blocks|key|176108|text|获取它的最简单方法是使用日期模式-+h:mm+a，其中|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|176109|176110|小时制上午/下午(1-12)|unordered-list-item|176111|m+-分钟制小时|176112|a-+am/pm标记|176113|176114|代码片段：|176115|DateFormat+dateFormat+=+new+SimpleDateFormat("hh:mm+a");|code-block|syntax|javascript|176116|Read+more+on+documentation+-+SimpleDateFormat+java+7+|176117|entityMap|0|LINK|mutability|MUTABLE|url|http://docs.oracle.com/javase/7/docs/api/java/text/SimpleDateFormat.html^0|I|6|0|0|0|0|0|0|0|0|0|1H|0|0^^$0|@$1|2|3|4|5|6|7|15|8|@$9|16|A|17|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|18|8|@]|D|@]|E|$]]|$1|G|3|H|5|I|7|19|8|@]|D|@]|E|$]]|$1|J|3|K|5|I|7|1A|8|@]|D|@]|E|$]]|$1|L|3|M|5|I|7|1B|8|@]|D|@]|E|$]]|$1|N|3|-4|5|6|7|1C|8|@]|D|@]|E|$]]|$1|O|3|P|5|6|7|1D|8|@]|D|@]|E|$]]|$1|Q|3|R|5|S|7|1E|8|@]|D|@]|E|$T|U]]|$1|V|3|W|5|6|7|1F|8|@]|D|@$9|1G|A|1H|1|1I]]|E|$]]|$1|X|3|-4|5|6|7|1J|8|@]|D|@]|E|$]]]|Y|$Z|$5|10|11|12|E|$13|14]]]]

Easiest way to get it by using date pattern - <code>h:mm a</code>, where 

<ul>
<li>h - Hour in am/pm (1-12)</li>
<li>m - Minute in hour</li>
<li>a - Am/pm marker</li>
</ul>

Code snippet :

<pre><code>DateFormat dateFormat = new SimpleDateFormat("hh:mm a");
</code></pre>

<a href="http://docs.oracle.com/javase/7/docs/api/java/text/SimpleDateFormat.html">Read more on documentation - SimpleDateFormat java 7 </a>

blocks|key|176832|text|使用此SimpleDateFormat+formatDate+=+new+SimpleDateFormat("hh:mm+a");|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|176833|​|176834|📷|atomic|176835|176836|Java+docs+for+SimpleDateFormat|176837|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/306617c59c9f0bf4e7aedb9f02ae1a98.png|imageAlt|1|LINK|MUTABLE|url|http://docs.oracle.com/javase/7/docs/api/java/text/SimpleDateFormat.html^0|3|1Q|0|0|0|1|0|0|0|0|U|1|0^^$0|@$1|2|3|4|5|6|7|11|8|@$9|12|A|13|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|14|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|15|8|@]|D|@$9|16|A|17|1|18]]|E|$]]|$1|K|3|G|5|6|7|19|8|@]|D|@]|E|$]]|$1|L|3|M|5|6|7|1A|8|@]|D|@$9|1B|A|1C|1|1D]]|E|$]]|$1|N|3|-4|5|6|7|1E|8|@]|D|@]|E|$]]]|O|$P|$5|Q|R|S|E|$T|U|V|-4]]|W|$5|X|R|Y|E|$Z|10]]]]

Use this <code>SimpleDateFormat formatDate = new SimpleDateFormat("hh:mm a");</code>

<img src="https://i.stack.imgur.com/5K434.png" alt="enter image description here">

<a href="http://docs.oracle.com/javase/7/docs/api/java/text/SimpleDateFormat.html">Java docs for SimpleDateFormat</a>

blocks|key|178637|text|使用"hh:mm+a"而不是"HH:mm+a"。这里hh表示12小时格式，HH表示24小时格式。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|178638|Live+Demo|178639|entityMap|0|LINK|mutability|MUTABLE|url|http://ideone.com/ACldIF^0|2|9|E|9|Q|2|11|2|0|5|4|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@$9|Q|A|R|B|C]|$9|S|A|T|B|C]|$9|U|A|V|B|C]|$9|W|A|X|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|Y|8|@]|D|@$9|Z|A|10|1|11]]|E|$]]|$1|H|3|-4|5|6|7|12|8|@]|D|@]|E|$]]]|I|$J|$5|K|L|M|E|$N|O]]]]

use <code>"hh:mm a"</code> instead of <code>"HH:mm a"</code>. Here <code>hh</code> for 12 hour format and <code>HH</code> for 24 hour format.

