谁知道这代码错在哪了啊？搞了半天也没找出来。
class Person{
private String name;
void setName(String n){
this.name = n;
}
String getInfo(){
return "name is"+ this.name;
}
}
class Student extends Person{
private String school;
void setSchool(String s){
this.school = s;
}
String getInfo(){
return "name is "+ name + "; school is " + school;
}
}
public class TestPrivate{
public static void main(String[] args){
Person person = new Person();
Student student = new Student();
student.setName("bill");
student.setSchool("Peking University");
System.out.println(student.getInfo());
}
}
------解决方案--------------------
private String name;改成protected String name;才能在子类里直接访问name
------解决方案--------------------
name是private的，只能在声明这个变量的类中使用，所以可以在Person中添加一个public方法：
public String getName() {
return name;
}
然后Student的getInfo改为：
String getInfo() {
return "name is " + getName() + "; school is " + school;
}
------解决方案--------------------
- Java code
class Person { private String name; void setName(String n) { this.name = n; } String getName() { return name; } String getInfo() { return "name is" + this.name; }}class Student extends Person { private String school; void setSchool(String s) { this.school = s; } String getSchool() { return school; } String getInfo() { return "name is " + this.getName() + "; school is " + this.getSchool(); }}public class TestPrivate { public static void main(String[] args) { Person person = new Person(); Student student = new Student(); student.setName("bill"); student.setSchool("Peking University"); System.out.println(student.getInfo()); }}
------解决方案--------------------
private私有变量不能被子类直接使用，也可以在Person添加getName方法，然后在子类中直接调用
------解决方案--------------------