blocks|key|798941|text|Calendar+cal+=+Calendar.getInstance();+
cal.add(Calendar.MONTH,+1);|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|798942|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>Calendar cal = Calendar.getInstance(); 
cal.add(Calendar.MONTH, 1);
</code></pre>

blocks|key|798990|text|您可以使用apache的commons+lang+DateUtils助手实用程序类。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|798991|Date+newDate+=+DateUtils.addMonths(new+Date(),+1);|code-block|syntax|javascript|798992|您可以在http://commons.apache.org/proper/commons-lang/下载commons+lang+jar|offset|length|798993|entityMap|0|LINK|mutability|MUTABLE|url|http://commons.apache.org/proper/commons-lang/^0|0|0|4|1A|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@$I|V|J|W|1|X]]|A|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|R]]]]

You can make use of apache's commons lang DateUtils helper utility class.

<pre><code>Date newDate = DateUtils.addMonths(new Date(), 1);
</code></pre>

You can download commons lang jar at <a href="http://commons.apache.org/proper/commons-lang/">http://commons.apache.org/proper/commons-lang/</a>

blocks|key|1013390|text|Calendar+cal+=+Calendar.getInstance();+
cal.add(Calendar.MONTH,+1);
java.util.Date+dt+=+cal.getTime();|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1013391|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>Calendar cal = Calendar.getInstance(); 
cal.add(Calendar.MONTH, 1);
java.util.Date dt = cal.getTime();
</code></pre>

blocks|key|1013384|text|(改编自Duggu)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1013385|public+static+Date+addOneMonth(Date+date)
{
++++Calendar+cal+=+Calendar.getInstance();
++++cal.setTime(date);
++++cal.add(Calendar.MONTH,+1);
++++return+cal.getTime();
}|code-block|syntax|javascript|1013386|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|$]]

(adapted from Duggu)

<pre><code>public static Date addOneMonth(Date date)
{
 Calendar cal = Calendar.getInstance();
 cal.setTime(date);
 cal.add(Calendar.MONTH, 1);
 return cal.getTime();
}
</code></pre>

blocks|key|799217|text|使用calander并尝试此代码。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|799218|Calendar+calendar+=+Calendar.getInstance();+++++++++
calendar.add(Calendar.MONTH,+1);
calendar.set(Calendar.DATE,+calendar.getActualMinimum(Calendar.DAY_OF_MONTH));
Date+nextMonthFirstDay+=+calendar.getTime();
calendar.set(Calendar.DATE,+calendar.getActualMaximum(Calendar.DAY_OF_MONTH));
Date+nextMonthLastDay+=+calendar.getTime();|code-block|syntax|javascript|799219|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 calander and try this code.

<pre><code>Calendar calendar = Calendar.getInstance(); 
calendar.add(Calendar.MONTH, 1);
calendar.set(Calendar.DATE, calendar.getActualMinimum(Calendar.DAY_OF_MONTH));
Date nextMonthFirstDay = calendar.getTime();
calendar.set(Calendar.DATE, calendar.getActualMaximum(Calendar.DAY_OF_MONTH));
Date nextMonthLastDay = calendar.getTime();
</code></pre>

blocks|key|799345|text|你可以在org.apache.commons.lang3.time包中使用DateUtils类|type|unstyled|depth|inlineStyleRanges|entityRanges|data|799346|DateUtils.addMonths(new+Date(),1);|code-block|syntax|javascript|799347|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|$]]

you can use DateUtils class in org.apache.commons.lang3.time package

<pre><code>DateUtils.addMonths(new Date(),1);
</code></pre>

blocks|key|1013605|text|public+Date++addMonths(String+dateAsString,+int+nbMonths)+throws+ParseException+{
++++++++String+format+=+"MM/dd/yyyy"+;
++++++++SimpleDateFormat+sdf+=+new+SimpleDateFormat(format)+;
++++++++Date+dateAsObj+=+sdf.parse(dateAsString)+;
++++++++Calendar+cal+=+Calendar.getInstance();
++++++++cal.setTime(dateAsObj);
++++++++cal.add(Calendar.MONTH,+nbMonths);
++++++++Date+dateAsObjAfterAMonth+=+cal.getTime()+;
++++System.out.println(sdf.format(dateAsObjAfterAMonth));
++++return+dateAsObjAfterAMonth+;
}`|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1013606|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>public Date addMonths(String dateAsString, int nbMonths) throws ParseException {
 String format = "MM/dd/yyyy" ;
 SimpleDateFormat sdf = new SimpleDateFormat(format) ;
 Date dateAsObj = sdf.parse(dateAsString) ;
 Calendar cal = Calendar.getInstance();
 cal.setTime(dateAsObj);
 cal.add(Calendar.MONTH, nbMonths);
 Date dateAsObjAfterAMonth = cal.getTime() ;
 System.out.println(sdf.format(dateAsObjAfterAMonth));
 return dateAsObjAfterAMonth ;
}`
</code></pre>

