我正在我的 Java 课上做家庭作业。我得到了大部分内容，除了关于经过时间的部分。我们必须使用方法。这是我的作业和代码。
“您刚刚被一家公司雇用来完成每周的工资单。您每天必须执行的一项功能是检查员工考勤卡并计算他们“打卡”和“打卡”之间经过的时间。你有时还必须将小时转换为分钟，将天转换为小时，将分钟转换为小时，将小时转换为天。由于您刚刚完成了第一堂编程课程，因此您决定编写一个程序来帮助您完成工作。
您决定按以下方式构建您的程序。主要功能只是一个菜单，用户可以从中选择以获取他们想要的信息。菜单上的每个选项都会调用特定的方法来解决任务和/或输出答案。
对于这个程序，您可以假设所有经过的时间都在一天之内，但其他时间可能会更远。请务必提供足够的测试数据来证明您的解决方案是正确的。（为每个转换显示至少一个输出[对于选项#5 可能有几个]）。"
import java.util.*;
public class Prog671A
{
public static void hoursToMinutes()
{
Scanner input = new Scanner (System.in);
System.out.print("Enter hour(s): ");
int hours = input.nextInt();
System.out.println(hours + " * 60 = " + (hours * 60) + " minutes.");
System.out.println("");
}
public static void daysToHours()
{
Scanner input = new Scanner (System.in);
System.out.print("Enter day(s): ");
int days = input.nextInt();
System.out.println(days + " * 24 = " + (days * 24) + " hours.");
System.out.println("");
}
public static void minutesToHours()
{
Scanner input = new Scanner (System.in);
System.out.print("Enter minute(s): ");
int minutes = input.nextInt();
System.out.println(minutes + " / 60 = " + ((double)minutes / 60) + " hours.");
System.out.println("");
}
public static void hoursToDays()
{
Scanner input = new Scanner (System.in);
System.out.print("Enter hour(s): ");
int hours = input.nextInt();
System.out.println(hours + " / 24 = " + ((double)hours / 24) + " days.");
System.out.println("");
}
public static void elapsedTime()
{
Scanner input = new Scanner (System.in);
System.out.print("Enter the beginning hour: ");
int startingHour = input.nextInt();
System.out.print("Enter the beginning minute(s): ");
int startingMinutes = input.nextInt();
System.out.print("Enter AM/PM: ");
String startingAmOrPm = input.nextLine();
System.out.print("Enter the ending hour: ");
int endingHour = input.nextInt();
System.out.print("Enter the ending minute(s): ");
int endingMinutes = input.nextInt();
System.out.print("Enter AM/PM: ");
String endingAmOrPm = input.nextLine();
System.out.println("");
System.out.println("The elapsed time is: " + );
}
public static void main (String args [])
{
int x = 1;
while (x == 1) {
Scanner input = new Scanner (System.in);
System.out.println("Conversion Tasks");
System.out.println("\t1. Hours -> Minutes");
System.out.println("\t2. Days -> Hours");
System.out.println("\t3. Minutes -> Hours");
System.out.println("\t4. Hours -> Days");
System.out.println("\t5. Elapsed time between two times");
System.out.println("\t6. Exit");
System.out.print("Enter a number: ");
int menu = input.nextInt();
System.out.println("");
if (menu == 1)
hoursToMinutes();
if (menu == 2)
daysToHours();
if (menu == 3)
minutesToHours();
if (menu == 4)
hoursToDays();
if (menu == 5)
elapsedTime();
if (menu == 6)
x = 0;
}
}
}
我只是在这里需要帮助
public static void elapsedTime()
{
Scanner input = new Scanner (System.in);
System.out.print("Enter the beginning hour: ");
int startingHour = input.nextInt();
System.out.print("Enter the beginning minute(s): ");
int startingMinutes = input.nextInt();
System.out.print("Enter AM/PM: ");
String startingAmOrPm = input.nextLine();
System.out.print("Enter the ending hour: ");
int endingHour = input.nextInt();
System.out.print("Enter the ending minute(s): ");
int endingMinutes = input.nextInt();
System.out.print("Enter AM/PM: ");
String endingAmOrPm = input.nextLine();
System.out.println("");
System.out.println("The elapsed time is: " + );
}