package innerclasses;

interface Counter {
 int next();
}


/**
 * @Author ZhangGJ
 * @Date 2020年05月08日 10:36
 */
public class LocalInnerClass {
 private int count = 0;

 Counter getCounter(final String name) {
 // A local inner class:
 class LocalCounter implements Counter {
 LocalCounter() {
 // Local inner class can have a constructor
 System.out.println("LocalCounter()");
 }

 @Override
 public int next() {
 System.out.print(name); // Access local final
 return count++;
 }
 }
 return new LocalCounter();
 }

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

 @Override
 public int next() {
 System.out.print(name); // Access local final
 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());
 }
 }
}