我定义了个,Person类,
package person;public class Person {
protected String name;
protected String ID;
protected int age;
public Person() {
name = "tangqiang";
age = 18;
ID = "511023198807026917";只有部分。
编译后的.class文件放person文件下
现有定义一个类
package person.students;import person.*;public class Student extends Person {
protected String number;
protected String school;
public Student() {
super();
number = "2008001505";
school = "taiyuanligongdaxue";
}
public Student(String nameOrID,String numberOrSchool) {
super(nameOrID);
if(numberOrSchool.length() == 10) {
number = numberOrSchool;
school = "taiyuanligongdaxue";
}
else {
school = numberOrSchool;
number = "2008001505";
}
}只有部分代码。
把Student.java文件放在person文件所在的文件夹中
让后我编译Student.java出现如下问题:我觉得是包和引用有问题就是不知怎么改?Student.java:5: 找不到符号
符号: 类 Person
public class Student extends Person {
^
Student.java:60: 找不到符号
符号: 变量 super
位置: 类 person.students.Student
System.out.println("Student: name:" + super.name + " ID:" + ID + " age
:" + age + " number:" + number + " school:" + school);
^
Student.java:60: 找不到符号
符号: 变量 ID
位置: 类 person.students.Student
System.out.println("Student: name:" + super.name + " ID:" + ID + " age
:" + age + " number:" + number + " school:" + school);
^
Student.java:60: 找不到符号
符号: 变量 age
位置: 类 person.students.Student
System.out.println("Student: name:" + super.name + " ID:" + ID + " age
:" + age + " number:" + number + " school:" + school);
package person;public class Person {
protected String name;
protected String ID;
protected int age;
public Person() {
name = "tangqiang";
age = 18;
ID = "511023198807026917";只有部分。
编译后的.class文件放person文件下
现有定义一个类
package person.students;import person.*;public class Student extends Person {
protected String number;
protected String school;
public Student() {
super();
number = "2008001505";
school = "taiyuanligongdaxue";
}
public Student(String nameOrID,String numberOrSchool) {
super(nameOrID);
if(numberOrSchool.length() == 10) {
number = numberOrSchool;
school = "taiyuanligongdaxue";
}
else {
school = numberOrSchool;
number = "2008001505";
}
}只有部分代码。
把Student.java文件放在person文件所在的文件夹中
让后我编译Student.java出现如下问题:我觉得是包和引用有问题就是不知怎么改?Student.java:5: 找不到符号
符号: 类 Person
public class Student extends Person {
^
Student.java:60: 找不到符号
符号: 变量 super
位置: 类 person.students.Student
System.out.println("Student: name:" + super.name + " ID:" + ID + " age
:" + age + " number:" + number + " school:" + school);
^
Student.java:60: 找不到符号
符号: 变量 ID
位置: 类 person.students.Student
System.out.println("Student: name:" + super.name + " ID:" + ID + " age
:" + age + " number:" + number + " school:" + school);
^
Student.java:60: 找不到符号
符号: 变量 age
位置: 类 person.students.Student
System.out.println("Student: name:" + super.name + " ID:" + ID + " age
:" + age + " number:" + number + " school:" + school);
你自己都这么写的:package person.students;
你这是新建了另一个包了。。student.java文件应该放在这里面啊 你怎么放在person包里了