Live <a href="http://ideone.com/ACldIF">Demo</a>

blocks|key|2996048|text|SimpleDateFormat+dateFormat+=+new+SimpleDateFormat("dd-MMM-yy+hh.mm.ss.S+aa");
String+formattedDate+=+dateFormat.format(new+Date()).toString();
System.out.println(formattedDate);|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|2996049|输出:11-9月13日12.25.15.375+PM|unstyled|2996050|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>SimpleDateFormat dateFormat = new SimpleDateFormat("dd-MMM-yy hh.mm.ss.S aa");
String formattedDate = dateFormat.format(new Date()).toString();
System.out.println(formattedDate);
</code></pre>

Output:
 11-Sep-13 12.25.15.375 PM

blocks|key|2996055|text|只需替换下面的语句，它就可以工作了。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2996056|SimpleDateFormat+formatDate+=+new+SimpleDateFormat("hh:mm+a");|code-block|syntax|javascript|2996057|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|$]]

Just replace below statement and it will work. 

<pre><code>SimpleDateFormat formatDate = new SimpleDateFormat("hh:mm a");
</code></pre>

blocks|key|2783624|text|SimpleDateFormat+dateFormat+=+new+SimpleDateFormat("yyyy-MM-dd+hh:mm+a");|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|2783625|这将显示日期和时间|unstyled|2783626|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>SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd hh:mm a");
</code></pre>

This will display the date and time

blocks|key|2783636|text|++++//To+get+Filename+%2B+date+and+time


++++SimpleDateFormat+f+=+new+SimpleDateFormat("MMM");
++++SimpleDateFormat+f1+=+new+SimpleDateFormat("dd");
++++SimpleDateFormat+f2+=+new+SimpleDateFormat("a");

++++int+h;
+++++++++if(Calendar.getInstance().get(Calendar.HOUR)==0)
++++++++++++h=12;
+++++++++else
++++++++++++h=Calendar.getInstance().get(Calendar.HOUR)

++++String+filename="TestReport"%2Bf1.format(new+Date())%2Bf.format(new+Date())%2Bh%2Bf2.format(new+Date())%2B".txt";


The+Output+Like:TestReport27Apr3PM.txt|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|2783637|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> //To get Filename + date and time


 SimpleDateFormat f = new SimpleDateFormat("MMM");
 SimpleDateFormat f1 = new SimpleDateFormat("dd");
 SimpleDateFormat f2 = new SimpleDateFormat("a");

 int h;
 if(Calendar.getInstance().get(Calendar.HOUR)==0)
 h=12;
 else
 h=Calendar.getInstance().get(Calendar.HOUR)

 String filename="TestReport"+f1.format(new Date())+f.format(new Date())+h+f2.format(new Date())+".txt";


The Output Like:TestReport27Apr3PM.txt
</code></pre>

blocks|key|2996087|text|SimpleDateFormat+sdf+=+new+SimpleDateFormat("hh:mm:ss+a");|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|2996088|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>SimpleDateFormat sdf = new SimpleDateFormat("hh:mm:ss a");
</code></pre>

blocks|key|2996101|text|SimpleDateFormat+formatDate+=+new+SimpleDateFormat("hh:mm:ss+a");|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|2996102|unstyled|2996103|h用于AM/PM时间(1-12)。|unordered-list-item|2996104|H用于24小时时间(1-24)。|2996105|a是AM/PM标记|2996106|m以小时为单位|2996107|2996108|注意:两个h将打印一个前导零:+01:13+PM一小时将不打印前导零:+1:13+PM|2996109|看起来基本上每个人都已经抢先一步了，但是我离题了。|2996110|entityMap^0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|V|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|W|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|X|8|@]|9|@]|A|$]]|$1|I|3|J|5|H|7|Y|8|@]|9|@]|A|$]]|$1|K|3|L|5|H|7|Z|8|@]|9|@]|A|$]]|$1|M|3|N|5|H|7|10|8|@]|9|@]|A|$]]|$1|O|3|-4|5|E|7|11|8|@]|9|@]|A|$]]|$1|P|3|Q|5|E|7|12|8|@]|9|@]|A|$]]|$1|R|3|S|5|E|7|13|8|@]|9|@]|A|$]]|$1|T|3|-4|5|E|7|14|8|@]|9|@]|A|$]]]|U|$]]

