Java实例---简单的上课管理系统
源码分析
Course.java
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1 package com.ftl.many2many; 2 3 import java.util.*; 4 5 public class Course 6 { 7 private int credit; 8 private String name; 9 private List<Student> allStudent; 10 public int getCredit() 11 { 12 return credit; 13 } 14 public void setCredit(int credit) 15 { 16 this.credit = credit; 17 } 18 public String getName() 19 { 20 return name; 21 } 22 public void setName(String name) 23 { 24 this.name = name; 25 } 26 public List<Student> getAllStudent() 27 { 28 return allStudent; 29 } 30 public void setAllStudent(List<Student> allStudent) 31 { 32 this.allStudent = allStudent; 33 } 34 public Course() 35 { 36 this.allStudent = new ArrayList<Student>(); 37 } 38 public Course(String name, int credit) 39 { 40 this(); 41 this.setCredit(credit); 42 this.setName(name); 43 } 44 45 public String toString() 46 { 47 return "课程名称:" + this.name + "\t课程学分:" + this.credit; 48 } 49 }
School.java
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1 package com.ftl.many2many; 2 3 import java.io.*; 4 import java.util.*; 5 public class School 6 { 7 private String name; 8 private List<Student> allStudent; 9 public School() 10 { 11 this.allStudent = new ArrayList<Student>(); 12 } 13 public School(String name) 14 { 15 this(); 16 this.name = name; 17 } 18 public String getName() { 19 return name; 20 } 21 public void setName(String name) { 22 this.name = name; 23 } 24 public List<Student> getAllStudent() { 25 return allStudent; 26 } 27 public void setAllStudent(List<Student> allStudent) { 28 this.allStudent = allStudent; 29 } 30 public String toString() 31 { 32 return "学校姓名" + this.name; 33 } 34 35 36 37 }
Student.java
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1 package com.ftl.many2many; 2 3 import java.util.*; 4 public class Student 5 { 6 private int age; 7 private String name; 8 private School school; 9 private List<Course> allCourse; 10 11 public Student() 12 { 13 this.allCourse = new ArrayList<Course>(); 14 } 15 public Student(String name, int age) 16 { 17 this(); 18 this.setName(name); 19 this.setAge(age); 20 } 21 public String getName() { 22 return name; 23 } 24 public void setName(String name) { 25 this.name = name; 26 } 27 public School getSchool() { 28 return school; 29 } 30 public void setSchool(School school) { 31 this.school = school; 32 } 33 public int getAge() { 34 return age; 35 } 36 public void setAge(int age) { 37 this.age = age; 38 } 39 public List<Course> getAllCourse() { 40 return allCourse; 41 } 42 public void setAllCourse(List<Course> allCourse) { 43 this.allCourse = allCourse; 44 } 45 public String toString() 46 { 47 return "学生姓名:" + this.name + "\t 年龄:" + this.age; 48 } 49 }
testDemo.java
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1 package com.ftl.many2many; 2 3 import java.util.Iterator; 4 5 public class testDemo 6 { 7 public static void main(String[] args) 8 { 9 School sch = new School("海风大学"); 10 Student s1 = new Student("张三", 12); 11 Student s2 = new Student("赵四", 22); 12 Student s3 = new Student("张5", 11); 13 Course c1 = new Course("计算机", 3); 14 Course c2 = new Course("语文", 1); 15 Course c3 = new Course("数学", 2); 16 //3个学生一个学校 17 s1.setSchool(sch); 18 s2.setSchool(sch); 19 s3.setSchool(sch); 20 //一个学校3个学生 21 sch.getAllStudent().add(s1); 22 sch.getAllStudent().add(s2); 23 sch.getAllStudent().add(s3); 24 //第一门课3个xues 25 c1.getAllStudent().add(s3); 26 c1.getAllStudent().add(s2); 27 c1.getAllStudent().add(s1); 28 s2.getAllCourse().add(c2); 29 s1.getAllCourse().add(c1); 30 s3.getAllCourse().add(c3); 31 32 //第二门一个学生 33 c2.getAllStudent().add(s3); 34 s3.getAllCourse().add(c2); 35 c3.getAllStudent().add(s3); 36 s3.getAllCourse().add(c3); 37 //输出一门课信息,观察一门课多少学生: 38 System.out.println(c1); 39 Iterator<Student> iter = null; 40 iter = c1.getAllStudent().iterator(); 41 System.out.println("C1 选课情况 : "); 42 while(iter.hasNext()) 43 { 44 Student c = iter.next(); 45 System.out.println("\t|-" + c); 46 } 47 System.out.println("----------------------------"); 48 System.out.println("学校学生情况: "); 49 iter = sch.getAllStudent().iterator(); 50 while(iter.hasNext()) 51 { 52 Student stu = (Student) iter.next(); 53 System.out.println("\t|-" + stu); 54 } 55 System.out.println("----------------------------"); 56 //张5的选课情况: 57 System.out.println("学生张武选课情况: "); 58 System.out.println(s3); 59 Iterator<Course> it = s3.getAllCourse().iterator(); 60 while(it.hasNext()) 61 { 62 Course c = it.next(); 63 System.out.println("\t|-" + c); 64 } 65 66 } 67 }
源码下载
作者:小a玖拾柒
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个性签名: 所有的事情到最後都是好的,如果不好,那說明事情還沒有到最後~
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