java数组编写学生管理系统

1、package org.niit;import org.niit.Student;import java.util.Scanner;/导入键盘输入类public class demo1 public static void main(String args) / TODO Auto-generated method stub/实例化键盘输入类Scanner in = new Scanner(System.in);/定义学生数组Student stus = new Student3;/实例化学生int size = 0 ;/初始学生数量/用户菜单int menu = 0;doSystem.out

2、.println(主菜单！);System.out.println(1.添加！);System.out.println(2.修改！);System.out.println(3.删除！);System.out.println(4.打印！);System.out.println(5.退出！);/接收输入的选项System.out.println(请选择！);menu = in.nextInt();/判断选项switch(menu)case 1:System.out.println(添加学生);/实例化学生stussize = new Student();/判断是否超出数组长度if(size=stu

3、s.length)/备份原来的数组Student stus_back = stus;/重新定义数组的长度 stus = new Studentsize*2;/放回备份数据for(int i = 0;i=stus_back.length;i+)stusi = stus_backi;/用户输入System.out.print(学号:);stussize.setId(in.nextInt();System.out.print(姓名:);stussize.setName(in.next();System.out.print(性别:);stussize.setSex(in.next();System.o

4、ut.print(年龄:);stussize.setAge(in.nextInt();size+;/学生数量加1System.out.println(n-添加学生完成-n);break;case 2:System.out.print(请输入要修改学生的学号:);int num = in.nextInt();/找到这个学生并修改int a = -1;/查找 for(int i=0;isize;i+) if(stusi.getId() = num) a = i; break; if(a!=-1)/输入修改信息System.out.print(学号:);stusa.setId(in.nextInt(

5、);System.out.print(姓名:);stusa.setName(in.next();System.out.print(性别:);stusa.setSex(in.next();System.out.print(年龄:);stusa.setAge(in.nextInt();System.out.print(修改完成);else System.out.println(没有这个学生！); break;case 3:System.out.print(请输入要删除学生的学号:);int Num = in.nextInt();/找到这个学生并删除int b = -1;/查找 for(int i=

6、0;isize;i+) if(stusi.getId() = Num) b = i; break; if(b!=-1)for(int i=b;isize-1;i+)stusi = stusi+1;System.out.println(学号为:+Num+ 的学生已经删除);size-;elseSystem.out.println(没有这个学生！);break;case 4:/打印for(int i = 0;isize;i+)System.out.println(stusi.getId()+t+stusi.getName()+t+stusi.getSex()+t+stusi.getAge();br

7、eak;case 5:System.out.println(谢谢使用！);break;while(menu!=5);package org.niit;public class Student / TODO Auto-generated method stub/私有化private int id; private String name;private String sex;private int age;/编写settre和getter/nopublic void setId(int id)this.id = id;public int getId()return id;/namepublic void setName(String name) = name;public String getName()return name;/sexpublic void setSex(String sex)if(sex=男|sex=女)this.sex = sex;elsethis.sex = 男;public String getSex()return sex;/agepublic void s