blocks|key|1741463|text|int+year+=+Calendar.getInstance().get(Calendar.YEAR);|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1741464|不确定这是否符合不设置新日历的条件？(为什么反对这样做？)|unstyled|1741465|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|J|8|@]|9|@]|A|$]]|$1|G|3|-4|5|F|7|K|8|@]|9|@]|A|$]]]|H|$]]

<pre><code>int year = Calendar.getInstance().get(Calendar.YEAR);
</code></pre>

Not sure if this meets with the criteria of not setting up a new Calendar? (Why the opposition to doing so?)

blocks|key|1526771|text|使用Java8的time+API+(假设您很乐意获得系统默认时区的年份)，您可以使用the+Year::now+method|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1526772|int+year+=+Year.now().getValue();|code-block|syntax|javascript|1526773|entityMap|0|LINK|mutability|MUTABLE|url|https://docs.oracle.com/javase/8/docs/api/java/time/Year.html#now--^0|1A|9|16|K|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@$9|V|A|W|1|X]]|E|$]]|$1|F|3|G|5|H|7|Y|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Z|8|@]|D|@]|E|$]]]|L|$M|$5|N|O|P|E|$Q|R]]]]

Using Java 8's time API (assuming you are happy to get the year in your system's default time zone), you could use <a href="https://docs.oracle.com/javase/8/docs/api/java/time/Year.html#now--" rel="noreferrer">the <code>Year::now</code> method</a>:

<pre><code>int year = Year.now().getValue();
</code></pre>

blocks|key|1741562|text|最简单的(使用Calendar，对不起)是：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1741563|+int+year+=+Calendar.getInstance().get(Calendar.YEAR);|code-block|syntax|javascript|1741564|除了Joda+Time，还有新的Date+and+Time+API+JSR|offset|length|1741565|entityMap|0|LINK|mutability|MUTABLE|url|http://joda-time.sourceforge.net/|1|https://jsr-310.dev.java.net/^0|0|0|2|9|0|G|L|1|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|W|8|@]|9|@$I|X|J|Y|1|Z]|$I|10|J|11|1|12]]|A|$]]|$1|K|3|-4|5|6|7|13|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|R]]|S|$5|N|O|P|A|$Q|T]]]]

This simplest (using Calendar, sorry) is:

<pre><code> int year = Calendar.getInstance().get(Calendar.YEAR);
</code></pre>

There is also the new <a href="https://jsr-310.dev.java.net/" rel="noreferrer">Date and Time API JSR</a>, as well as <a href="http://joda-time.sourceforge.net/" rel="noreferrer">Joda Time</a>

blocks|key|1741837|text|您还可以使用java.time.YearMonth中的两个方法(从Java8开始)：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1741838|import+java.time.YearMonth;
...
int+year+=+YearMonth.now().getYear();
int+month+=+YearMonth.now().getMonthValue();|code-block|syntax|javascript|1741839|entityMap^0|6|J|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

You can also use 2 methods from <code>java.time.YearMonth</code>( Since Java 8 ):

<pre><code>import java.time.YearMonth;
...
int year = YearMonth.now().getYear();
int month = YearMonth.now().getMonthValue();
</code></pre>

blocks|key|1741520|text|最简单的方法是从Calendar获取年份。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1741521|//+year+is+stored+as+a+static+member
int+year+=+Calendar.getInstance().get(Calendar.YEAR);|code-block|syntax|javascript|1741522|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

The easiest way is to get the year from Calendar.

<pre><code>// year is stored as a static member
int year = Calendar.getInstance().get(Calendar.YEAR);
</code></pre>

blocks|key|1741686|text|如果您想要任何date对象的年份，我使用了以下方法：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1741687|public+static+int+getYearFromDate(Date+date)+{
++++int+result+=+-1;
++++if+(date+!=+null)+{
++++++++Calendar+cal+=+Calendar.getInstance();
++++++++cal.setTime(date);
++++++++result+=+cal.get(Calendar.YEAR);
++++}
++++return+result;
}|code-block|syntax|javascript|1741688|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

If you want the year of any date object, I used the following method:

<pre><code>public static int getYearFromDate(Date date) {
 int result = -1;
 if (date != null) {
 Calendar cal = Calendar.getInstance();
 cal.setTime(date);
 result = cal.get(Calendar.YEAR);
 }
 return result;
}
</code></pre>

blocks|key|1526730|text|您也可以使用Java8的LocalDate|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1526731|import+java.time.LocalDate;
//...
int+year+=+LocalDate.now().getYear();|code-block|syntax|javascript|1526732|entityMap|0|LINK|mutability|MUTABLE|url|http://docs.oracle.com/javase/8/docs/api/java/time/LocalDate.html^0|C|9|C|9|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@$9|V|A|W|1|X]]|E|$]]|$1|F|3|G|5|H|7|Y|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Z|8|@]|D|@]|E|$]]]|L|$M|$5|N|O|P|E|$Q|R]]]]

