java - 输入和循环

Question

我正在尝试按照图片所示进行操作:

这是我的代码:

import java.util.Scanner;
public class IcsProject
{

 public static void main(String [] args)
{
    Scanner keyboard= new Scanner (System.in);
    int menuNum,ID,semNum,semCode,semCourses;

do{
        System.out.println("Please Enter your Choice from the menu:");
        System.out.println("1. Enter Student Sanscript");
        System.out.println("2. Display Transcript Summary");
        System.out.println("3. Read Student Franscript from a File");
        System.out.println("4. Write Transcript Summary to a File");
        System.out.println("5. Exit");

        menuNum = keyboard.nextInt();

        if (menuNum == 2 || menuNum == 3 || menuNum == 4)
            System.out.println("Not working");


    } while (menuNum > 1 && menuNum < 5);

//// Option 1: Enter student transcript


        if (menuNum ==  1)
            System.out.println("Please enter your student's FIRST and LAST name:");
            String stuName = keyboard.nextLine();
            System.out.println("Please enter the ID number for " + stuName);
            ID = keyboard.nextInt();
            System.out.println("Please enter the number of semesters");
            semNum = keyboard.nextInt();
            for(int i=1 ; i < semNum ; i++)
            {System.out.println("Please enter semester code for semester n# " + semNum);
            semCode = keyboard.nextInt();
            System.out.println("Please enter the number of courses taken in " + semCode );
            semCourses = keyboard.nextInt();}
            System.out.println("Enter course code, credit hours, and letter grade ")

 ///I stopped here 
}

• 我必须从学期代码开始使用数组吗？请给我举个例子。
• 输入所有值后，程序应再次显示菜单，以便我可以从中进行选择。如何做到这一点？
• 我在第一个问题“输入学生的名字和姓氏”时遇到问题程序会跳过它并转到下一个问题。我的 keyboard.nextLine();
是否有错误

Answer 1

我将使用一个对象列表，其中包含您要记录的所有字段。

举个例子，就用google吧。

http://www.google.com/search?q=java+list+examples 2790 万条结果

http://www.google.com/search?q=java+object+examples 1800 万个结果。

http://www.google.com/search?q=java+array+examples 1500 万个结果。