如何只改动注释的那一句,使得子类能够继承父类的private
public class people {
private int averHeight=166;
private int getAverHeight() {
return averHeight;
}
}
class ChinaPeople extends people{
int height;
public void setHeight(int h) {
height=height+averHeight;//非法
height=h;
}
public int getHeighgt() {
return height;
}
}
public class Exam {
public static void main(String args[]) {
ChinaPeople zhangsan=new ChinaPeople();
System.out.println(zhangsan.getAverageHeight());
zhangsan.setHeight(178);
System.out.println(zhangsan.getHeighgt());
}
}
private 修饰的变量,只有自己能访问,其他类都不能访问;
子类继承父类,实例化时其实内存中已经有这个父类的私有变量了,只需要 提供public 或 protected的 get方法,子类就可以使用
class people {
private int averHeight=166;
public int getAverHeight() {
return averHeight;
}
}
class ChinaPeople extends people{
int height;
public void setHeight(int h) {
height=height+getAverHeight();
height=h;
}
public int getHeighgt() {
return height;
}
}
public class Exam {
public static void main(String args[]) {
ChinaPeople zhangsan=new ChinaPeople();
System.out.println(zhangsan.getAverHeight());
zhangsan.setHeight(178);
System.out.println(zhangsan.getHeighgt());
}
}
继承不了的啊~public、protected、private 三者的作用、区别记得吗
要不加个get函数吧