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  • JAVA 匿名内部类

    public interface A {
    
        public void func();
    
    }
    public class B implements A {
    
        public B() {
            // TODO Auto-generated constructor stub
        }
    
        @Override
        public void func() {
            // TODO Auto-generated method stub
            System.out.println("func B");
        }
    
    }
    public class C implements A {
    
        A a;
    
        public C() {
            // TODO Auto-generated constructor stub
        }
    
        public C(A a) {
            // TODO Auto-generated constructor stub
            this.a = a;
        }
    
        @Override
        public void func() {
            // TODO Auto-generated method stub
            System.out.println("func C");
            a.func();
        }
    
    }

    两种实现方式

    public class Test {
    
        public Test() {
            // TODO Auto-generated constructor stub
        }
    
        public static void main(String[] args) {
            // TODO Auto-generated method stub
    
            B b = new B();
            C c = new C(b);
            c.func();
    
            C c1 = new C(new A() {
    
                @Override
                public void func() {
                    // TODO Auto-generated method stub
                    System.out.println("new A()");
                }
    
            });
            c1.func();
        }
    
    }

    运行结果

    func C
    func B
    func C
    new A()
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  • 原文地址:https://www.cnblogs.com/zhangxuechao/p/13615576.html
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