Java 继承后成员的隐藏与重写(示例详解)

目录

• Java 继承后成员的隐藏与重写

Java 继承后成员的隐藏与重写

1、子类没有定义成员

1. BaseCommonStore.java

public class BaseCommonStore {
    public static finaphpl String TAG = "TAG:" + BaseCommonStore.class.getSimpleName();
    public static void sayHello() {
        System.out.println(TAG + " sayHello");
    }
    public String tag = "tag:" + BaseCommonStore.class.getSimpleName();
    public void sayOk() {
        System.out.println(tag + " sayOk");android
    }
}

2. CommonStore.java

public class CommonStore extends BaseCommonStore {
}

3. test

System.out.println(CommonStore.TAG);
CommonStore.sayHello();
CommonStore commonStore = new CommonStore();
System.out.println(commonStore.tag);
commonStore.sayOk();

# 输出结果
TAG:BaseCommonStore
TAG:BaseCommonStore sayHello
tag:BaseCommonStore
tag:BaseCommonStore sayOk

2、子类定义同名成员

1. BaseCommonStore.java

public class BaseCommonStore {
    public static final String TAG = "TAG:" + BaseCommonStore.class.getSimpleName();
    public static void sayHello() {
        System.out.println(TAG + " sayHello");
    }
    public String tag = "tag:" + BaseCommonjavascriptStore.class.getSimpleName();
    public void sayOk() {
        System.out.println(tag + " sayOk");
    }
}

2. CommonStore.java

public class CommonStore extends BaseCommonStore {
    public static final String TAG = "TAG:" + CommonStore.class.getSimpleName();
    public static void sayHello() {
        System.out.println(TAG + " sphpayHello");
    }
    public String tag = "tag:" + CommonStore.class.getSimpleName();
    public void sayOk() {
        System.out.println(tag + " sayOk");
    }
}

3. test

System.out.println(CommonStore.TAG);
CommonStore.sayHello();
CommonStore commonStore = new CommonStore();
System.out.println(commonStore.tag);
commonStore.sayOk();

# 输出结果
TAG:CommonStore
TAG:CommonStore sayHello
tag:CommonStore
tag:CommonStore sayOk

小结

到此这篇关于Java 继承后成员的隐藏与重写(示例详解)的文章就介绍到这android了,更多相关java隐藏与重写内容请搜索编程客栈(www.devze.com)以前的文章或继续浏览下面的相关文章希望大家以后多多支持编程客栈(www.devze.com)！