<pre><code>SimpleDateFormat formatDate = new SimpleDateFormat("hh:mm:ss a");
</code></pre>

<ul>
<li>h is used for AM/PM times (1-12).</li>
<li>H is used for 24 hour times (1-24).</li>
<li>a is the AM/PM marker </li>
<li>m is minute in hour</li>
</ul>

Note: Two h's will print a leading zero: 01:13 PM. One h will print without the leading zero: 1:13 PM.

Looks like basically everyone beat me to it already, but I digress

blocks|key|174949|text|您可以使用SimpleDateFormat来实现这一点。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|174950|SimpleDateFormat+formatDate+=+new+SimpleDateFormat("hh:mm+a");|code-block|syntax|javascript|174951|希望这对你有帮助。|174952|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 use SimpleDateFormat for this. 

<pre><code>SimpleDateFormat formatDate = new SimpleDateFormat("hh:mm a");
</code></pre>

Hope this helps you.

blocks|key|176891|text|//+hh:mm+will+print+hours+in+12hrs+clock+and+mins+(e.g.+02:30)
System.out.println(DateTimeFormatter.ofPattern("hh:mm").format(LocalTime.now()));

//+HH:mm+will+print+hours+in+24hrs+clock+and+mins+(e.g.+14:30)
System.out.println(DateTimeFormatter.ofPattern("HH:mm").format(LocalTime.now()));+

//+hh:mm+a+will+print+hours+in+12hrs+clock,+mins+and+AM/PM+(e.g.+02:30+PM)
System.out.println(DateTimeFormatter.ofPattern("hh:mm+a").format(LocalTime.now()));+|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|176892|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>// hh:mm will print hours in 12hrs clock and mins (e.g. 02:30)
System.out.println(DateTimeFormatter.ofPattern("hh:mm").format(LocalTime.now()));

// HH:mm will print hours in 24hrs clock and mins (e.g. 14:30)
System.out.println(DateTimeFormatter.ofPattern("HH:mm").format(LocalTime.now())); 

// hh:mm a will print hours in 12hrs clock, mins and AM/PM (e.g. 02:30 PM)
System.out.println(DateTimeFormatter.ofPattern("hh:mm a").format(LocalTime.now())); 
</code></pre>

blocks|key|2996150|text|使用Java8的：|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|2996151|LocalTime+localTime+=+LocalTime.now();
DateTimeFormatter+dateTimeFormatter+=+DateTimeFormatter.ofPattern("hh:mm+a");
System.out.println(localTime.format(dateTimeFormatter));|code-block|syntax|javascript|2996152|输出为AM/PM格式。|CODE|2996153|Sample+output:++3:00+PM|2996154|entityMap^0|8|1|0|0|3|5|0|0^^$0|@$1|2|3|4|5|6|7|R|8|@$9|S|A|T|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|U|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|V|8|@$9|W|A|X|B|M]]|D|@]|E|$]]|$1|N|3|O|5|H|7|Y|8|@]|D|@]|E|$I|J]]|$1|P|3|-4|5|6|7|Z|8|@]|D|@]|E|$]]]|Q|$]]

Using Java 8:

<pre><code>LocalTime localTime = LocalTime.now();
DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern("hh:mm a");
System.out.println(localTime.format(dateTimeFormatter));
</code></pre>

The output is in <code>AM/PM</code> Format.

