day10-接口的概念与定义格式
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package com.inmind.interface01;
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public class Demo01 {
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}
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package com.inmind.interface01;
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/*
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接口就是生活中的规范,规则
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定义格式
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public interface 接口名 {
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}
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jdk7之前:抽象方法,常量
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jdk8:默认方法,静态方法
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jdk9:私有方法
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*/
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public interface MyInterface {
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}
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