blocks|key|1013561|text|如果您需要一行代码(即Jasper报告公式)，并且不介意调整时间不是恰好一个月(即"30天“就足够了)：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1013562|new+Date($F{invoicedate}.getTime()+%2B+30L+*+24L+*+60L+*+60L+*+1000L)|offset|length|style|CODE|1013563|entityMap^0|0|0|1V|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@$D|L|E|M|F|G]]|9|@]|A|$]]|$1|H|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|I|$]]

If you need a one-liner (i.e. for Jasper Reports formula) and don't mind if the adjustment is not exactly one month (i.e "30 days" is enough): 

<code>new Date($F{invoicedate}.getTime() + 30L * 24L * 60L * 60L * 1000L)</code>

blocks|key|1013664|text|此方法返回当前日期加1个月。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1013665|public+Date++addOneMonth()++{
++++++++Calendar+cal+=+Calendar.getInstance();
++++++++cal.add(Calendar.MONTH,+1);
++++++++return+cal.getTime();
}`|code-block|syntax|javascript|1013666|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|$]]

This method returns the current date plus 1 month.

<pre><code>public Date addOneMonth() {
 Calendar cal = Calendar.getInstance();
 cal.add(Calendar.MONTH, 1);
 return cal.getTime();
}`
</code></pre>

blocks|key|799102|text|为了找出一个月后的第几天，有必要看看今天是哪个月的哪一天。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|799103|因此，如果这一天是每月的第一天，则按照以下代码运行|799104|Calendar+calendar+=+Calendar.getInstance();

++++Calendar+calFebruary+=+Calendar.getInstance();
++++calFebruary.set(Calendar.MONTH,+Calendar.FEBRUARY);

++++if+(calendar.get(Calendar.DAY_OF_MONTH)+==+1)+{//+if+first+day+of+month
++++calendar.add(Calendar.MONTH,+1);
++++calendar.set(Calendar.DATE,+calendar.getActualMinimum(Calendar.DAY_OF_MONTH));
++++Date+nextMonthFirstDay+=+calendar.getTime();
++++System.out.println(nextMonthFirstDay);

++++}|code-block|syntax|javascript|799105|如果这一天是一个月的最后一天，则运行以下代码。|799106|++++else+if+((calendar.getActualMaximum(Calendar.DAY_OF_MONTH)+==+calendar.get(Calendar.DAY_OF_MONTH)))+{//+if+last+day+of+month
++++calendar.add(Calendar.MONTH,+1);
++++calendar.set(Calendar.DATE,+calendar.getActualMaximum(Calendar.DAY_OF_MONTH));
++++Date+nextMonthLastDay+=+calendar.getTime();
++++System.out.println(nextMonthLastDay);
++++}|799107|如果这一天在二月，则运行以下代码|799108|++++else+if+(calendar.get(Calendar.MONTH)+==+Calendar.JANUARY
++++++++++++&&+calendar.get(Calendar.DAY_OF_MONTH)+>+calFebruary.getActualMaximum(Calendar.DAY_OF_MONTH))+{//+control+of+february

++++calendar.add(Calendar.MONTH,+1);
++++calendar.set(Calendar.DATE,+calendar.getActualMaximum(Calendar.DAY_OF_MONTH));
++++Date+nextMonthLastDay+=+calendar.getTime();
++++System.out.println(nextMonthLastDay);

++++}|799109|以下代码用于其他情况。|799110|++++else+{+//+any+day
++++calendar.add(Calendar.DATE,+calendar.getActualMaximum(Calendar.DAY_OF_MONTH));
++++Date+theNextDate+=+calendar.getTime();
++++System.out.println(theNextDate);
++++}|799111|entityMap^0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|X|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|Y|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|Z|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|10|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|11|8|@]|9|@]|A|$]]|$1|O|3|P|5|F|7|12|8|@]|9|@]|A|$G|H]]|$1|Q|3|R|5|6|7|13|8|@]|9|@]|A|$]]|$1|S|3|T|5|F|7|14|8|@]|9|@]|A|$G|H]]|$1|U|3|-4|5|6|7|15|8|@]|9|@]|A|$]]]|V|$]]

In order to find the day after one month, it is necessary to look at what day of the month it is today.

