publicclassFirstClass{protectedString name;protectedFirstClass(String name){this.name = name; }protectedStringgetName(){returnname; } }Copy With this example, by using theprotectedkeyword, we’ve granted access to these fields to classes in the same package asFirstClassand to sub-classes ofFirst...
其中,protected是四种主要访问修饰符之一,其他三个是public、private和默认的包访问(package-private)。接下来,我们将深入探讨protected属性的含义及其在Java中的使用。 1.protected的定义 protected关键字主要用于类的成员(属性、方法),它使得这些成员能够被类的子类(无论子类是否在同一包中)以及同一包中的其他类访问。...
Protected Access Modifier - protected: Variables, methods and constructors which are declared protected in a superclass can be accessed only by the subclasses in other package or any class within the package of the protected members' class. The protected access modifier cannot be applied to class ...
Java 中的访问权限修饰符(Access Modifier)用于控制类、变量、方法、构造函数等的访问级别。Java 的访问权限修饰符共有四种: 1. public:表示该成员对于所有的类都是可见的,可以在任何地方被访问到。 2. protected:表示该成员被同一个包内的所有类可见,对于不同包中的子类也有效。 3. default(默认):即没有使用...
Java access modifiers are used to provide access control in java. Java provides access control through three keywords –private,protectedandpublic. We are not required to use these access modifiers always, so we have another one namely “default access“, “package-private” or “no modifier“....
5. Protected Betweenpublicandprivateaccess levels, there’s theprotectedaccess modifier. If we declare a method, property, or constructor with theprotectedkeyword, we can access the member from thesame package (as withpackage-privateaccess level), as well as from all subclasses of its class, eve...
对于成员,还有另外两个访问描述符来控制其访问:private和protected,private表示该成员只能在该类的内部使用(翻译成英文即是Theprivatemodifier specifies that the member can only be accessedinit's own class);protected表示该成员只能在该类所在的包内部使用,同时还能够被其他包中的子类访问(本包的类别说是子类,非...
Protected Access Modifier When methods and data members are declared protected, we can access them within the same package as well as from subclasses. For example, class Animal { // protected method protected void display() { System.out.println("I am an animal"); } } class Dog extends Ani...
package com.journaldev.access; import com.journaldev.access.TestA; public class TestB { public static void main(String args[]) { new TestA().methodPublic(); new TestA().methodProtected(); new TestA().methodDefault(); } public void methodPublic() { ...
Thedefaultaccess modifier means we do not explicitly declare an access modifier for a class, field, method, etc. The default members are accessible only by the classes in the same package. Let us remove theprotectedaccess from thedisplayMessage()in theDataclass. It changes the access todefault...