作为作业的一部分,我必须产生一个称为Registry的LinkedList类。它旨在成为具有接口的简单学生注册系统的一部分。
不幸的是,我确实碰壁了,不知道下一步该怎么做。Registry类仅用于管理一个称为studentList的学生链接列表。
以下是我到目前为止所进行的当前的,但还不完整的课程。
import java.util.*;
public class Registry
{
LinkedList<Student> studentList;
public Registry()
{
}
public void addStudent(Student aStudent)
{
studentList.add(aStudent);
}
public void deleteStudent(int studentID)
{
studentList.remove(studentID);
}
@Override
public String toString()
{
return getClass().getName() +
}
public String format()
{
System.out.format(studentList);
}
}
现在,我主要担心的是使用Student。作为作业的一部分,我必须制作另一个名为Student的类,该类创建Student的实例,其中包含形式,姓氏,Student ID和学位方案作为字符串。
我将如何使用该单独的类将其添加到Registry中实例化的LinkedList中?以及如何使Registry类完全发挥作用?
我将尝试根据要求提供任何其他详细信息。我可能不清楚,所以如果我愿意,请告诉我,我会尽力解释。
编辑:这是要求的学生班:
public class Student
{
private String foreName;
private String surName;
private String studentID;
private String degreeScheme;
public Student()
{
}
public void setForeName(String foreName)
{
this.foreName = foreName;
}
public String getForeName()
{
return foreName;
}
public void setSurName(String surName)
{
this.surName = surName;
}
public String getSurName()
{
return surName;
}
public void setStudentID(String studentID)
{
this.studentID = studentID;
}
public String getStudentID()
{
return studentID;
}
public void setDegreeScheme(String degreeScheme)
{
this.degreeScheme = degreeScheme;
}
public String getDegreeScheme()
{
return degreeScheme;
}
@Override
public String toString()
{
return getClass().getName() + "[foreName = " + foreName + " surName "
+ surName + " studentID " + studentID + " degreeScheme "
+ degreeScheme + "]";
}
public void format()
{
System.out.format("%5s%20s%11s%20s", foreName, surName, studentID, degreeScheme);
}
}
import java.util.Iterator;
import java.util.LinkedList;
public class Tester {
public static void main(String[] args) {
Registry r = new Registry();
r.addStudent(new Student("13", "John", "Doe", "Physics")); // Add a student to the Registry
r.addStudent(new Student("212", "Jane", "Bow", "Chem")); // Add another Student
System.out.println(r); // Print the Student List
r.deleteStudent(212); // Deletes student with ID 212
System.out.println(r);
}
}
class Student {
private String studentID;
private String foreName;
private String surName;
private String degreeScheme;
public Student(String studentId, String foreName, String surName, String degreeScheme) {
this.studentID = studentId;
this.foreName = foreName;
this.surName = surName;
this.degreeScheme = degreeScheme;
}
public void setForeName(String foreName) {
this.foreName = foreName;
}
public String getForeName() {
return foreName;
}
public void setSurName(String surName) {
this.surName = surName;
}
public String getSurName() {
return surName;
}
public void setStudentID(String studentID) {
this.studentID = studentID;
}
public String getStudentID() {
return studentID;
}
public void setDegreeScheme(String degreeScheme) {
this.degreeScheme = degreeScheme;
}
public String getDegreeScheme() {
return degreeScheme;
}
@Override
public String toString() {
return getClass().getName() + "[foreName = " + foreName + " surName " + surName + " studentID "
+ studentID + " degreeScheme " + degreeScheme + "]";
}
public void format() {
System.out.format("%5s%20s%11s%20s", foreName, surName, studentID, degreeScheme);
}
}
class Registry {
LinkedList<Student> studentList;
public Registry() { // Creates studentList
studentList = new LinkedList<>();
}
public void addStudent(Student aStudent) {
studentList.add(aStudent);
}
public void deleteStudent(int studentID) {
int index = searchList(studentID); // Gets index of the student in the Registry
if (index == -1)
throw new IllegalArgumentException("Student not found");
// Since studentList is implemented as LinkedList, .remove removes element at specified position
studentList.remove(index);
}
// Search by studentID , if found, return position in the list
private int searchList(int studentID) {
Iterator<Student> it = studentList.iterator();
int count = -1;
while (it.hasNext()) {
count++;
Student temp;
temp = it.next();
if (Integer.parseInt(temp.getStudentID()) == studentID) {
return count;
}
}
return -1;
}
@Override
//Suggestions to improve the toString are welcome
public String toString() {
for (Student student : studentList) {
student.format();
System.out.println();
}
return "";
}
}
本文收集自互联网,转载请注明来源。
如有侵权,请联系 [email protected] 删除。
我来说两句