package com.mufeng.thetenthchapter;

interface Counter {
	int next();
}

public class LocalInnerClass {
	private int count = 0;

	Counter getCounter(final String name) {
		class LocalCounter implements Counter {

			public LocalCounter() {
				// TODO Auto-generated constructor stub
				// Local inner class can have a constructor
				System.out.println("LocalCounter()");
			}

			@Override
			public int next() {
				// TODO Auto-generated method stub
				System.out.print(name);
				return count++;
			}

		}

		return new LocalCounter();
	}

	Counter getCounter2(final String name) {
		return new Counter() {
			// Anonymous inner class cannot have named constructor,only an
			// instance initializer
			{
				System.out.println("Counter()");
			}

			@Override
			public int next() {
				// TODO Auto-generated method stub
				System.out.print(name);
				return count++;
			}

		};
	}

	public static void main(String[] args) {
		LocalInnerClass lic = new LocalInnerClass();

		Counter c1 = lic.getCounter("Local inner "), 
				c2 = lic.getCounter2("Anonymous inner ");
		for (int i = 0; i < 5; i++) {
			System.out.println(c1.next());
		}

		for (int i = 0; i < 5; i++) {
			System.out.println(c2.next());
		}
	}
}

输出结果

LocalCounter()
Counter()
Local inner 0
Local inner 1
Local inner 2
Local inner 3
Local inner 4
Anonymous inner 5
Anonymous inner 6
Anonymous inner 7
Anonymous inner 8
Anonymous inner 9