吃透Java基础一：Java访问权限修饰符

本文主要是介绍吃透Java基础一：Java访问权限修饰符，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

	同类	同包	同包子类	不同包子类	不同包
public	√	√	√	√	√
protected	√	√	√	√
包访问权限	√	√	√
private	√

下面看例子：
base包下定义Father类，四种权限定义方法

package base;
public class Father {public void showPublic() {}protected void showProtected() {}void showFriendly() {}private void showPrivate() {}
}

同包子类

package base;public class Son extends Father {public static void main(String[] args) {Son son = new Son();son.showPublic();son.showProtected();son.showFriendly();
//        son.showPrivate();报错}
}

同包其它类

package base;
public class Other {public static void main(String[] args) {Father father = new Father();father.showPublic();father.showProtected();father.showFriendly();
//        father.showPrivate();报错}
}

不同包子类

package text;import base.Father;public class AnotherSon extends Father {public static void main(String[] args) {AnotherSon anotherSon = new AnotherSon();anotherSon.showPublic();anotherSon.showProtected();
//        anotherSon.showFriendly();报错
//        anotherSon.showPrivate();报错}
}

不同包其它类

package text;import base.Father;public class Another {public static void main(String[] args) {Father father = new Father();father.showPublic();
//        father.showProtected();报错
//        father.showFriendly();报错
//        father.showPrivate();报错}
}