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Example
Running the Example
| | An anonymous class is a local class without a name.
It combines the syntax for class definition with the syntax for object
instantiation.
Interfaces cannot be defined anonymously. This is the ultimate extension of
what we've been doing over the past few examples.
Note:
- The syntax for anonymous classes is somewhat strange, and sometimes hard to format
readably.
- If the name following the
new is the
name of a class, the anonymous class is a subclass of
the named class.
- If the name following the
new
is the
name of an interface, the anonymous class is an
implementation of the named interface, and is a
subclass of Object.
- There is no way you can use an explicit
extends
or implements clause.
- Any arguments you specify are
implicitly passed to the superclass constructor
- Anonymous classes allow you to define
a "one-shot class" exactly where it is needed.
- Anonymous classes cannot have static members
- Anonymous classes may not
be declared public,
protected, private, or
static
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