Java 我能'；我不能让我的程序打印闰年

我试图让它打印出我的程序的最后一种方法似乎无法让它这样做。我不知道该怎么办。我在一个在线课堂上，所以没有人可以问我。我的老师花了三天的时间来回答

import java.util.Scanner;

public class LeapYear {

public static void main(String[] args) {
displayInstructions();
int year = getYear();
isLeap(year);
}

public static void displayInstructions() {
    System.out.println("This program asks you to enter a year as a 4 digit number. The output will indicate whether the year you entered is a leap year.");
}

public static int getYear() {
Scanner reader = new Scanner(System.in);
System.out.println("Enter a year: ");
int year = reader.nextInt();
return year;
}

public static boolean isLeap(boolean year) {
    boolean isLeapYear = false;
    if (year % 4 == 0 && year != 100) {
        isLeap = true;

    }
    else {
        isLeap false;
    }



}
public static void displayResuls( boolean isLeap, boolean year) {
  if (isLeap)
  {
    System.out.println("Year" +year+" is a Leap Year.");
  }

  else {
  System.out.println("Year" +year+" is not a Leap Year");

  }

    }
}

---

您从不调用

显示结果（isLeap（year），year）

---

编辑：您对displayResults的声明也是错误的，它应该是

int year

而不是

boolean year

您的

isLeap

函数应该如下所示：

public static boolean isLeap(int year) {
    boolean isLeapYear = false;
    if ((year % 4 == 0) && ((year % 100 != 0) || (year % 400 == 0))) {
        isLeapYear = true;
    } else {
        isLeapYear = false;
    }
    return isLeapYear;
}

我认为主要的错误是状况不佳。它比你的复杂。 正确的一点：

(year % 4 == 0) && ((year % 100 != 0) || (year % 400 == 0))

---

例如，2000-leap，但2100-not。

这是您重写的代码。正如其他人所说，您从未调用过

displaysresults

，并且有一些小的打字错误。继续编码；）

---

对您的程序进行了一些更改，效果良好

public static void main(String[] args) {
        displayInstructions();
        int year = getYear();
        System.out.println("Entered Year is "+isLeap(year));
    }

    public static void displayInstructions() {
        System.out.println("This program asks you to enter a year as a 4 digit number. "
                + "The output will indicate whether the year you entered is a leap year.");
    }

    public static int getYear() {
        Scanner reader = new Scanner(System.in);
        System.out.println("Enter a year: ");
        int year = reader.nextInt();
        return year;
    }

    public static boolean isLeap(int year) {
        boolean isLeapYear = false;
        if (year%4 == 0 && year != 100) {
            return isLeapYear = true;

        }
        else {
            return isLeapYear = false;
        }
    }

---

“年”应该是什么？您将其声明为“int”，然后尝试将其作为布尔值传递，然后再次将其作为int进行处理…？：-0

public static void main(String[] args) {
        displayInstructions();
        int year = getYear();
        System.out.println("Entered Year is "+isLeap(year));
    }

    public static void displayInstructions() {
        System.out.println("This program asks you to enter a year as a 4 digit number. "
                + "The output will indicate whether the year you entered is a leap year.");
    }

    public static int getYear() {
        Scanner reader = new Scanner(System.in);
        System.out.println("Enter a year: ");
        int year = reader.nextInt();
        return year;
    }

    public static boolean isLeap(int year) {
        boolean isLeapYear = false;
        if (year%4 == 0 && year != 100) {
            return isLeapYear = true;

        }
        else {
            return isLeapYear = false;
        }
    }