[英]"grade" cannot be resolved to a variable
I have this exercise and the question is how can I solve the error "grade" cannot be resolved to a variable, without declare it in the class teacher.我有这个练习,问题是如何解决错误“成绩”无法解析为变量,而无需在 class 老师中声明它。 I suppose is the only error in my code.
我想这是我的代码中唯一的错误。 It is evident for me WHY then in my output only the grade variable is not assigned, but I don't know HOW to solve it.
对我来说很明显为什么然后在我的 output 中只有等级变量没有分配,但我不知道如何解决它。
public class App {
public static void main(String[] args) throws Exception {
Student studentOne = new Student("FraPedu");
Student studentTwo = new Student("FraIla");
Teacher teacherOne = new Teacher();
teacherOne.teacherName = "Tiziana";
teacherOne.assignGrade(studentOne,10);
teacherOne.assignGrade(studentTwo,10);
studentOne.getStudentDetails();
studentTwo.getStudentDetails();
}
}
public class Student {
public String name;
public int grade;
public Student(String studentName) {
System.out.println("Student object has been created succesfully!");
name = studentName;
}
public void getStudentDetails() {
System.out.println("Student name and grade: " + name + " " + grade);
}
}
public class Teacher {
public String teacherName;
public Teacher() {
System.out.println("Teacher object has been created succesfully!");
}
public void assignGrade(Student alum, int finalGrade) {
grade = finalGrade;
}
}
You need to assign the grade to the Student
object you are passing to the assignGrade
method.您需要将成绩分配给您传递给
assignGrade
方法的Student
object。
public class Teacher {
public String teacherName;
public Teacher() {
System.out.println("Teacher object has been created succesfully!");
}
public void assignGrade(Student alum, int finalGrade) {
alum.grade = finalGrade; // << this is the line I changed
}
}
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