<pre><code>Sample output: 3:00 PM
</code></pre>

blocks|key|2996156|text|要将当前的移动日期和时间格式放入|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2996157|2996158|+Feb+-+9,2018+10:36:59+PM|blockquote|2996159|2996160|2996161|Date+date+=+new+Date();
+String+stringDate+=+DateFormat.getDateTimeInstance().format(date);|code-block|syntax|javascript|2996162|您可以使用TextView将其显示给Activity、Fragment、CardView、ListView+anywhere|offset|length|style|CODE|2996163|`+TextView+mDateTime;

++mDateTime=findViewById(R.id.Your_TextViewId_Of_XML);

++Date+date+=+new+Date();
++String+mStringDate+=+DateFormat.getDateTimeInstance().format(date);
++mDateTime.setText("My+Device+Current+Date+and+Time+is:"%2Bdate);

++`|2996164|entityMap^0|0|0|0|0|0|0|5|8|I|8|R|8|10|8|19|8|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|X|8|@]|9|@]|A|$]]|$1|C|3|D|5|E|7|Y|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]|$1|G|3|-4|5|6|7|10|8|@]|9|@]|A|$]]|$1|H|3|I|5|J|7|11|8|@]|9|@]|A|$K|L]]|$1|M|3|N|5|6|7|12|8|@$O|13|P|14|Q|R]|$O|15|P|16|Q|R]|$O|17|P|18|Q|R]|$O|19|P|1A|Q|R]|$O|1B|P|1C|Q|R]]|9|@]|A|$]]|$1|S|3|T|5|J|7|1D|8|@]|9|@]|A|$K|L]]|$1|U|3|-4|5|6|7|1E|8|@]|9|@]|A|$]]]|V|$]]

To put your current mobile date and time format in 

<blockquote>
 Feb 9, 2018 10:36:59 PM
</blockquote>

<pre><code>Date date = new Date();
 String stringDate = DateFormat.getDateTimeInstance().format(date);
</code></pre>

you can show it to your <code>Activity</code>, <code>Fragment</code>, <code>CardView</code>, <code>ListView</code> anywhere by using <code>TextView</code>

<pre><code>` TextView mDateTime;

 mDateTime=findViewById(R.id.Your_TextViewId_Of_XML);

 Date date = new Date();
 String mStringDate = DateFormat.getDateTimeInstance().format(date);
 mDateTime.setText("My Device Current Date and Time is:"+date);

 `
</code></pre>

blocks|key|174977|text|import+java.text.SimpleDateFormat;
import+java.text.DateFormat;
import+java.util.Date;

public+class+Main+{
+++public+static+void+main(String+[]+args){
+++++++try+{
++++++++++++DateFormat+parseFormat+=+new+SimpleDateFormat("dd-MM-yyyy+HH:mm+a");
++++++++++++String+sDate+=+"22-01-2019+13:35+PM";
++++++++++++Date+date+=+parseFormat.parse(sDate);
++++++++++++SimpleDateFormat+displayFormat+=+new+SimpleDateFormat("dd-MM-yyyy+hh:mm+a");
++++++++++++sDate+=+displayFormat.format(date);
++++++++++++System.out.println("The+required+format+:+"+%2B+sDate);
++++++++}+catch+(Exception+e)+{}
+++}
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|174978|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>import java.text.SimpleDateFormat;
import java.text.DateFormat;
import java.util.Date;

public class Main {
 public static void main(String [] args){
 try {
 DateFormat parseFormat = new SimpleDateFormat("dd-MM-yyyy HH:mm a");
 String sDate = "22-01-2019 13:35 PM";
 Date date = parseFormat.parse(sDate);
 SimpleDateFormat displayFormat = new SimpleDateFormat("dd-MM-yyyy hh:mm a");
 sDate = displayFormat.format(date);
 System.out.println("The required format : " + sDate);
 } catch (Exception e) {}
 }
}
</code></pre>

