been processed or the function throws an exception.
`abstract int`	`size()` Returns the number of key-value mappings in this map.
`abstract Collection<Object>`	`values()` Returns a `Collection` view of the values contained in this map.

Fields

map

Added in API level 1

Map<Object, Object> map

The attribute name-value mappings.

Public constructors

Attributes

Added in API level 1

Attributes ()

Constructs a new, empty Attributes object with default size.

Attributes

Added in API level 1

Attributes (int size)

Constructs a new, empty Attributes object with the specified initial size.

Parameters
`size`	`int`: the initial number of attributes

Attributes

Added in API level 1

Attributes (Attributes attr)

Constructs a new Attributes object with the same attribute name-value mappings as in the specified Attributes.

Parameters
`attr`	`Attributes`: the specified Attributes

Public methods

clear

Added in API level 1

void clear ()

Removes all attributes from this Map.

clone

Added in API level 1

Object clone ()

Returns a copy of the Attributes, implemented as follows:

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

Since the attribute names and values are themselves immutable, the Attributes returned can be safely modified without affecting the original.

Returns
`Object`	a clone of this instance.

containsKey

Added in API level 1

boolean containsKey (Object name)

Returns true if this Map contains the specified attribute name (key).

Parameters
`name`	`Object`: the attribute name

Returns
`boolean`	true if this Map contains the specified attribute name

containsValue

Added in API level 1

boolean containsValue (Object value)

Returns true if this Map maps one or more attribute names (keys) to the specified value.

Parameters
`value`	`Object`: the attribute value

Returns
`boolean`	true if this Map maps one or more attribute names to the specified value

entrySet

Added in API level 1

Set<Entry<Object, Object>> entrySet ()

Returns a Collection view of the attribute name-value mappings contained in this Map.

Returns
`Set<Entry<Object, Object>>`	a set view of the mappings contained in this map

equals

Added in API level 1

boolean equals (Object o)

Compares the specified Attributes object with this Map for equality. Returns true if the given object is also an instance of Attributes and the two Attributes objects represent the same mappings.

Parameters
`o`	`Object`: the Object to be compared

Returns
`boolean`	true if the specified Object is equal to this Map

get

Added in API level 1

Object get (Object name)

Returns the value of the specified attribute name, or null if the attribute name was not found.

Parameters
`name`	`Object`: the attribute name

Returns
`Object`	the value of the specified attribute name, or null if not found.

getValue

Added in API level 1

String getValue (String name)

Returns the value of the specified attribute name, specified as a string, or null if the attribute was not found. The attribute name is case-insensitive.

This method is defined as:

      return (String)get(new Attributes.Name((String)name));

Parameters
`name`	`String`: the attribute name as a string

Returns
`String`	the String value of the specified attribute name, or null if not found.

Throws
`IllegalArgumentException`	if the attribute name is invalid

getValue

Added in API level 1

String getValue (Attributes.Name name)

Returns the value of the specified Attributes.Name, or null if the attribute was not found.

This method is defined as:

     return (String)get(name);

Parameters
`name`	`Attributes.Name`: the Attributes.Name object

Returns
`String`	the String value of the specified Attribute.Name, or null if not found.

hashCode

Added in API level 1

int hashCode ()

Returns the hash code value for this Map.

Returns
`int`	a hash code value for this object.

isEmpty

Added in API level 1

boolean isEmpty ()

Returns true if this Map contains no attributes.

Returns
`boolean`	`true` if this map contains no key-value mappings

keySet

Added in API level 1

Set<Object> keySet ()

Returns a Set view of the attribute names (keys) contained in this Map.

Returns
`Set<Object>`	a set view of the keys contained in this map

put

Added in API level 1

Object put (Object name, 
                Object value)

Associates the specified value with the specified attribute name (key) in this Map. If the Map previously contained a mapping for the attribute name, the old value is replaced.

Parameters
`name`	`Object`: the attribute name
`value`	`Object`: the attribute value

Returns
`Object`	the previous value of the attribute, or null if none

Throws
`ClassCastException`	if the name is not a Attributes.Name or the value is not a String

putAll

Added in API level 1

void putAll (Map<?, ?> attr)

Copies all of the attribute name-value mappings from the specified Attributes to this Map. Duplicate mappings will be replaced.

Parameters
`attr`	`Map`: the Attributes to be stored in this map

Throws
`ClassCastException`	if attr is not an Attributes

putValue

Added in API level 1

String putValue (String name, 
                String value)

Associates the specified value with the specified attribute name, specified as a String. The attributes name is case-insensitive. If the Map previously contained a mapping for the attribute name, the old value is replaced.

This method is defined as:

      return (String)put(new Attributes.Name(name), value);

Parameters
`name`	`String`: the attribute name as a string
`value`	`String`: the attribute value

Returns
`String`	the previous value of the attribute, or null if none

Throws
`IllegalArgumentException`	if the attribute name is invalid

remove

Added in API level 1

Object remove (Object name)

Removes the attribute with the specified name (key) from this Map. Returns the previous attribute value, or null if none.

Parameters
`name`	`Object`: attribute name

Returns
`Object`	the previous value of the attribute, or null if none

size

Added in API level 1

int size ()

Returns the number of attributes in this Map.

Returns
`int`	the number of key-value mappings in this map

values

Added in API level 1

Collection<Object> values ()

Returns a Collection view of the attribute values contained in this Map.

Returns
`Collection<Object>`	a collection view of the values contained in this map

Interfaces

Classes

Exceptions

Most visited

Recently visited

Results for

Attributes

Summary

Nested classes

Fields

Public constructors

Public methods

Inherited methods

Fields

map

Public constructors

Attributes

Attributes

Attributes

Public methods

clear

clone

containsKey

containsValue

entrySet

equals

get

getValue

getValue

hashCode

isEmpty

keySet

put

putAll

putValue

remove

size

values