Clears this provider so that it no longer contains the properties used to look up facilities implemented by the provider.

  Clears this provider so that it no longer contains the properties used to look up facilities implemented by the provider.

First, if there is a security manager, its checkSecurityAccess method is called with the string "clearProviderProperties."+name (where name is the provider name) to see if it's ok to clear this provider. If the default implementation of checkSecurityAccess is used (that is, that method is not overriden), then this results in a call to the security manager's checkPermission method with a SecurityPermission("clearProviderProperties."+name) permission.
Throws:
- SecurityException - if a security manager exists and its {@link java.lang.SecurityManager#checkSecurityAccess} method denies access to clear this provider
Since: 1.2

  Creates a shallow copy of this hashtable.

  Creates a shallow copy of this hashtable. All the structure of the
hashtable itself is copied, but the keys and values are not cloned.
This is a relatively expensive operation.
Returns: a clone of the hashtable

  Tests if some key maps into the specified value in this hashtable.

  Tests if some key maps into the specified value in this hashtable. This operation is more expensive than the containsKey method.

Note that this method is identical in functionality to containsValue, (which is part of the Map interface in the collections framework).
Returns: true if and only if some key maps to the value argument in this hashtable as determined by the equals method; false otherwise.
Parameters:
- value - a value to search for
Throws:
- NullPointerException - if the value is null

  Tests if the specified object is a key in this hashtable.

  Tests if the specified object is a key in this hashtable.
Returns: true if and only if the specified object is a key in this hashtable, as determined by the equals method; false otherwise.
Parameters:
- key - possible key
Throws:
- NullPointerException - if the key is null
See Also: Hashtable.contains(Object),

  Returns true if this hashtable maps one or more keys to this value.

  Returns true if this hashtable maps one or more keys to this value.

Note that this method is identical in functionality to contains (which predates the Map interface).
Returns: true if this map maps one or more keys to the specified value
Parameters:
- value - value whose presence in this hashtable is to be tested
Throws:
- NullPointerException - if the value is null
Since: 1.2

  Returns an unmodifiable Set view of the property entries contained in this Provider.

  Returns an unmodifiable Set view of the property entries contained
in this Provider.
Since: 1.2
See Also: Map.Entry,

  Compares the specified Object with this Map for equality, as per the definition in the Map interface.

  Compares the specified Object with this Map for equality,
as per the definition in the Map interface.
Returns: true if the specified Object is equal to this Map
Parameters:
- o - object to be compared for equality with this hashtable
Since: 1.2
See Also: Map.equals(Object),

  Returns a human-readable description of the provider and its services.

  Returns a human-readable description of the provider and its
services. This may return an HTML page, with relevant links.
Returns: a description of the provider and its services.

  Returns the name of this provider.

  Returns the name of this provider.
Returns: the name of this provider.

  Searches for the property with the specified key in this property list.

  Searches for the property with the specified key in this property list.
If the key is not found in this property list, the default property list,
and its defaults, recursively, are then checked. The method returns the
default value argument if the property is not found.
Returns: the value in this property list with the specified key value.
Parameters:
- key - the hashtable key.
- defaultValue - a default value.
See Also: Properties.setProperty(java.lang.String, java.lang.String), Properties.defaults,

  Get the service describing this Provider's implementation of the specified type of this algorithm or alias.

  Get the service describing this Provider's implementation of the
specified type of this algorithm or alias. If no such
implementation exists, this method returns null. If there are two
matching services, one added to this provider using
putService() and one added via put(),
the service added via putService() is returned.
Returns: the service describing this Provider's matching service or null if no such service exists
Parameters:
- type - the type of {@link Service service} requested (for example, MessageDigest)
- algorithm - the case insensitive algorithm name (or alternate alias) of the service requested (for example, SHA-1)
Throws:
- NullPointerException - if type or algorithm is null
Since: 1.5

  Get an unmodifiable Set of all services supported by this Provider.

  Get an unmodifiable Set of all services supported by
this Provider.
Returns: an unmodifiable Set of all services supported by this Provider
Since: 1.5

  Returns the version number for this provider.

  Returns the version number for this provider.
Returns: the version number for this provider.