blocks|key|2783792|text|如果你想要Android中的AM，PM的当前时间，请使用|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|2783793|String+time+=+new+SimpleDateFormat("hh+:+mm+a",+Locale.getDefault()).format(Calendar.getInstance().getTime());|code-block|syntax|javascript|2783794|如果您想要与am，pm的当前时间|2783795|String+time+=+new+SimpleDateFormat("hh+:+mm+a",+Locale.getDefault()).format(Calendar.getInstance().getTime()).toLowerCase();|2783796|或|2783797|来自API+level+26的|2783798|LocalTime+localTime+=+LocalTime.now();
DateTimeFormatter+dateTimeFormatter+=+DateTimeFormatter.ofPattern("hh:mm+a");
String+time+=+localTime.format(dateTimeFormatter);|2783799|entityMap^0|5|7|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@$9|X|A|Y|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|Z|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|10|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|11|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|12|8|@]|D|@]|E|$]]|$1|Q|3|R|5|6|7|13|8|@]|D|@]|E|$]]|$1|S|3|T|5|H|7|14|8|@]|D|@]|E|$I|J]]|$1|U|3|-4|5|6|7|15|8|@]|D|@]|E|$]]]|V|$]]

If you want current time with AM, PM in Android use

<pre><code>String time = new SimpleDateFormat("hh : mm a", Locale.getDefault()).format(Calendar.getInstance().getTime());
</code></pre>

If you want current time with am, pm 

<pre><code>String time = new SimpleDateFormat("hh : mm a", Locale.getDefault()).format(Calendar.getInstance().getTime()).toLowerCase();
</code></pre>

OR

From API level 26

<pre><code>LocalTime localTime = LocalTime.now();
DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern("hh:mm a");
String time = localTime.format(dateTimeFormatter);
</code></pre>

blocks|key|2996324|text|tl;dr|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2996325|让JSR310的现代java.time类自动生成本地化文本，而不是硬编码12小时时钟和AM/PM。|2996326|LocalTime+++++++++++++++++++++++++++++++++++++//+Represent+a+time-of-day,+without+date,+without+time+zone+or+offset-from-UTC.
.now(+++++++++++++++++++++++++++++++++++++++++//+Capture+the+current+time-of-day+as+seen+in+a+particular+time+zone.
++++ZoneId.of(+"Africa/Casablanca"+)++++++++++
)+++++++++++++++++++++++++++++++++++++++++++++//+Returns+a+`LocalTime`+object.
.format(++++++++++++++++++++++++++++++++++++++//+Generate+text+representing+the+value+in+our+`LocalTime`+object.
++++DateTimeFormatter+++++++++++++++++++++++++//+Class+responsible+for+generating+text+representing+the+value+of+a+java.time+object.
++++.ofLocalizedTime(+++++++++++++++++++++++++//+Automatically+localize+the+text+being+generated.
++++++++FormatStyle.SHORT+++++++++++++++++++++//+Specify+how+long+or+abbreviated+the+generated+text+should+be.
++++)+++++++++++++++++++++++++++++++++++++++++//+Returns+a+`DateTimeFormatter`+object.
++++.withLocale(+Locale.US+)++++++++++++++++++//+Specifies+a+particular+locale+for+the+`DateTimeFormatter`+rather+than+rely+on+the+JVM’s+current+default+locale.+Returns+another+separate+`DateTimeFormatter`+object+rather+than+altering+the+first,+per+immutable+objects+pattern.
)+++++++++++++++++++++++++++++++++++++++++++++//+Returns+a+`String`+object.|code-block|syntax|javascript|2996327|2996328|上午10:31|blockquote|2996329|2996330|2996331|自动本地化|2996332|您可能希望让java.time自动为您本地化，而不是坚持使用AM/PM的12小时工作时间。给DateTimeFormatter.ofLocalizedTime打电话。|offset|length|style|CODE|2996333|要本地化，请指定：|2996334|2996335|FormatStyle确定字符串be.|unordered-list-item|2996336|Locale的长度或缩写such.|2996337|确定：|2996338|用于翻译日期名称、月份名称等的人类语言。|2996339|决定缩写、大写、标点符号、分隔符和such等问题的文化规范|2996340|2996341|​|2996342|在这里，我们获得在特定时区中看到的当前时间。然后我们生成文本来表示该时间。我们在加拿大文化中本地化为法语，然后在美国文化中本地化为英语。|2996343|ZoneId+z+=+ZoneId.of(+"Asia/Tokyo"+)+;
LocalTime+localTime+=+LocalTime.now(+z+)+;