You can also use Java 8's <a href="http://docs.oracle.com/javase/8/docs/api/java/time/LocalDate.html" rel="noreferrer"><code>LocalDate</code></a>:

<pre><code>import java.time.LocalDate;
//...
int year = LocalDate.now().getYear();
</code></pre>

blocks|key|1526817|text|对java+8使用以下代码：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1526818|LocalDate+localDate+=+LocalDate.now();
int+year+=+localDate.getYear();
int+month+=+localDate.getMonthValue();
int+date+=+localDate.getDayOfMonth();|code-block|syntax|javascript|1526819|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Use the following code for java 8 :

<pre><code>LocalDate localDate = LocalDate.now();
int year = localDate.getYear();
int month = localDate.getMonthValue();
int date = localDate.getDayOfMonth();
</code></pre>

blocks|key|1741579|text|如果您的应用程序大量使用Date和Calendar对象，那么您确实应该使用Joda+Time，因为java.util.Date是可变的。当字段更新时，java.util.Calendar会出现性能问题，而且对于datetime算法来说很笨重。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1741580|entityMap^0|1D|E|23|I|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|M|8|@]|D|@]|E|$]]]|G|$]]

If your application is making heavy use of Date and Calendar objects, you really should use Joda Time, because <code>java.util.Date</code> is mutable. <code>java.util.Calendar</code> has performance problems when its fields get updated, and is clunky for datetime arithmetic.

blocks|key|1526685|text|正如一些人在上面回答的那样：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1526686|如果您想在以后使用该变量，最好使用：|1526687|int+year;

year+=+Calendar.getInstance().get(Calendar.YEAR);|code-block|syntax|javascript|1526688|如果你只需要一个条件的年份，你最好使用：|1526689|Calendar.getInstance().get(Calendar.YEAR)|1526690|例如，当检查引入的年份不小于当前年份时，在do中使用它-200或大于当前年份(可以是出生年份)：|1526691|import+java.util.Calendar;
import+java.util.Scanner;

public+static+void+main+(String[]+args){

++++Scanner+scannernumber+=+new+Scanner(System.in);
++++int+year;

++++/*Checks+that+the+year+is+not+higher+than+the+current+year,+and+not+less+than+the+current+year+-+200+years.*/

++++do{
++++++++System.out.print("Year+(Between+"%2B((Calendar.getInstance().get(Calendar.YEAR))-200)%2B"+and+"%2BCalendar.getInstance().get(Calendar.YEAR)%2B")+:+");
++++++++year+=+scannernumber.nextInt();
++++}while(year+<+((Calendar.getInstance().get(Calendar.YEAR))-200)+%7C%7C+year+>+Calendar.getInstance().get(Calendar.YEAR));
}|1526692|entityMap^0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|V|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|W|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|X|8|@]|9|@]|A|$]]|$1|O|3|P|5|F|7|Y|8|@]|9|@]|A|$G|H]]|$1|Q|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|R|$]]

As some people answered above:

If you want to use the variable later, better use:

<pre><code>int year;

year = Calendar.getInstance().get(Calendar.YEAR);
</code></pre>

If you need the year for just a condition you better use:

<pre><code>Calendar.getInstance().get(Calendar.YEAR)
</code></pre>

For example using it in a do while that checks introduced year is not less than the current year-200 or more than the current year (Could be birth year):

<pre><code>import java.util.Calendar;
import java.util.Scanner;

public static void main (String[] args){

 Scanner scannernumber = new Scanner(System.in);
 int year;

 /*Checks that the year is not higher than the current year, and not less than the current year - 200 years.*/

 do{
 System.out.print("Year (Between "+((Calendar.getInstance().get(Calendar.YEAR))-200)+" and "+Calendar.getInstance().get(Calendar.YEAR)+") : ");
 year = scannernumber.nextInt();
 }while(year &lt; ((Calendar.getInstance().get(Calendar.YEAR))-200) || year &gt; Calendar.getInstance().get(Calendar.YEAR));
}
</code></pre>

blocks|key|1526885|text|在我的例子中，上述方法都不起作用。因此，在尝试了许多解决方案后，我找到了下面的一个，它对我很有效|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1526886|import+java.util.Scanner;
import+java.util.Date;

public+class+Practice
{+++
++++public+static+void+main(String[]+args)
++++{
++++++++Date+d=new+Date();++
++++++++int+year=d.getYear();
++++++++int+currentYear=year%2B1900;++++

++++++++System.out.println(currentYear);

++++}

}|code-block|syntax|javascript|1526887|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

In my case none of the above is worked. So After trying lot of solutions i found below one and it worked for me

