I was given a little task to complete where a user would be asked to input either a month or the numerical equivalent and it would return the numerical value of the entered month, or the month corresponding to the inputted numerical value. The constraints are as follows: - It must not contain a GUI of any kind - I have to use the BufferedReader for input - I have to use at least one Switch statement
If anyone has any ideas, it would be greatly appreciated. My code so far is as follows:
/**
* Month task
*
* @author Dan Foad
* @version 0.01
*/
import java.io.IOException;
import java.io.BufferedReader;
import java.io.InputStreamReader;
public class Months {
public static void main(String []args) throws IOException {
int iInput;
boolean isParseable;
String szInput;
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
System.out.println("Please type either the number of the month, or the month itself to convert.");
System.out.print("> ");
szInput = br.readLine();
try {
Integer.valueOf(szInput);
isParseable = true;
}
catch(Exception e) {
isParseable = false;
}
if (isParseable) {
iInput = Integer.valueOf(szInput);
System.out.println(numberToMonth(iInput));
}
else {
szInput = szInput.toLowerCase();
System.out.println(monthToNumber(szInput));
}
return;
}
public static String numberToMonth(int iMonth) {
String MonthReturn;
switch(iMonth) {
case (1): MonthReturn = "January"; break;
case (2): MonthReturn = "February"; break;
case (3): MonthReturn = "March"; break;
case (4): MonthReturn = "April"; break;
case (5): MonthReturn = "May"; break;
case (6): MonthReturn = "June"; break;
case (7): MonthReturn = "July"; break;
case (8): MonthReturn = "August"; break;
case (9): MonthReturn = "September"; break;
case (10): MonthReturn = "October"; break;
case (11): MonthReturn = "November"; break;
case (12): MonthReturn = "December"; break;
default: MonthReturn = "0"; break;
}
return MonthReturn;
}
public static int monthToNumber(String szMonth) {
int MonthReturn;
switch(szMonth) {
case ("january"): MonthReturn = 1; break;
case ("february"): MonthReturn = 2; break;
case ("march"): MonthReturn = 3; break;
case ("april"): MonthReturn = 4; break;
case ("may"): MonthReturn = 5; break;
case ("june"): MonthReturn = 6; break;
case ("july"): MonthReturn = 7; break;
case ("august"): MonthReturn = 8; break;
case ("september"): MonthReturn = 9; break;
case ("october"): MonthReturn = 10; break;
case ("november"): MonthReturn = 11; break;
case ("december"): MonthReturn = 12; break;
default: MonthReturn = 0; break;
}
return MonthReturn;
}
}
You can also do this:
private static final String[] monthNames = {"January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"};
public static String numberToMonth(int iMonth) {
return (iMonth < 12 && iMonth > 0) ? monthNames[iMonth - 1] : "None";
}
您可以将字符串“ 1”,“ 2”,“ 3”,...,“ 12”添加到monthToNumber方法中,这样就不必使用String.valueOf将用户输入转换为Integer。
How about this?
import java.io.IOException;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.Calendar;
import static java.util.Calendar.APRIL;
import static java.util.Calendar.AUGUST;
import static java.util.Calendar.DECEMBER;
import static java.util.Calendar.FEBRUARY;
import static java.util.Calendar.JANUARY;
import static java.util.Calendar.JULY;
import static java.util.Calendar.JUNE;
import static java.util.Calendar.MARCH;
import static java.util.Calendar.MAY;
import static java.util.Calendar.NOVEMBER;
import static java.util.Calendar.OCTOBER;
import static java.util.Calendar.SEPTEMBER;
public class Months {
public static void main(String []args) throws IOException {
Integer iInput = null;
String szInput = null;
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
System.out.println("Please type either the number of the month, or the month itself to convert.");
System.out.print("> ");
szInput = br.readLine();
boolean wasInt = false;
try {
iInput = Integer.valueOf(szInput);
System.out.println(numberToMonth(iInput));
wasInt = true;
}
catch(Exception e) {
}
if (! wasInt) {
szInput = szInput.toLowerCase();
System.out.println(monthToNumber(szInput));
}
return;
}
public static String numberToMonth(int iMonth) {
switch(iMonth-1) {
case (JANUARY): return "January";
case (FEBRUARY): return "February";
case (MARCH): return "March";
case (APRIL): return "April";
case (MAY): return "May";
case (JUNE): return "June";
case (JULY): return "July";
case (AUGUST): return "August";
case (SEPTEMBER): return "September";
case (OCTOBER): return "October";
case (NOVEMBER): return "November";
case (DECEMBER): return "December";
}
return "Unknown";
}
public static int monthToNumber(String szMonth) {
if (szMonth == null) {
return 0;
}
switch(szMonth.toLowerCase()) {
case ("january"): return 1 + JANUARY;
case ("february"): return 1 + FEBRUARY;
case ("march"): return 1 + MARCH;
case ("april"): return 1 + APRIL;
case ("may"): return 1 + MAY;
case ("june"): return 1 + JUNE;
case ("july"): return 1 + JULY;
case ("august"): return 1 + AUGUST;
case ("september"): return 1 + SEPTEMBER;
case ("october"): return 1 + OCTOBER;
case ("november"): return 1 + NOVEMBER;
case ("december"): return 1 + DECEMBER;
}
return 0;
}
}
是的,从数字转月份方法中,您可以按时间顺序创建一个带有月份名称的String数组,然后只需在给定输入值的索引处减去1即可获取字符串。
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