//+Québec
Locale+locale_fr_CA+=+Locale.CANADA_FRENCH+;++//+Or+`Locale.US`,+and+so+on.
DateTimeFormatter+formatterQuébec+=+DateTimeFormatter.ofLocalizedTime(+FormatStyle.SHORT+).withLocale(+locale_fr_CA+)+;
String+outputQuébec+=+localTime.format(+formatterQuébec+)+;

System.out.println(+outputQuébec+)+;

//+US
Locale+locale_en_US+=+Locale.US+;++
DateTimeFormatter+formatterUS+=+DateTimeFormatter.ofLocalizedTime(+FormatStyle.SHORT+).withLocale(+locale_en_US+)+;
String+outputUS+=+localTime.format(+formatterUS+)+;

System.out.println(+outputUS+)+;|2996344|请参阅此code+run+live+at+IdeOne.com。|2996345|2996346|+10小时31|2996347|2996348|上午10:31+|2996349|entityMap|0|LINK|mutability|MUTABLE|url|https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/time/format/DateTimeFormatter.html#ofLocalizedTime(java.time.format.FormatStyle))|1|https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/time/format/FormatStyle.html|2|https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/Locale.html|3|https://ideone.com/ZGZJkp^0|0|0|0|0|0|0|0|0|1A|X|1A|X|0|0|0|0|0|B|0|B|1|0|0|6|0|6|2|0|0|0|0|0|0|0|0|4|R|3|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|23|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|24|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|25|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|26|8|@]|9|@]|A|$]]|$1|J|3|K|5|L|7|27|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|28|8|@]|9|@]|A|$]]|$1|N|3|-4|5|6|7|29|8|@]|9|@]|A|$]]|$1|O|3|P|5|6|7|2A|8|@]|9|@]|A|$]]|$1|Q|3|R|5|6|7|2B|8|@$S|2C|T|2D|U|V]]|9|@$S|2E|T|2F|1|2G]]|A|$]]|$1|W|3|X|5|6|7|2H|8|@]|9|@]|A|$]]|$1|Y|3|-4|5|6|7|2I|8|@]|9|@]|A|$]]|$1|Z|3|10|5|11|7|2J|8|@$S|2K|T|2L|U|V]]|9|@$S|2M|T|2N|1|2O]]|A|$]]|$1|12|3|13|5|11|7|2P|8|@$S|2Q|T|2R|U|V]]|9|@$S|2S|T|2T|1|2U]]|A|$]]|$1|14|3|15|5|6|7|2V|8|@]|9|@]|A|$]]|$1|16|3|17|5|11|7|2W|8|@]|9|@]|A|$]]|$1|18|3|19|5|11|7|2X|8|@]|9|@]|A|$]]|$1|1A|3|-4|5|6|7|2Y|8|@]|9|@]|A|$]]|$1|1B|3|1C|5|6|7|2Z|8|@]|9|@]|A|$]]|$1|1D|3|1E|5|6|7|30|8|@]|9|@]|A|$]]|$1|1F|3|1G|5|F|7|31|8|@]|9|@]|A|$G|H]]|$1|1H|3|1I|5|6|7|32|8|@]|9|@$S|33|T|34|1|35]]|A|$]]|$1|1J|3|-4|5|6|7|36|8|@]|9|@]|A|$]]|$1|1K|3|1L|5|L|7|37|8|@]|9|@]|A|$]]|$1|1M|3|-4|5|6|7|38|8|@]|9|@]|A|$]]|$1|1N|3|1O|5|6|7|39|8|@]|9|@]|A|$]]|$1|1P|3|-4|5|6|7|3A|8|@]|9|@]|A|$]]]|1Q|$1R|$5|1S|1T|1U|A|$1V|1W]]|1X|$5|1S|1T|1U|A|$1V|1Y]]|1Z|$5|1S|1T|1U|A|$1V|20]]|21|$5|1S|1T|1U|A|$1V|22]]]]

<h1>tl;dr</h1>

Let the modern java.time classes of JSR 310 automatically generate localized text, rather than hard-coding 12-hour clock and AM/PM.

