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第18篇：Java的类变量、类方法；static 关键字；静态导入；初始化块；静态初始化块；单例模式

一、static☘️ static 可用来修饰类的成员：成员变量、方法、嵌套类public class Person { /* static 可以修饰成员变量 */ private static int age; /* static 可以修饰成员方法 */ public static void ea...

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