  Returns the hash code value for this Map as per the definition in the Map interface.

  Returns the hash code value for this Map as per the definition in the
Map interface.
Since: 1.2
See Also: Map.hashCode(),

  Tests if this hashtable maps no keys to values.

  Tests if this hashtable maps no keys to values.
Returns: true if this hashtable maps no keys to values; false otherwise.

  Returns an unmodifiable Set view of the property keys contained in this provider.

  Returns an unmodifiable Set view of the property keys contained in
this provider.
Since: 1.2

  Prints this property list out to the specified output stream.

  Prints this property list out to the specified output stream.
This method is useful for debugging.
Parameters:
- out - an output stream.
Throws:
- ClassCastException - if any key in this property list is not a string.

  Prints this property list out to the specified output stream.

  Prints this property list out to the specified output stream.
This method is useful for debugging.
Parameters:
- out - an output stream.
Throws:
- ClassCastException - if any key in this property list is not a string.
Since: JDK1.1

  Reads a property list (key and element pairs) from the input stream.

  Reads a property list (key and element pairs) from the input stream.
Parameters:
- inStream - the input stream.
Throws:
- IOException - if an error occurred when reading from the input stream.
See Also: Properties.load(java.io.Reader),

  Reads a property list (key and element pairs) from the input character stream in a simple line-oriented format.

  Reads a property list (key and element pairs) from the input character stream in a simple line-oriented format.

Properties are processed in terms of lines. There are two kinds of line, natural lines and logical lines. A natural line is defined as a line of characters that is terminated either by a set of line terminator characters (\n or \r or \r\n) or by the end of the stream. A natural line may be either a blank line, a comment line, or hold all or some of a key-element pair. A logical line holds all the data of a key-element pair, which may be spread out across several adjacent natural lines by escaping the line terminator sequence with a backslash character \. Note that a comment line cannot be extended in this manner; every natural line that is a comment must have its own comment indicator, as described below. Lines are read from input until the end of the stream is reached.

A natural line that contains only white space characters is considered blank and is ignored. A comment line has an ASCII '#' or '!' as its first non-white space character; comment lines are also ignored and do not encode key-element information. In addition to line terminators, this format considers the characters space (' ', '\u0020'), tab ('\t', '\u0009'), and form feed ('\f', '\u000C') to be white space.

If a logical line is spread across several natural lines, the backslash escaping the line terminator sequence, the line terminator sequence, and any white space at the start of the following line have no affect on the key or element values. The remainder of the discussion of key and element parsing (when loading) will assume all the characters constituting the key and element appear on a single natural line after line continuation characters have been removed. Note that it is not sufficient to only examine the character preceding a line terminator sequence to decide if the line terminator is escaped; there must be an odd number of contiguous backslashes for the line terminator to be escaped. Since the input is processed from left to right, a non-zero even number of 2n contiguous backslashes before a line terminator (or elsewhere) encodes n backslashes after escape processing.

The key contains all of the characters in the line starting with the first non-white space character and up to, but not including, the first unescaped '=', ':', or white space character other than a line terminator. All of these key termination characters may be included in the key by escaping them with a preceding backslash character; for example,

\:\=

would be the two-character key ":=". Line terminator characters can be included using \r and \n escape sequences. Any white space after the key is skipped; if the first non-white space character after the key is '=' or ':', then it is ignored and any white space characters after it are also skipped. All remaining characters on the line become part of the associated element string; if there are no remaining characters, the element is the empty string "". Once the raw character sequences constituting the key and element are identified, escape processing is performed as described above.

As an example, each of the following three lines specifies the key "Truth" and the associated element value "Beauty":

 Truth = Beauty
        Truth:Beauty
 Truth                  :Beauty
 

As another example, the following three lines specify a single property:

 fruits                           apple, banana, pear, \
                                  cantaloupe, watermelon, \
                                  kiwi, mango
 

The key is "fruits" and the associated element is:

"apple, banana, pear, cantaloupe, watermelon, kiwi, mango"

Note that a space appears before each \ so that a space will appear after each comma in the final result; the \, line terminator, and leading white space on the continuation line are merely discarded and are not replaced by one or more other characters.

