英文:
Else-if statement in Java is not working, what am I doing wrong?
问题
以下是您提供的代码的翻译部分：
import java.util.Scanner;
public class DaysOfWeek {
public static void main(String[] args) {
String day;
System.out.print("输入星期几：");
Scanner sc = new Scanner(System.in);
day = sc.next();
if (day.equals("星期一")) {
System.out.println("听起来有人有一种星期一的感觉！");
} else if (day.equals("星期三")) {
System.out.println("已经是周三了！肚脐！");
} else if (day.equals("星期五")) {
System.out.println("终于，星期五了！");
} else {
System.out.println("这是一周中的另一天。");
}
}
}
英文:
So I'm trying to do a simple code with an if-else-if statement, but it isn't working. I have only done if-else before and I am getting confused. Here is the code. Why isn't it accepting my else-if?
import java.util.Scanner;
public class DaysOfWeek {
public static void main (String[]args) {
Double day;
System.out.print("Enter the day: ");
Scanner sc = new Scanner(System.in);
day = sc.nextDouble();
if (day.equals("Monday"));
{
System.out.println("Sounds like someone has a case of the Mondays!");
}
else if (day.equals("Wednesday"));
{
System.out.println("It's hump day! El ombligo!");
}
else if (day.equals("Friday"));
{
System.out.println("Finally. It's Friday!");
}
else {System.out.println("It's another day of the week.");}
}}
答案1
得分: 1
-
如果您希望任何比较按照编写的方式起作用，您需要使用
String day和sc.nextLine()。 -
if和else if行不应使用;- 如果您这样编写更容易看清楚
if (condition) {
}
英文:
-
You want
String dayandsc.nextLine()if you want any comparison to work as written -
if and else if lines should not use
;- Easier to see if you write likeif (condition) { }
答案2
得分: 0
以下是您要翻译的内容：
感谢大家迅速指出我在 if-else-if 代码行末尾的分号。还要感谢大家注意到字符串与双精度的问题，我知道这一点，但由于我对 if-else-if 行的困惑感到非常沮丧，所以忽略了它。一旦我纠正了这两个问题，它就按照我预期的方式工作了。
为了进行正确比较，将 String day 和 sc.nextLine() 替换了 Double。
if-else-if 行末尾的分号被移除。
我还添加了一点内容，以便可以针对输入的不同日期选项进行处理。
import java.util.Scanner;
public class DaysOfWeek {
public static void main(String[] args) {
String day;
System.out.print("请输入日期: ");
Scanner sc = new Scanner(System.in);
day = sc.nextLine();
if (day.equals("星期一") || day.equals("一") || day.equals("周一") || day.equals("Mon"))
{
System.out.println("听起来有人被周一绊倒了！");
}
else if (day.equals("星期三") || day.equals("三") || day.equals("周三") || day.equals("Wed"))
{
System.out.println("已经是周三了，一周的中点！");
}
else if (day.equals("星期五") || day.equals("五") || day.equals("周五") || day.equals("Fri"))
{
System.out.println("终于，周五到了！");
}
else {
System.out.println("这是一周中的另一天。");
}
}
}
英文:
Thank-you everyone for quickly pointing out my semicolons at the end of my if-else-if lines. Also, thank-you for the catch on the string as opposed to double, I knew this part but had overlooked it because I was too frustrated with my confusion of the if-else-if lines. Once I corrected the two issues it worked exactly how I'd intended.
String day and sc.nextLine() replaced Double in order to make a proper comparison.
; was removed from the ends of my if-else-if lines.
I also added a little bit so that it would take various options for days entered
import java.util.Scanner;
public class DaysOfWeek{
public static void main (String[]args) {
String day;
System.out.print("Enter the day: ");
Scanner sc = new Scanner(System.in);
day = sc.nextLine();
if (day.equals("Monday")||day.equals("M")||day.equals("Mon.")||day.equals("Mon"))
{
System.out.println("Sounds like someone has a case of the Mondays!");
}
else if (day.equals("Wednesday")||day.equals("W")||day.equals("Wed.")||day.equals("Wed"))
{
System.out.println("It's hump day! El ombligo!");
}
else if (day.equals("Friday")||day.equals("F")||day.equals("Fri.")||day.equals("Fri"))
{
System.out.println("Finally. It's Friday!");
}
else {System.out.println("It's another day of the week.");}
}}
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