Java: 我在 Main 方法中的语句正在打印，但在我的其他方法中没有

Question

这是代码。它是日历程序的骨架，可以查找月份和年份。我不确定为什么我们的老师想要命令行参数位，所以暂时忽略它，除非它影响我的代码。在页面底部，我将显示输出。当我收到输出时，尽管在该方法中要求用户输入，但第二种方法（处理月份）不会显示任何内容。我希望我的程序首先询问用户想要查看哪一年，然后是月份。我确定我犯了一些明显的错误，但有人可以指出正确的方向吗？

package calendardisplay;

/**
*
* @author TheDancingPope
*/
import java.util.Scanner;

public class CalendarDisplay 

{
    static Scanner scan = new Scanner(System.in);    

    public static final String MONTH_NAME[] = {"","Jan","Feb","Mar", 
                                               "Apr", "May","June", 
                                                "Jul", "Aug", "Sep", 
                                                "Oct", "Nov", "Dec"};
    public static void outputMonthName(int month)
    {
    System.out.println(MONTH_NAME[month]);
    }

public static void main(String[] args) 
{

        for (int i = 1; i < MONTH_NAME.length; i++)
        {
            System.out.println("Month number:" + i + 
                "\nis Month Name:\n" + MONTH_NAME[i]);
        }





        //Processes command line argument
        System.out.println("Number of command line arguments: " + args.length);

        for(int i = 0; i < args.length; i++)
        {
            System.out.println("Argument " + i + ": " + args[i]);
        }
    //This next section handles the leap year scanner. Based on the 
    //calculation below, paired with the user input, I will be able to tell
    //whether or not they picked a leap year.

    System.out.println("Please choose a year");
    int yearChosen = scan.nextInt();

    boolean isLeapYear = ((yearChosen % 4 == 0) && (yearChosen % 100 !=0)
            || (yearChosen % 400 == 0));
    System.out.println("You chose\n" + yearChosen);
        if (isLeapYear)
        {
            System.out.println (yearChosen + "\n is a leap year.");
        } else
        System.out.println(yearChosen + "\n is not a leap year.");

}
//This is where the months are processed. In here, I will sort through
//the months chosen via the user, and based on their month, I will bring up
//a formatted calendar for that month, with the correct amount of days in it.
public static int monthTime()
{
    System.out.println("Please chose a month:\n");
    int monthChosen = scan.nextInt();
    String monthString;
    switch (monthChosen)
        {
        case 1:  monthString = "January";
                 break;
        case 2:  monthString = "February";
                 break;
        case 3:  monthString = "March";
                 break;
        case 4:  monthString = "April";
                 break;
        case 5:  monthString = "May";
                 break;
        case 6:  monthString = "June";
                 break;
        case 7:  monthString = "July";
                 break;
        case 8:  monthString = "August";
                 break;
        case 9:  monthString = "September";
                 break;
        case 10: monthString = "October";
                 break;
        case 11: monthString = "November";
                 break;
        case 12: monthString = "December";
                 break;
        default: monthString = "Invalid month";

        break;
        }
    System.out.println("You chose:\n" + monthString);
    return monthChosen;
    }
}

当我运行这样做时，我在我的代码下面的小 netbeans 框中得到以下输出：

run:
Month number:1
is Month Name:
Jan
Month number:2
is Month Name:
Feb
Month number:3
is Month Name:
Mar
Month number:4
is Month Name:
Apr
Month number:5
is Month Name:
May
Month number:6
is Month Name:
June
Month number:7
is Month Name:
Jul
Month number:8
is Month Name:
Aug
Month number:9
is Month Name:
Sep
Month number:10
is Month Name:
Oct
Month number:11
is Month Name:
Nov
Month number:12
is Month Name:
Dec
Number of command line arguments: 0
Please choose a year
2015
You chose
2015
2015
is not a leap year.
BUILD SUCCESSFUL (total time: 5 seconds)

它提示我作为用户输入一年，而不是一个月。我已经提示程序以该方法初始化一个 int 扫描仪，但我什么也没得到。我做错了什么？

Answer 1

您的 monthTime() 方法从未被调用。您可能想在 main 方法的末尾调用它。

Answer 2

您没有在您的 main 中调用函数 monthTime()，尝试在您的 yearChosen 之后调用它？

Answer 3

默认情况下唯一的方法运行是 Main 方法。要调用其他方法，您必须在 Main 方法中包含对它们的调用。

Java: 我在 Main 方法中的语句正在打印，但在我的其他方法中没有

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