As a third example, the line:

cheeses
 

specifies that the key is "cheeses" and the associated element is the empty string "".

Characters in keys and elements can be represented in escape sequences similar to those used for character and string literals (see §3.3 and §3.10.6 of the Java Language Specification). The differences from the character escape sequences and Unicode escapes used for characters and strings are:

• Octal escapes are not recognized.
• The character sequence \b does not represent a backspace character.
• The method does not treat a backslash character, \, before a non-valid escape character as an error; the backslash is silently dropped. For example, in a Java string the sequence "\z" would cause a compile time error. In contrast, this method silently drops the backslash. Therefore, this method treats the two character sequence "\b" as equivalent to the single character 'b'.
• Escapes are not necessary for single and double quotes; however, by the rule above, single and double quote characters preceded by a backslash still yield single and double quote characters, respectively.
• Only a single 'u' character is allowed in a Uniocde escape sequence.

The specified stream remains open after this method returns.
Parameters:
- reader - the input character stream.
Throws:
- IOException - if an error occurred when reading from the input stream.
- IllegalArgumentException - if a malformed Unicode escape appears in the input.
Since: 1.6

  Loads all of the properties represented by the XML document on the specified input stream into this properties table.

  Loads all of the properties represented by the XML document on the specified input stream into this properties table.

The XML document must have the following DOCTYPE declaration:

 <!DOCTYPE properties SYSTEM "http://java.sun.com/dtd/properties.dtd">
 

Furthermore, the document must satisfy the properties DTD described above.

The specified stream is closed after this method returns.
Parameters:
- in - the input stream from which to read the XML document.
Throws:
- IOException - if reading from the specified input stream results in an IOException.
- InvalidPropertiesFormatException - Data on input stream does not constitute a valid XML document with the mandated document type.
- NullPointerException - if in is null.
Since: 1.5
See Also: Properties.storeToXML(OutputStream, String, String),

  Returns an enumeration of all the keys in this property list, including distinct keys in the default property list if a key of the same name has not already been found from the main properties list.

  Returns an enumeration of all the keys in this property list,
including distinct keys in the default property list if a key
of the same name has not already been found from the main
properties list.
Returns: an enumeration of all the keys in this property list, including the keys in the default property list.
Throws:
- ClassCastException - if any key in this property list is not a string.
See Also: Enumeration, Properties.defaults, Properties.stringPropertyNames(),

  Maps the specified key to the specified value in this hashtable.

  Maps the specified key to the specified value in this hashtable. Neither the key nor the value can be null.

The value can be retrieved by calling the get method with a key that is equal to the original key.
Returns: the previous value of the specified key in this hashtable, or null if it did not have one
Parameters:
- key - the hashtable key
- value - the value
Throws:
- NullPointerException - if the key or value is null
See Also: Object.equals(Object), Hashtable.get(Object),

  Sets the key property to have the specified value.

  Sets the key property to have the specified value.

First, if there is a security manager, its checkSecurityAccess method is called with the string "putProviderProperty."+name, where name is the provider name, to see if it's ok to set this provider's property values. If the default implementation of checkSecurityAccess is used (that is, that method is not overriden), then this results in a call to the security manager's checkPermission method with a SecurityPermission("putProviderProperty."+name) permission.
Returns: the previous value of the specified property (key), or null if it did not have one.
Parameters:
- key - the property key.
- value - the property value.
Throws:
- SecurityException - if a security manager exists and its {@link java.lang.SecurityManager#checkSecurityAccess} method denies access to set property values.
Since: 1.2

  Copies all of the mappings from the specified Map to this provider.

  Copies all of the mappings from the specified Map to this provider.
These mappings will replace any properties that this provider had
for any of the keys currently in the specified Map.
Since: 1.2

  Copies all of the mappings from the specified map to this hashtable.

  Copies all of the mappings from the specified map to this hashtable.
These mappings will replace any mappings that this hashtable had for any
of the keys currently in the specified map.
Parameters:
- t - mappings to be stored in this map
Throws:
- NullPointerException - if the specified map is null
Since: 1.2

  Add a service.

  Add a service. If a service of the same type with the same algorithm name exists and it was added using putService(), it is replaced by the new service. This method also places information about this service in the provider's Hashtable values in the format described in the Java Cryptography Architecture API Specification & Reference .

