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A local class is defined within a block a Java code, typically a method, but also static and instance initializers.
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The local class is only visible within the block of code in which its defined.
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It can use any final (can't be overriden by subclass) local variables or method parameters within its scope.
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Syntax: just declare the class and use it entirely within one block, such as a method. (Note that use of "final" modifier is liberalized.)
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Unlike member classes, local classes can refer to local variables of block they're defined in.
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Typical use of local classes is to define "event listeners".
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There are also anonymous local classes, introduced without a name. Special syntax not covered here.
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