子类在 Java 中是否能继承父类中的私有变量和私有方法?
不会,子类不能继承父类的私有成员,它只能继承父类的受保护的、没有的和公有的成员。如果你这么做,编译时就会出现错误:−
示例
class Super{ private int data = 30; public void display(){ System.out.println("Hello this is the method of the super class"); } } public class Sub extends Super{ public void greet(){ System.out.println("Hello this is the method of the sub class"); } public static void main(String args[]){ Sub obj = new Sub(); System.out.println(obj.data); } }
执行此示例时,将会出现如下所示的编译时错误:−
Exception in thread "main" java.lang.Error: Unresolved compilation problem: The field Super.data is not visible at Sub.main(Sub.java:13)
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