今天看程式碼，看到幾個概念：內部類、區域性類、成員類、靜態成員類、匿名內部類；瞬間有種被搞糊塗了感覺。下面是一個小例子來對它們進行說明：

public class ClassTest{
    public static void main(String[] args) {
        ClassTest son = new ClassTest();
        
        //測試匿名類
        son.testAnonymous(new AnonymousClass() {
            @Override
            public void test() {
                System.out.println("1 -> " + this.getClass().isMemberClass());
                System.out.println("1 -> " + this.getClass().isAnonymousClass());
                System.out.println("1 -> " + this.getClass().isLocalClass());
                System.out.println("---------------------------------------");
            }
        });
        
        //測試成員類
        son.testMember();
        
        //測試靜態成員類
        new StaticMemberClass();
        
        //測試區域性類
        class LocalClass{
            public LocalClass(){
                System.out.println("4 -> " + this.getClass().isMemberClass());
                System.out.println("4 -> " + this.getClass().isAnonymousClass());
                System.out.println("4 -> " + this.getClass().isLocalClass());
                System.out.println("---------------------------------------");
            }
        }
        new LocalClass();
    }

    private void testAnonymous(AnonymousClass inner) {
        inner.test();
    }
    
    private void testMember() {
        new MemberClass();
    }
    
    /**
     * 介面，用於測試內部類
     * @author xinghzhang
     *
     */
    interface AnonymousClass{
        public void test();
    }
    
    /**
     * 靜態成員類
     * @author xinghzhang
     *
     */
    static class StaticMemberClass{
        public StaticMemberClass() {
            System.out.println("3 -> " + this.getClass().isMemberClass());
            System.out.println("3 -> " + this.getClass().isAnonymousClass());
            System.out.println("3 -> " + this.getClass().isLocalClass());
            System.out.println("---------------------------------------");
        }
    }
    /**
     * 成員類
     * @author xinghzhang
     *
     */
    class MemberClass{
        public MemberClass() {
            System.out.println("2 -> " + this.getClass().isMemberClass());
            System.out.println("2 -> " + this.getClass().isAnonymousClass());
            System.out.println("2 -> " + this.getClass().isLocalClass());
            System.out.println("---------------------------------------");
        }
    }
}