javaTestHomeWork/StudentManager.java at master · Alice9364/javaTestHomeWork · GitHub

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importjava.util.ArrayList;
importjava.util.Scanner;

publicclassStudentMannger {
publicstaticArrayList<Student> list=newArrayList<>();
publicvoidaddStudent(Students){
list.add(s);
 }

publicvoidupdateStudent(Studentolds,Studentnews){
list.remove(olds);
list.add(news);
 }
publicvoidoutPutAll(){
for(Students:list)
System.out.println(s.toString());
 }
publicbooleanexit(){
list.clear();
returntrue;
 }
publicStudentquery(Stringname){
for(Students:list)
if (s.getName().equals(name)) {
returns;
 }
System.out.println("未找到");
returnnull;
 }
publicvoidApp(){
Scannersc=newScanner(System.in);

while(true) {
booleanisExit=false;
System.out.println("请选择操作：");
System.out.println("**********************************************************************");
System.out.println("* 1 插入 *");
System.out.println("* 2 查找 *");
System.out.println("* 3 删除 *");
System.out.println("* 4 修改 *");
System.out.println("* 5 输出 *");
System.out.println("* 6 退出 *");
System.out.println("**********************************************************************");
intcommand=sc.nextInt();
switch(command) {
case1:
System.out.println("请输入学号：");
intid=sc.nextInt();
System.out.println("请输入姓名：");
Stringname=sc.next();
System.out.println("请输入出生日期：");
StringbirDate=sc.next();
System.out.println("请输入性别：");
Stringsex=sc.next();
booleangender=false;
if(sex.equals("男"))
gender=true;
Students1=newStudent(id,name,birDate,gender);
addStudent(s1);
break;
case2:
System.out.println("请输入要查找的姓名：");
name=sc.next();
StudentqueryS=query(name);
System.out.println(queryS.toString());
break;
case3:
System.out.println("请输入要删除的姓名：");
name=sc.next();
deleteStudent(name);
break;
case4:
System.out.println("修改前学生姓名为：");
StringoldName=sc.next();
System.out.println("修改学生学号为：");
id=sc.nextInt();
System.out.println("修改学生姓名为：");
name=sc.next();
System.out.println("修改学生出生日期为：");
birDate=sc.next();
System.out.println("修改学生性别为：");
sex=sc.next();
gender=false;
if(sex.equals("男"))
gender=true;
StudentnewS=newStudent(id,name,birDate,gender);
StudentoldS=query(oldName);
updateStudent(oldS,newS);
break;
case5:
outPutAll();
break;
case6:
isExit=exit();
break;

 }
if(isExit)
break;
 }
 }
}