Also, if there is a security manager, its checkSecurityAccess method is called with the string "putProviderProperty."+name, where name is the provider name, to see if it's ok to set this provider's property values. If the default implementation of checkSecurityAccess is used (that is, that method is not overriden), then this results in a call to the security manager's checkPermission method with a SecurityPermission("putProviderProperty."+name) permission.
Parameters:
- s - the Service to add
Throws:
- SecurityException - if a security manager exists and its {@link java.lang.SecurityManager#checkSecurityAccess} method denies access to set property values.
- NullPointerException - if s is null
Since: 1.5

  Increases the capacity of and internally reorganizes this hashtable, in order to accommodate and access its entries more efficiently.

  Increases the capacity of and internally reorganizes this
hashtable, in order to accommodate and access its entries more
efficiently. This method is called automatically when the
number of keys in the hashtable exceeds this hashtable's capacity
and load factor.

  Removes the key property (and its corresponding value).

  Removes the key property (and its corresponding value).

First, if there is a security manager, its checkSecurityAccess method is called with the string "removeProviderProperty."+name, where name is the provider name, to see if it's ok to remove this provider's properties. If the default implementation of checkSecurityAccess is used (that is, that method is not overriden), then this results in a call to the security manager's checkPermission method with a SecurityPermission("removeProviderProperty."+name) permission.
Returns: the value to which the key had been mapped, or null if the key did not have a mapping.
Parameters:
- key - the key for the property to be removed.
Throws:
- SecurityException - if a security manager exists and its {@link java.lang.SecurityManager#checkSecurityAccess} method denies access to remove this provider's properties.
Since: 1.2

  Remove a service previously added using putService().

  Remove a service previously added using putService(). The specified service is removed from this provider. It will no longer be returned by getService() and its information will be removed from this provider's Hashtable.

Also, if there is a security manager, its checkSecurityAccess method is called with the string "removeProviderProperty."+name, where name is the provider name, to see if it's ok to remove this provider's properties. If the default implementation of checkSecurityAccess is used (that is, that method is not overriden), then this results in a call to the security manager's checkPermission method with a SecurityPermission("removeProviderProperty."+name) permission.
Parameters:
- s - the Service to be removed
Throws:
- SecurityException - if a security manager exists and its {@link java.lang.SecurityManager#checkSecurityAccess} method denies access to remove this provider's properties.
- NullPointerException - if s is null
Since: 1.5

  Calls the store(OutputStream out, String comments) method and suppresses IOExceptions that were thrown.

  Calls the store(OutputStream out, String comments) method
and suppresses IOExceptions that were thrown.
Parameters:
- out - an output stream.
- comments - a description of the property list.
Throws:
- ClassCastException - if this Properties object contains any keys or values that are not Strings.

  Calls the Hashtable method put.

  Calls the Hashtable method put. Provided for
parallelism with the getProperty method. Enforces use of
strings for property keys and values. The value returned is the
result of the Hashtable call to put.
Returns: the previous value of the specified key in this property list, or null if it did not have one.
Parameters:
- key - the key to be placed into this property list.
- value - the value corresponding to key.
Since: 1.2
See Also: Properties.getProperty(java.lang.String),

  Returns the number of keys in this hashtable.

  Returns the number of keys in this hashtable.
Returns: the number of keys in this hashtable.

  Writes this property list (key and element pairs) in this Properties table to the output stream in a format suitable for loading into a Properties table using the load(InputStream) method.

  Writes this property list (key and element pairs) in this Properties table to the output stream in a format suitable for loading into a Properties table using the load(InputStream) method.

Properties from the defaults table of this Properties table (if any) are not written out by this method.

This method outputs the comments, properties keys and values in the same format as specified in store(Writer), with the following differences:

• The stream is written using the ISO 8859-1 character encoding.
• Characters not in Latin-1 in the comments are written as \uxxxx for their appropriate unicode hexadecimal value xxxx.
• Characters less than \u0020 and characters greater than \u007E in property keys or values are written as \uxxxx for the appropriate hexadecimal value xxxx.

