Java 获取当前年份值到字符串
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get present year value to string
提问by Frank
I need to get the present year value in string so I did:
我需要在字符串中获取当前年份值，所以我做了：
Calendar now = Calendar.getInstance();
DateFormat date = new SimpleDateFormat("yyyy");
String year = date.format(now);
It works on ubuntu but it's not working on windows 7.
它适用于 ubuntu，但不适用于 Windows 7。
Do you know why? Is there a safer way to do that?
你知道为什么吗？有没有更安全的方法来做到这一点？
Thanks
谢谢
采纳答案by Rohit Jain
You can simple get the year from Calendarinstance using Calendar#get(int field)method:
您可以Calendar使用Calendar#get(int field)方法简单地从实例中获取年份：
Calendar now = Calendar.getInstance();
int year = now.get(Calendar.YEAR);
String yearInString = String.valueOf(year);
回答by ssantos
What about
关于什么
Date currentDate = new Date();
String currentYear = String.valueOf(currentDate.getYear());
回答by sunysen
try
尝试
Calendar now = Calendar.getInstance();
String year = String.valueOf(now.get(Calendar.YEAR));
回答by jdev
You can also do it like this:
你也可以这样做：
String year = String.valueOf(Calendar.getInstance().get(Calendar.YEAR));
回答by aianitro
String thisYear = new SimpleDateFormat("yyyy").format(new Date());
回答by Basil Bourque
Time Zone
时区
Both the question and accepted answer ignore the question of time zone. At the time of a new year, the year number varies depending on your time zone.
问题和接受的答案都忽略了时区问题。在新年的时候，年数会因您所在的时区而异。
Joda-Time
乔达时间
The bundled java.util.Date and .Calendar classes are notoriously troublesome. Avoid them. Use either Joda-Time or the new java.time package in Java 8.
捆绑的 java.util.Date 和 .Calendar 类是出了名的麻烦。避开它们。在 Java 8 中使用 Joda-Time 或新的 java.time 包。
Example in Joda-Time.
Joda-Time 中的示例。
DateTimeZone timeZone = DateTimeZone.forID( "Europe/Paris" );
DateTime dateTime = DateTime.now( timeZone );
int year = dateTime.year().get();
回答by Gemtastic
In Java 8 there's a collection called java.timein which you easily can obtain the current year from your computer's clock.
在 Java 8 中有一个名为的集合java.time，您可以在其中轻松地从计算机的时钟中获取当前年份。
To get the current year as an integer you can simply write:
要将当前年份作为整数，您可以简单地编写：
int thisYear = Year.now().getValue();
To get it as a String:
将其作为字符串获取：
String thisYear = Year.now().toString();
回答by Nandkishor Gokhe
// enter code here
Date date = new Date();
DateFormat format = new SimpleDateFormat("yyyy");
String year = format.format(date);
回答by Rok T.
In Java versions prior Java 8 you could also use java.sql.Date class. Convert to String and substring the year:
在 Java 8 之前的 Java 版本中，您还可以使用 java.sql.Date 类。转换为字符串并将年份子字符串化：
String currentYear = new java.sql.Date(System.currentTimeMillis()).toString().substring(0, 4);
