day09-继承中成员变量的访问特点

day09/src/com/inmind/extends_member02/Demo02.java

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+package com.inmind.extends_member02;
+/*
+.继承中成员变量的访问特点
+1.直接通过对象去访问，看对象创建语句=左边的内容，是谁就优先使用谁的成员变量，如果没有则向上找
+2.间接通过对象调用成员方法去访问，调用时，方法属于谁，就优先使用谁的成员变量，如果没有则向上找
+ */
+public class Demo02 {
+    public static void main(String[] args) {
+        //直接创建子类对象
+        Zi zi = new Zi();
+        System.out.println(zi.numFu);//200
+        System.out.println(zi.numZi);//100
+        System.out.println(zi.num);//101
+        System.out.println("----------");
+        zi.methodZi();
+        System.out.println("----------");
+        zi.methodFu();
+    }
+}

day09/src/com/inmind/extends_member02/Fu.java

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+package com.inmind.extends_member02;
+//父类
+public class Fu {
+    int numFu = 200;
+    int num = 201;
+    public void methodFu(){
+        System.out.println(numFu);
+        System.out.println(num);
+    }
+}

day09/src/com/inmind/extends_member02/Zi.java

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+package com.inmind.extends_member02;
+//子类
+public class Zi extends Fu {
+    int numZi = 100;
+    int num = 101;
+
+    public void methodZi(){
+        System.out.println(numFu);
+        System.out.println(numZi);
+        System.out.println(num);
+    }
+}