<pre><code>import java.util.Scanner;
import java.util.Date;

public class Practice
{ 
 public static void main(String[] args)
 {
 Date d=new Date(); 
 int year=d.getYear();
 int currentYear=year+1900; 

 System.out.println(currentYear);

 }

}
</code></pre>

blocks|key|1526847|text|在Java版本中，8%2B可以(建议)使用java.time库。ISO+8601设置了写入日期的标准方式：YYYY-MM-DD和java.time.Instant使用它，因此(对于UTC)：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1526848|import+java.time.Instant;
int+myYear+=+Integer.parseInt(Instant.now().toString().substring(0,4));|code-block|syntax|javascript|1526849|另外，为了以防万一(是获取String的缩写，而不是int)，使用Calendar看起来更好，而且可以使其具有区域感知能力。|1526850|entityMap|0|LINK|mutability|MUTABLE|url|https://docs.oracle.com/javase/8/docs/api/java/time/package-summary.html|1|https://www.iso.org/iso-8601-date-and-time-format.html^0|1F|A|1Q|H|2G|3|J|9|0|U|8|1|0|0|D|6|Q|3|X|8|0^^$0|@$1|2|3|4|5|6|7|W|8|@$9|X|A|Y|B|C]|$9|Z|A|10|B|C]|$9|11|A|12|B|C]]|D|@$9|13|A|14|1|15]|$9|16|A|17|1|18]]|E|$]]|$1|F|3|G|5|H|7|19|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|1A|8|@$9|1B|A|1C|B|C]|$9|1D|A|1E|B|C]|$9|1F|A|1G|B|C]]|D|@]|E|$]]|$1|M|3|-4|5|6|7|1H|8|@]|D|@]|E|$]]]|N|$O|$5|P|Q|R|E|$S|T]]|U|$5|P|Q|R|E|$S|V]]]]

In Java version 8+ can (advised to) use <a href="https://docs.oracle.com/javase/8/docs/api/java/time/package-summary.html" rel="nofollow noreferrer">java.time</a> library. <a href="https://www.iso.org/iso-8601-date-and-time-format.html" rel="nofollow noreferrer">ISO 8601</a> sets standard way to write dates: <code>YYYY-MM-DD</code> and <code>java.time.Instant</code> uses it, so (for <code>UTC</code>):

<pre><code>import java.time.Instant;
int myYear = Integer.parseInt(Instant.now().toString().substring(0,4));
</code></pre>

P.S. just in case (and shorted for getting <code>String</code>, not <code>int</code>), using <code>Calendar</code> looks better and can be made zone-aware.

blocks|key|1741644|text|您可以使用Integer数学完成所有操作，而无需实例化日历：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1741645|return+(System.currentTimeMillis()/1000/3600/24/365.25+%2B1970);|code-block|syntax|javascript|1741646|可能会在新年休息一两个小时，但我不觉得这是个问题？|1741647|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

You can do the whole thing using Integer math without needing to instantiate a calendar:

<pre><code>return (System.currentTimeMillis()/1000/3600/24/365.25 +1970);
</code></pre>

May be off for an hour or two at new year but I don't get the impression that is an issue?

blocks|key|1741615|text|我使用我的库中的特殊函数来处理天/月/年整数-|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1741616|int[]+int_dmy(+long+timestamp+)+//+remember+month+is+[0..11]+!!!
{
++Calendar+cal+=+new+GregorianCalendar();+cal.setTimeInMillis(+timestamp+);
++return+new+int[]+{+
++++cal.get(+Calendar.DATE+),+cal.get(+Calendar.MONTH+),+cal.get(+Calendar.YEAR+)
++};
};


int[]+int_dmy(+Date+d+)+{+
+...
}|code-block|syntax|javascript|1741617|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

I use special functions in my library to work with days/month/year ints -

<pre><code>int[] int_dmy( long timestamp ) // remember month is [0..11] !!!
{
 Calendar cal = new GregorianCalendar(); cal.setTimeInMillis( timestamp );
 return new int[] { 
 cal.get( Calendar.DATE ), cal.get( Calendar.MONTH ), cal.get( Calendar.YEAR )
 };
};


int[] int_dmy( Date d ) { 
 ...
}
</code></pre>

I need to determine the current year in Java as an integer. I could just use <code>java.util.Date()</code>, but it is deprecated.

Get integer value of the current year in Java

Java

我需要将Java中的当前年份确定为一个整数。我可以只使用java.util.Date()，但它已被弃用。

问获取当前年份的整数值( Java )
EN

回答 14

Stack Overflow用户

Stack Overflow用户

Stack Overflow用户

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问获取当前年份的整数值( Java )EN

回答 14

Stack Overflow用户

Stack Overflow用户

Stack Overflow用户

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问获取当前年份的整数值( Java )
EN