我有我的主要课程Date.Java
Date.Java确实：
- 设置月份日期和年份，并确保其有效输入
- 确定您输入的月份中的天数
- 确定自您输入之日起已过去的天数
- 确定从您输入的那天起剩余的天数
- 确定年份是否为闰年
我还有一个测试课TestDate.java
- 它要求用户输入并将它们发送到Date.java
我的问题是我只能让程序打印用户输入的日期。我如何调用其他方法并让它们打印出他们正在返回的内容？
Date.java ：
public class Date
{
int Day;
int Month;
int Year;
int numberOfDays;
int daysPassed;
int daysRemaining;
int M;
int D;
int Y;
public Date (int Day, int Month, int Year)
{
setDate(Month, Day, Year);
}
public void setDate (int Day, int Month, int Year)
{
setMonth(Month);
setDay(Day);
setYear(Year);
}
//-------------------SETTERS----------------------
public void setMonth(int Month)
{
M = ((Month>0&&Month<13) ?Month:1); //conditional statement that checks to see if the Month is valid
}
public void setDay(int Day)
{
D = ((Day>=1&&Day<=365) ?Day:1); //conditional statement that checks to see if the day is valid
}
public void setYear(int Year)
{
Y = ((Year>=1000&&Year<=9999) ?Year:1900); //conditional statement that checks to see if the Year is valid
}
//-------------------GETTERS----------------------
public int getMonth()
{
return M;
}
public int getDay()
{
return D;
}
public int getYear()
{
return Y;
}
public String toString()
{
return String.format("%d-%d-%d", getMonth(), getDay(), getYear());
}
public static boolean isLeapYear(int getYear)
{
if (getYear%4 == 0)
return true;
else
return false;
}
public int daysOfMonth(int getMonth, int numberOfDays, boolean isLeapYear)
{
if (getMonth==1) //jan
numberOfDays = 31;
//---------------------------------------Feb
if (isLeapYear == true) //feb
{
if (getMonth==2)
numberOfDays = 29;
}
if (isLeapYear == false) //feb
{
if (getMonth==2)
numberOfDays = 28;
}
//---------------------------------------Feb
if (getMonth==3) //march
numberOfDays = 31;
if (getMonth==4) //april
numberOfDays = 30;
if (getMonth==5) //may
numberOfDays = 31;
if (getMonth==6) //june
numberOfDays = 30;
if (getMonth==7) //july
numberOfDays = 31;
if (getMonth==8) //august
numberOfDays = 31;
if (getMonth==9) //sept
numberOfDays = 30;
if (getMonth==10) //oct
numberOfDays = 31;
if (getMonth==11) //nov
numberOfDays = 30;
if (getMonth==12) //dec
numberOfDays = 31;
return numberOfDays;
}
public int daysPassedInYear(int getMonth, int Day, int getDay, int numberOfDays, boolean isLeapYear)
{
if (getMonth==1)
Day = getDay-31;
if (isLeapYear = true)
{
if (getMonth==2)
daysPassed = (numberOfDays-getDay)-60;
if (getMonth==3)
daysPassed = (numberOfDays-getDay)-91;
if (getMonth==4)
daysPassed = (numberOfDays-getDay)-121;
if (getMonth==5)
daysPassed = (numberOfDays-getDay)-152;
if (getMonth==6)
daysPassed = (numberOfDays-getDay)-182;
if (getMonth==7)
daysPassed = (numberOfDays-getDay)-213;
if (getMonth==8)
daysPassed = (numberOfDays-getDay)-244;
if (getMonth==9)
daysPassed = (numberOfDays-getDay)-274;
if (getMonth==10)
daysPassed = (numberOfDays-getDay)-305;
if (getMonth==11)
daysPassed = (numberOfDays-getDay)-335;
if (getMonth==12)
daysPassed = (numberOfDays-getDay)-366;
}
if (isLeapYear = false)
{
if (getMonth==2)
daysPassed = (numberOfDays-getDay)-59;
if (getMonth==3)
daysPassed = (numberOfDays-getDay)-90;
if (getMonth==4)
daysPassed = (numberOfDays-getDay)-120;
if (getMonth==5)
daysPassed = (numberOfDays-getDay)-151;
if (getMonth==6)
daysPassed = (numberOfDays-getDay)-181;
if (getMonth==7)
daysPassed = (numberOfDays-getDay)-212;
if (getMonth==8)
daysPassed = (numberOfDays-getDay)-243;
if (getMonth==9)
daysPassed = (numberOfDays-getDay)-273;
if (getMonth==10)
daysPassed = (numberOfDays-getDay)-304;
if (getMonth==11)
daysPassed = (numberOfDays-getDay)-334;
if (getMonth==12)
daysPassed = (numberOfDays-getDay)-365;
}
return daysPassed;
}
public int daysRemainingInYear(int dayspassed, boolean isLeapYear, int daysRemaining)
{
if (isLeapYear = true)
daysRemaining = (366 - dayspassed);
if (isLeapYear = false)
daysRemaining = (365 - dayspassed);
return daysRemaining;
}
}
TestDate.java ：
import javax.swing.JOptionPane;
public class TestDate {
public static void main(String[] args) {
int month =Integer.parseInt(JOptionPane.showInputDialog("What month do you want(in number form ex. Jan = 1?"));
int day =Integer.parseInt(JOptionPane.showInputDialog("What day do you want within the month?"));
int year =Integer.parseInt(JOptionPane.showInputDialog("What year do you want"));
Date setDateObject = new Date(month, day, year);
System.out.println(setDateObject.toString());
}
}
答案 0 :(得分：1)
您可以调用Date对象上的其他方法并打印它们的返回值。
Date date = new Date(1, 2, 2003);
System.out.println(date.getYear());
System.out.println(date.isLeapYear());
使用参数的方式很奇怪。像getMonth，numberOfDays，isLeapYear这样的参数用于将信息传递给函数。 getMonth和isLeapYear对于函数正常工作至关重要，但numberOfDays不是必需的。您可以像这样声明函数：
public int daysOfMonth(int getMonth, boolean isLeapYear)
{
if (getMonth==1) //jan
return 31;
//---------------------------------------Feb
if (isLeapYear && getMonth==2)
return 29;
}
if (/* !isLeapYear && */ getMonth==2)
return 29;
}
//---------------------------------------Feb
if (getMonth==3) //march
return 31;
if (getMonth==4) //april
return 30;
if (getMonth==5) //may
return 31;
if (getMonth==6) //june
return 30;
if (getMonth==7) //july
return 31;
if (getMonth==8) //august
return 31;
if (getMonth==9) //sept
return 30;
if (getMonth==10) //oct
return 31;
if (getMonth==11) //nov
return 30;
if (getMonth==12) //dec
return 31;
return -1; // error
}
然后你可以像这样创建一个日期并调用daysOfMonth函数。
Date date = (2, 29, 2004);
System.out.println(date);
System.out.println("Is this date a leap year? " + date.isLeapYear());
System.out.println("How many days in this month? " + date.daysOfMonth(date.getMonth(), date.isLeapYear());
答案 1 :(得分：0)
待办事项
System.out.println(yourobject.yourMethod());
这将打印您的方法yourMethod()返回的内容。
您还可以在任何功能中打印值。
public void yourMethod(){
System.out.println(yourAtrribute);
}
对于您的课程，您可以执行以下操作：
Date setDateObject = new Date(month, day, year);
//do other stuffs here
System.out.println(setDateObject.getYear());
打印年 getYear（）方法将返回。