Student(1).zip

package Student; import java.util.Scanner; public class studentlist { static int count = 5; //当前图书库的图书数量 static Scanner scan; static Student[] studentlist = new Student[5]; static { studentlist[0] = new Student("张三", 20220101, 18, "语文", 60,"C"); studentlist[1] = new Student("李四", 20220102, 18, "数学", 92,"A"); studentlist[2] = new Student("王五", 20220103, 18, "英语",85,"B"); studentlist[3] = new Student("刘六", 20220104, 18, "面向程序设计",70,"B"); studentlist[4] = new Student("陈七", 20220105, 18, "体育",90,"A"); count = 5; scan = new Scanner(System.in); } public static void run(){ int userChoice = 0; //循环处理，直到用户选择了“0...退出” do{ displayMenu(); //读取用户输入 userChoice = scan.nextInt(); switch(userChoice){ case 0: System.out.println("成功退出系统，欢迎再次使用！"); break; case 1: printAllStudent(); break; case 2: addStudent(); break; case 3: deleteStudent(); break; case 4: findStudent(); break; default: System.out.println("输入非法,请重新输入！"); } }while(userChoice != 0); scan.close(); } static void displayMenu(){ //打印菜单 System.out.println("---------------------"); System.out.println(" 学生管理系统 "); System.out.println("---------------------"); System.out.println("| 0...退出系统 |"); System.out.println("| 1...显示学生 |"); System.out.println("| 2...增加学生 |"); System.out.println("| 3...删除学生 |"); System.out.println("| 4...查询学生 |"); System.out.println("---------------------"); System.out.print("请输入选项："); } static void printAllStudent(){ //循环打印所有的学生 System.out.println("---------------------------------------------------------------------------"); System.out.println("序号\t姓名\t\t学号\t课程\t\t期末成绩"); System.out.println("---------------------------------------------------------------------------"); for (int i = 0; i < count; i++){ System.out.println((i+1)+"\t"+studentlist[i].getSName()+"\t"+studentlist[i].getSId()+ "\t"+studentlist[i].getSGather()+"\t"+studentlist[i].getFinalGrades() + "\t"+studentlist[i].getOverallGrades()); } System.out.println("---------------------------------------------------------------------------"); } static void addStudent(){ //增加图书 if (count < 5){ System.out.println("----------------------------------------------"); System.out.print("请输入学生："); String SName = scan.next(); System.out.print("请输入学号："); int SId = scan.nextInt(); System.out.print("请输入年龄："); int Sage = scan.nextInt(); System.out.print("请输入课程："); String Class = scan.next(); System.out.print("请输入期末成绩："); int FinalGrades = scan.nextInt(); System.out.print("请输入总评成绩："); String OverallGrades = scan.next(); Student student = new Student(SName,SId,Sage,Class,FinalGrades,OverallGrades); studentlist[count] = student; count++; System.out.println("成功增加1位同学！当前学生信息如下："); printAllStudent(); } else{ System.out.println("学生信息已满！"); } } static void deleteStudent(){ //删除图书 int id = -1; while(true){ printAllStudent(); System.out.print("请输入序号删除学生，输入0返回主菜单: "); int userChoice = scan.nextInt(); if(userChoice == 0){ break; } else { id = findByOrder(userChoice); if(id > -1) { for(int j = id; j < count-1; j++){ //用for循环的形式实现对数组的删除 studentlist[j] = studentlist[j+1]; } count --; System.out.println("删除成功！"); } else System.out.println("输入错误！请重新输入！"); } } } static void findStudent(){ //查询学生 while(true){ System.out.println("----------------------------------------------"); System.out.println("请输入按哪种方法查找学生：0、返回主菜单 1、学生名 2、学号 "); int userChoice = scan.nextInt(); if(userChoice == 0) { break; } else if(userChoice >= 3) { System.out.println("输入错误,请重新输入！"); } else { if(userChoice == 1) { System.out.println("请输入您要查找的学生名："); String SName = scan.next(); findBySName(SName); } else if(userChoice == 2) { System.out.println("请输入您要查找的学号："); int SID = scan.nextInt(); findBySID(SID); } } } } static int findByOrder(int number){ //按序号(1~count)返回数组下标id if(number > 0 && number <= count ){ return number - 1; } else return -1; } static void findBySName(String SName){//按姓名查找学生，返回id //***********Begin************ //遍历Studentlist数组中进行查找，输出所有包含SName的图书信息 //如果一个都没找到，请输出"查找失败！" boolean found = false; for(int i = 0; i < count; i++){ if(studentlist[i].getSName().contains(SName)){//留意此处使用的是contains studentlist[i].printInfo(); found = true; } } if(!found) { System.out.println("查找失败！"); } //************End************* } static void findBySID(int SID) {//按学生id名查找学生，返回id //***********Begin************ //遍历Studentlist数组中进行查找，输出所有学生名是SID的图书信息 //如果一个都没找到，请输出"查找失败！" boolean found = false; for(int i = 0; i < count; i++){ if(studentlist[i].getSId()==SID){//留意此处使用的是equals studentlist[i].printInfo(); found = true; } } if(!found) { System.out.println("查找失败！"); } //************End************* } public static void main(String[] args) { run(); } }