Returns a string representation of this map. The string representation
consists of a list of key-value mappings in the order returned by the
map's <tt>entrySet</tt> view's iterator, enclosed in braces
(<tt>"{}"</tt>). Adjacent mappings are separated by the characters
<tt>", "</tt> (comma and space). Each key-value mapping is rendered as
the key followed by an equals sign (<tt>"="</tt>) followed by the
associated value. Keys and values are converted to strings as by
{@link string#valueOf(Object)}.
Returns a string representation of this map. The string representation consists of a list of key-value mappings in the order returned by the map's <tt>entrySet</tt> view's iterator, enclosed in braces (<tt>"{}"</tt>). Adjacent mappings are separated by the characters <tt>", "</tt> (comma and space). Each key-value mapping is rendered as the key followed by an equals sign (<tt>"="</tt>) followed by the associated value. Keys and values are converted to strings as by {@link string#valueOf(Object)}.
@return a string representation of this map