From 7247d6a5372d9aa6ec51e0c40719579d41902ac0 Mon Sep 17 00:00:00 2001 From: xuxin <840198532@qq.com> Date: Tue, 28 Jul 2026 10:22:13 +0800 Subject: [PATCH] =?UTF-8?q?day11-=E5=9B=9B=E7=A7=8D=E6=9D=83=E9=99=90?= =?UTF-8?q?=E4=BF=AE=E9=A5=B0=E7=AC=A6?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- day11/src/com/inmind/limit02/Class1.java | 21 ++++++++++++++++++++ day11/src/com/inmind/limit02/Class2.java | 10 ++++++++++ day11/src/com/inmind/limit02/Demo02.java | 11 ++++++++++ day11/src/com/inmind/limit02/sub/Class3.java | 12 +++++++++++ day11/src/com/inmind/limit02/sub/Class4.java | 12 +++++++++++ 5 files changed, 66 insertions(+) create mode 100644 day11/src/com/inmind/limit02/Class1.java create mode 100644 day11/src/com/inmind/limit02/Class2.java create mode 100644 day11/src/com/inmind/limit02/Demo02.java create mode 100644 day11/src/com/inmind/limit02/sub/Class3.java create mode 100644 day11/src/com/inmind/limit02/sub/Class4.java diff --git a/day11/src/com/inmind/limit02/Class1.java b/day11/src/com/inmind/limit02/Class1.java new file mode 100644 index 0000000..007a1be --- /dev/null +++ b/day11/src/com/inmind/limit02/Class1.java @@ -0,0 +1,21 @@ +package com.inmind.limit02; + +public class Class1 { + //定义4个不同权限的静态变量 + private static int num1 = 1;//私有 + static int num2 = 2;//默认 + protected static int num3 = 3;//保护 + public static int num4 = 4;//公有 + + public static void method(){ + System.out.println(num1); + System.out.println(num2); + System.out.println(num3); + System.out.println(num4); + } + + public static void main(String[] args) { + method(); + } + +} diff --git a/day11/src/com/inmind/limit02/Class2.java b/day11/src/com/inmind/limit02/Class2.java new file mode 100644 index 0000000..3ad1ea5 --- /dev/null +++ b/day11/src/com/inmind/limit02/Class2.java @@ -0,0 +1,10 @@ +package com.inmind.limit02; + +public class Class2 { + public static void main(String[] args) { + //System.out.println(Class1.num1);//在同一个包中，私有不能访问 + System.out.println(Class1.num2); + System.out.println(Class1.num3); + System.out.println(Class1.num4); + } +} diff --git a/day11/src/com/inmind/limit02/Demo02.java b/day11/src/com/inmind/limit02/Demo02.java new file mode 100644 index 0000000..4d5b452 --- /dev/null +++ b/day11/src/com/inmind/limit02/Demo02.java @@ -0,0 +1,11 @@ +package com.inmind.limit02; +/* +四种权限修饰符:权限修饰符，可以用来修饰类，方法，成员变量 + public > protected > (default) > private +在同一个类中 YES YES YES YES +在同一包中 YES YES YES NO +在不同包中（父子类关系） YES YES NO NO +在不同包中（!父子类关系） YES NO NO NO + */ +public class Demo02 { +} diff --git a/day11/src/com/inmind/limit02/sub/Class3.java b/day11/src/com/inmind/limit02/sub/Class3.java new file mode 100644 index 0000000..099d524 --- /dev/null +++ b/day11/src/com/inmind/limit02/sub/Class3.java @@ -0,0 +1,12 @@ +package com.inmind.limit02.sub; + +import com.inmind.limit02.Class1; + +public class Class3 extends Class1{ + public static void main(String[] args) { + //System.out.println(Class1.num1);//在不同包中（父子类关系），私有不能访问 + //System.out.println(Class1.num2);//在不同包中（父子类关系），默认不能访问 + System.out.println(Class1.num3); + System.out.println(Class1.num4); + } +} diff --git a/day11/src/com/inmind/limit02/sub/Class4.java b/day11/src/com/inmind/limit02/sub/Class4.java new file mode 100644 index 0000000..0556c6c --- /dev/null +++ b/day11/src/com/inmind/limit02/sub/Class4.java @@ -0,0 +1,12 @@ +package com.inmind.limit02.sub; + +import com.inmind.limit02.Class1; + +public class Class4 { + public static void main(String[] args) { + //System.out.println(Class1.num1);//在不同包中（!父子类关系），私有不能访问 + //System.out.println(Class1.num2);//在不同包中（!父子类关系），默认不能访问 + //System.out.println(Class1.num3);//在不同包中（!父子类关系），保护不能访问 + System.out.println(Class1.num4);//公共权限，是最大的权限，都可以访问！！！ + } +}