After the entries have been written, the output stream is flushed. The output stream remains open after this method returns.

Parameters:
- out - an output stream.
- comments - a description of the property list.
Throws:
- IOException - if writing this property list to the specified output stream throws an IOException.
- ClassCastException - if this Properties object contains any keys or values that are not Strings.
- NullPointerException - if out is null.
Since: 1.2

  Writes this property list (key and element pairs) in this Properties table to the output character stream in a format suitable for using the load(Reader) method.

  Writes this property list (key and element pairs) in this Properties table to the output character stream in a format suitable for using the load(Reader) method.

Properties from the defaults table of this Properties table (if any) are not written out by this method.

If the comments argument is not null, then an ASCII # character, the comments string, and a line separator are first written to the output stream. Thus, the comments can serve as an identifying comment. Any one of a line feed ('\n'), a carriage return ('\r'), or a carriage return followed immediately by a line feed in comments is replaced by a line separator generated by the Writer and if the next character in comments is not character # or character ! then an ASCII # is written out after that line separator.

Next, a comment line is always written, consisting of an ASCII # character, the current date and time (as if produced by the toString method of Date for the current time), and a line separator as generated by the Writer.

Then every entry in this Properties table is written out, one per line. For each entry the key string is written, then an ASCII =, then the associated element string. For the key, all space characters are written with a preceding \ character. For the element, leading space characters, but not embedded or trailing space characters, are written with a preceding \ character. The key and element characters #, !, =, and : are written with a preceding backslash to ensure that they are properly loaded.

After the entries have been written, the output stream is flushed. The output stream remains open after this method returns.

Parameters:
- writer - an output character stream writer.
- comments - a description of the property list.
Throws:
- IOException - if writing this property list to the specified output stream throws an IOException.
- ClassCastException - if this Properties object contains any keys or values that are not Strings.
- NullPointerException - if writer is null.
Since: 1.6

  Emits an XML document representing all of the properties contained in this table.

  Emits an XML document representing all of the properties contained in this table.

An invocation of this method of the form props.storeToXML(os, comment) behaves in exactly the same way as the invocation props.storeToXML(os, comment, "UTF-8");.
Parameters:
- os - the output stream on which to emit the XML document.
- comment - a description of the property list, or null if no comment is desired.
Throws:
- IOException - if writing to the specified output stream results in an IOException.
- NullPointerException - if os is null.
- ClassCastException - if this Properties object contains any keys or values that are not Strings.
Since: 1.5
See Also: Properties.loadFromXML(InputStream),

  Emits an XML document representing all of the properties contained in this table, using the specified encoding.

  Emits an XML document representing all of the properties contained in this table, using the specified encoding.

The XML document will have the following DOCTYPE declaration:

 <!DOCTYPE properties SYSTEM "http://java.sun.com/dtd/properties.dtd">
 

If the specified comment is null then no comment will be stored in the document.

The specified stream remains open after this method returns.
Parameters:
- os - the output stream on which to emit the XML document.
- comment - a description of the property list, or null if no comment is desired.
Throws:
- IOException - if writing to the specified output stream results in an IOException.
- NullPointerException - if os is null, or if encoding is null.
- ClassCastException - if this Properties object contains any keys or values that are not Strings.
Since: 1.5
See Also: Properties.loadFromXML(InputStream),

  Returns a set of keys in this property list where the key and its corresponding value are strings, including distinct keys in the default property list if a key of the same name has not already been found from the main properties list.

  Returns a set of keys in this property list where the key and its corresponding value are strings, including distinct keys in the default property list if a key of the same name has not already been found from the main properties list. Properties whose key or value is not of type String are omitted.

The returned set is not backed by the Properties object. Changes to this Properties are not reflected in the set, or vice versa.
Returns: a set of keys in this property list where the key and its corresponding value are strings, including the keys in the default property list.
Since: 1.6
See Also: Properties.defaults,

  Returns a string with the name and the version number of this provider.

  Returns a string with the name and the version number
of this provider.
Returns: the string with the name and the version number for this provider.

  Returns an unmodifiable Collection view of the property values contained in this provider.

  Returns an unmodifiable Collection view of the property values
contained in this provider.
Since: 1.2