How to realize the simple Student status Management system by Java

这篇文章给大家分享的是有关Java怎么实现简易学籍管理系统的内容。小编觉得挺实用的，因此分享给大家做个参考，一起跟随小编过来看看吧。

具体内容如下

1、我们先来讲讲什么是泛型化编程

package 学生管理系统; import java.util.ArrayList;import java.util.List; /* * 进行泛型化编程 * @autor：pcb * */public class TestGeneric { //进行泛型化编程，规定类型。 public List courses; public TestGeneric() { this.courses = new ArrayList(); } public void testAdd() { CourseClass cr1 = new CourseClass("1","大学语文"); courses.add(cr1); //泛型集合中不能添加规定意外的对象 //courses.add("能否添加一些奇怪的东西"); CourseClass cr2 = new CourseClass("2","Java基础"); courses.add(cr2); } public void testForEach() { //进行泛型之后，可直接利用它规定的类型及其子类型直接进行访问 for(CourseClass cr:courses) { System.out.println(cr.id+":"+cr.name); } } //泛型集合可以添加泛型的子类型的对象实例 public void testChild() { ChildCourse ccr = new ChildCourse(); ccr.id = "3"; ccr.name = "我是子类的课程实例对象"; courses.add(ccr); } //泛型必须使用包装类型进行创建,例如：int和integer public void testBaic() { List list = new ArrayList(); list.add(1); System.out.println("基本类型必须使用包装类作为泛型!"+list.get(0)); } public static void main(String[] args) { TestGeneric tg = new TestGeneric(); tg.testAdd(); tg.testForEach(); tg.testChild(); tg.testForEach(); tg.testBaic(); //tg.testForEach(); }}

2、我们开始进行管理系统的创建，创建一个学生类和一个课程类

package 学生管理系统; import java.util.HashSet;import java.util.Set;public class StudentsClass implements Comparable { public String id; public String name; public Set courses; public StudentsClass(String id,String name){ this.id=id; this.name=name; this.courses=new HashSet(); } @Override public int hashCode() { final int prime = 31; int result = 1; result = prime * result + ((name == null) ? 0 : name.hashCode()); return result; } @Override public boolean equals(Object obj) { if (this == obj) return true; if (obj == null) return false; if (!(obj instanceof StudentsClass)) return false; StudentsClass other = (StudentsClass) obj; if (name == null) { if (other.name != null) return false; } else if (!name.equals(other.name)) return false; return true; } public int compareTo(StudentsClass o) { return this.id.compareTo(o.id); }}package 学生管理系统; public class CourseClass { public String id; public String name; public CourseClass(String id,String name){ this.id=id; this.name=name; } public CourseClass() { } @Override public int hashCode() { final int prime = 31; int result = 1; result = prime * result + ((name == null) ? 0 : name.hashCode()); return result; } @Override public boolean equals(Object obj) { if (this == obj) return true; if (obj == null) return false; if (!(obj instanceof CourseClass)) return false; CourseClass other = (CourseClass) obj; if (name == null) { if (other.name != null) return false; } else if (!name.equals(other.name)) return false; return true; }}

3、利用List进行增加课程，删除课程，修改课程等的操作

package 学生管理系统;import java.util.ArrayList;import java.util.Arrays;import java.util.Iterator;import java.util.List; public class ListTest { //创建public List coursesToSelect; //构造器 public ListTest(){ this.coursesToSelect = new ArrayList(); } public void testAdd(){ //加课 CourseClass cr1 = new CourseClass("1","数据结构"); coursesToSelect.add(cr1); CourseClass temp = (CourseClass)coursesToSelect.get(0); System.out.println("添加了课程:"+temp.id+":"+temp.name); CourseClass cr2 = new CourseClass("2","c语言"); coursesToSelect.add(0, cr2); CourseClass temp2 = (CourseClass)coursesToSelect.get(0); System.out.println("添加了课程:"+temp2.id+":"+temp2.name); CourseClass[] Course={new CourseClass("3","离散数学"),new CourseClass("4","汇编语言")}; coursesToSelect.addAll(Arrays.asList(Course)); CourseClass temp3 = (CourseClass)coursesToSelect.get(2); CourseClass temp4 = (CourseClass)coursesToSelect.get(3); System.out.println("添加了两门课程："+temp3.id+":"+temp3.name+";"+temp4.id+":"+temp4.name); CourseClass[] Course1= {new CourseClass("5","高等数学"),new CourseClass("6","大学英语")}; coursesToSelect.addAll(2, Arrays.asList(Course1)); CourseClass temp5 = (CourseClass)coursesToSelect.get(2); CourseClass temp6 = (CourseClass)coursesToSelect.get(3); System.out.println("添加了两门课程："+temp5.id+":"+temp5.name+";"+temp6.id+":"+temp6.name); } public void test() { int size = coursesToSelect.size(); for(int i=0;i