So if the day is first day of month run following code

<pre><code>Calendar calendar = Calendar.getInstance();

 Calendar calFebruary = Calendar.getInstance();
 calFebruary.set(Calendar.MONTH, Calendar.FEBRUARY);

 if (calendar.get(Calendar.DAY_OF_MONTH) == 1) {// if first day of month
 calendar.add(Calendar.MONTH, 1);
 calendar.set(Calendar.DATE, calendar.getActualMinimum(Calendar.DAY_OF_MONTH));
 Date nextMonthFirstDay = calendar.getTime();
 System.out.println(nextMonthFirstDay);

 }
</code></pre>

if the day is last day of month, run following codes.

<pre><code> else if ((calendar.getActualMaximum(Calendar.DAY_OF_MONTH) == calendar.get(Calendar.DAY_OF_MONTH))) {// if last day of month
 calendar.add(Calendar.MONTH, 1);
 calendar.set(Calendar.DATE, calendar.getActualMaximum(Calendar.DAY_OF_MONTH));
 Date nextMonthLastDay = calendar.getTime();
 System.out.println(nextMonthLastDay);
 }
</code></pre>

if the day is in february run following code

<pre><code> else if (calendar.get(Calendar.MONTH) == Calendar.JANUARY
 &amp;&amp; calendar.get(Calendar.DAY_OF_MONTH) &gt; calFebruary.getActualMaximum(Calendar.DAY_OF_MONTH)) {// control of february

 calendar.add(Calendar.MONTH, 1);
 calendar.set(Calendar.DATE, calendar.getActualMaximum(Calendar.DAY_OF_MONTH));
 Date nextMonthLastDay = calendar.getTime();
 System.out.println(nextMonthLastDay);

 }
</code></pre>

the following codes are used for other cases.

<pre><code> else { // any day
 calendar.add(Calendar.DATE, calendar.getActualMaximum(Calendar.DAY_OF_MONTH));
 Date theNextDate = calendar.getTime();
 System.out.println(theNextDate);
 }
</code></pre>

blocks|key|1013691|text|你可以像这样使用；|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1013692|SimpleDateFormat+sdf+=+new+SimpleDateFormat("yyyy-MM-dd");
String+d+=+"2000-01-30";
Date+date=+new+Date(sdf.parse(d).getTime());
date.setMonth(date.getMonth()+%2B+1);|code-block|syntax|javascript|1013693|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|$]]

You can use like this;

<pre><code>SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
String d = "2000-01-30";
Date date= new Date(sdf.parse(d).getTime());
date.setMonth(date.getMonth() + 1);
</code></pre>

blocks|key|799322|text|++++Date+dateAfterOneMonth+=+new+DateTime(System.currentTimeMillis()).plusMonths(1).toDate();|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|799323|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code> Date dateAfterOneMonth = new DateTime(System.currentTimeMillis()).plusMonths(1).toDate();
</code></pre>

blocks|key|799375|text|public+class+StringSplit+{

++++public+static+void+main(String[]+args)+{
++++++++//+TODO+Auto-generated+method+stub

++++++++date(5,+3);
++++++++date(5,+4);
++++}

++++public+static+String+date(int+month,+int+week)+{
++++++++LocalDate+futureDate+=+LocalDate.now().plusMonths(month).plusWeeks(week);
++++++++String+Fudate+=+futureDate.toString();
++++++++String[]+arr+=+Fudate.split("-",+3);
++++++++String+a1+=+arr[0];
++++++++String+a2+=+arr[1];
++++++++String+a3+=+arr[2];
++++++++String+date+=+a3+%2B+"/"+%2B+a2+%2B+"/"+%2B+a1;
++++++++System.out.println(date);
++++++++return+date;
++++}
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|799376|输出：|unstyled|799377|10/03/2020
17/03/2020|799378|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|L|8|@]|9|@]|A|$]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$B|C]]|$1|I|3|-4|5|F|7|N|8|@]|9|@]|A|$]]]|J|$]]

<pre><code>public class StringSplit {

 public static void main(String[] args) {
 // TODO Auto-generated method stub

 date(5, 3);
 date(5, 4);
 }

 public static String date(int month, int week) {
 LocalDate futureDate = LocalDate.now().plusMonths(month).plusWeeks(week);
 String Fudate = futureDate.toString();
 String[] arr = Fudate.split("-", 3);
 String a1 = arr[0];
 String a2 = arr[1];
 String a3 = arr[2];
 String date = a3 + "/" + a2 + "/" + a1;
 System.out.println(date);
 return date;
 }
}
</code></pre>

Output:

<pre><code>10/03/2020
17/03/2020
</code></pre>

In Java how can I add one month to the current date?

How do I add one month to current date in Java?

Java

在Java中，如何在当前日期基础上添加一个月？

问如何在Java中向当前日期添加一个月？
EN

回答 13

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问如何在Java中向当前日期添加一个月？
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