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我修復了我的setMonthnum方法，但現在我的輸入將設置月份號爲0,13等基於我的輸入。我需要知道如何去再次詢問輸入，而不是將我的Monthnum設置爲不正確的輸入。如果您有任何建議來簡化我的代碼，請隨時聲明它們！我的代碼如下：創建構造函數和方法與月
import java.util.Scanner;
public class whichMonth {
public static void main(String args[]){
Scanner input = new Scanner(System.in);
System.out.println("Please enter the month name or number: ");
int monthNumber = input.nextInt();
//set up variable access to the class
AnyMonth inputMonthNumber = new AnyMonth();
// set the month number from user input
inputMonthNumber.setMonthnum.input.nextInt(monthNumber);
// get the month name from user input number
String monthName = inputMonthNumber.getMonthName(monthNumber);
}
}
class AnyMonth {
int Monthnum;
String monthName;
public AnyMonth() {
Monthnum = 1;
}
public AnyMonth(int currentMonthNumber) {
Monthnum = currentMonthNumber;
switch(currentMonthNumber) {
case 1:
Monthnum = 1;
monthName = "January";
System.out.println("January");
break;
case 2:
Monthnum = 2;
monthName = "February";
System.out.println("February");
break;
case 3:
Monthnum = 3;
monthName = "March";
System.out.println("March");
break;
case 4:
Monthnum = 4;
monthName = "April";
System.out.println("April");
break;
case 5:
Monthnum = 5;
monthName = "May";
System.out.println("May");
break;
case 6:
Monthnum = 6;
monthName = "June";
System.out.println("June");
break;
case 7:
Monthnum = 7;
monthName = "July";
System.out.println("July");
break;
case 8:
Monthnum = 8;
monthName = "August";
System.out.println("August");
break;
case 9:
Monthnum = 9;
monthName = "September";
System.out.println("September");
break;
case 10:
Monthnum = 10;
monthName = "October";
System.out.println("October");
break;
case 11:
Monthnum = 11;
monthName = "November";
System.out.println("November");
break;
case 12:
Monthnum = 12;
monthName = "December";
System.out.println("December");
break;
default:
Monthnum = 1;
monthName = "January";
}
}
public AnyMonth(String userMonthName) {
switch(userMonthName) {
case "January":
Monthnum = 1;
monthName = "January";
System.out.println("January");
break;
case "February":
Monthnum = 2;
monthName = "February";
System.out.println("February");
break;
case "March":
Monthnum = 3;
monthName = "March";
System.out.println("March");
break;
case "April":
Monthnum = 4;
monthName = "April";
System.out.println("April");
break;
case "May":
Monthnum = 5;
monthName = "May";
System.out.println("May");
break;
case "June":
Monthnum = 6;
monthName = "June";
System.out.println("June");
break;
case "July":
Monthnum = 7;
monthName = "July";
System.out.println("July");
break;
case "August":
Monthnum = 8;
monthName = "August";
System.out.println("August");
break;
case "September":
Monthnum = 9;
monthName = "September";
System.out.println("September");
break;
case "October":
Monthnum = 10;
monthName = "October";
System.out.println("October");
break;
case "November":
Monthnum = 11;
monthName = "November";
System.out.println("November");
break;
case "December":
Monthnum = 12;
monthName = "December";
System.out.println("December");
break;
default:
Monthnum = 1;
monthName = "January";
}
}
public void setMonthnum (int userMonth) {
Monthnum = userMonth;
if (userMonth < 1 || userMonth > 12){
System.out.println("Invalid input");
this.Monthnum = userMonth;
}
}
public int getMonthnum(int currentMonthNumber) {
Monthnum = currentMonthNumber;
return currentMonthNumber;
}
public String getMonthName(int currentMonthName) {
Monthnum = currentMonthName;
// use swtich-case here instead, default case should return 1/Jan
switch(currentMonthName) {
case 1:
monthName = "January";
break;
case 2:
monthName = "February";;
break;
case 3:
monthName = "March";
break;
case 4:
monthName = "April";
break;
case 5:
monthName = "May";
break;
case 6:
monthName = "June";
break;
case 7:
monthName = "July";
break;
case 8:
monthName = "August";
break;
case 9:
monthName = "September";
break;
case 10:
monthName = "October";
break;
case 11:
monthName = "November";
break;
case 12:
monthName = "December";
break;
default:
monthName = "January";
}
return monthName;
}
public String toString(String monthNameToString){
monthName = monthNameToString;
return monthNameToString;
}
public boolean equals(int month) {
if (Monthnum == month) {
return true;
}
else {
return false;
}
}
public boolean greaterThan(int month) {
if (Monthnum > month) {
return true;
}
else {
return false;
}
}
public boolean lessThan(int month) {
if (Monthnum < month) {
return true;
}
else {
return false;
}
}
}
我建議你在你的'setMonthnum'方法拋出一個異常，而不是簡單的'sout'調用，如果條件錯了 – Andrew
請解釋一下嗎？ – simplest
當你向你的方法傳送了不正確的參數時，你將不會處理錯誤的數據，但是你可能會拋出，例如，'IllegalArgumentException' – Andrew