<pre><code>LocalTime // Represent a time-of-day, without date, without time zone or offset-from-UTC.
.now( // Capture the current time-of-day as seen in a particular time zone.
 ZoneId.of( "Africa/Casablanca" ) 
) // Returns a `LocalTime` object.
.format( // Generate text representing the value in our `LocalTime` object.
 DateTimeFormatter // Class responsible for generating text representing the value of a java.time object.
 .ofLocalizedTime( // Automatically localize the text being generated.
 FormatStyle.SHORT // Specify how long or abbreviated the generated text should be.
 ) // Returns a `DateTimeFormatter` object.
 .withLocale( Locale.US ) // Specifies a particular locale for the `DateTimeFormatter` rather than rely on the JVM’s current default locale. Returns another separate `DateTimeFormatter` object rather than altering the first, per immutable objects pattern.
) // Returns a `String` object.
</code></pre>

<blockquote>
 10:31 AM
</blockquote>

<h1>Automatically localize</h1>

Rather than insisting on 12-hour clock with AM/PM, you may want to let java.time automatically localize for you. Call <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/time/format/DateTimeFormatter.html#ofLocalizedTime(java.time.format.FormatStyle)" rel="noreferrer"><code>DateTimeFormatter.ofLocalizedTime</code></a>.

To localize, specify:

<ul>
<li><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/time/format/FormatStyle.html" rel="noreferrer"><code>FormatStyle</code></a> to determine how long or abbreviated should the string be.</li>
<li><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/Locale.html" rel="noreferrer"><code>Locale</code></a> to determine:

<ul>
<li>The human language for translation of name of day, name of month, and such.</li>
<li>The cultural norms deciding issues of abbreviation, capitalization, punctuation, separators, and such.</li>
</ul></li>
</ul>

Here we get the current time-of-day as seen in a particular time zone. Then we generate text to represent that time. We localize to French language in Canada culture, then English language in US culture.

<pre><code>ZoneId z = ZoneId.of( "Asia/Tokyo" ) ;
LocalTime localTime = LocalTime.now( z ) ;

// Québec
Locale locale_fr_CA = Locale.CANADA_FRENCH ; // Or `Locale.US`, and so on.
DateTimeFormatter formatterQuébec = DateTimeFormatter.ofLocalizedTime( FormatStyle.SHORT ).withLocale( locale_fr_CA ) ;
String outputQuébec = localTime.format( formatterQuébec ) ;

System.out.println( outputQuébec ) ;

// US
Locale locale_en_US = Locale.US ; 
DateTimeFormatter formatterUS = DateTimeFormatter.ofLocalizedTime( FormatStyle.SHORT ).withLocale( locale_en_US ) ;
String outputUS = localTime.format( formatterUS ) ;

System.out.println( outputUS ) ;
</code></pre>

See this <a href="https://ideone.com/ZGZJkp" rel="noreferrer">code run live at IdeOne.com</a>. 

<blockquote>
 10 h 31
 
 10:31 AM
</blockquote>

Currently the time displayed as 13:35 PM 
However I want to display as 12 hour format with AM/PM, i.e 1:35 PM instead of 13:35 PM

The current code is as below 

<pre><code>private static final int FOR_HOURS = 3600000;
private static final int FOR_MIN = 60000;
public String getTime(final Model model) {
 SimpleDateFormat formatDate = new SimpleDateFormat("HH:mm a");
 formatDate.setTimeZone(userContext.getUser().getTimeZone());
 model.addAttribute("userCurrentTime", formatDate.format(new Date()));
 final String offsetHours = String.format("%+03d:%02d", userContext.getUser().getTimeZone().getRawOffset()
 / FOR_HOURS, Math.abs(userContext.getUser().getTimeZone().getRawOffset() % FOR_HOURS / FOR_MIN));
 model.addAttribute("offsetHours",
 offsetHours + " " + userContext.getUser().getTimeZone().getDisplayName(Locale.ROOT));
 return "systemclock";
}
</code></pre>

Display current time in 12 hour format with AM/PM

Android

当前时间显示为13:35 PM，但是我希望使用AM/PM显示为12小时格式，即1:35 PM而不是13:35 PM当前代码如下private static final int FOR_HOURS = 3600000;private static final int FOR_MIN = 60000;public Stri...

问使用AM/PM以12小时格式显示当前时间
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