Examples of java.text.DateFormat

java.text.DateFormat
DateFormat is an abstract class for date/time formatting subclasses which formats and parses dates or time in a language-independent manner. The date/time formatting subclass, such as SimpleDateFormat, allows for formatting (i.e., date -> text), parsing (text -> date), and normalization. The date is represented as a Date object or as the milliseconds since January 1, 1970, 00:00:00 GMT.
DateFormat provides many class methods for obtaining default date/time formatters based on the default or a given locale and a number of formatting styles. The formatting styles include FULL, LONG, MEDIUM, and SHORT. More detail and examples of using these styles are provided in the method descriptions.
DateFormat helps you to format and parse dates for any locale. Your code can be completely independent of the locale conventions for months, days of the week, or even the calendar format: lunar vs. solar.
To format a date for the current Locale, use one of the static factory methods:
```
 myString = DateFormat.getDateInstance().format(myDate); 
```
If you are formatting multiple dates, it is more efficient to get the format and use it multiple times so that the system doesn't have to fetch the information about the local language and country conventions multiple times.
```
 DateFormat df = DateFormat.getDateInstance(); for (int i = 0; i < myDate.length; ++i) { output.println(df.format(myDate[i]) + "; "); } 
```
To format a date for a different Locale, specify it in the call to getDateInstance().
```
 DateFormat df = DateFormat.getDateInstance(DateFormat.LONG, Locale.FRANCE); 
```
You can use a DateFormat to parse also.
```
 myDate = df.parse(myString); 
```
Use getDateInstance to get the normal date format for that country. There are other static factory methods available. Use getTimeInstance to get the time format for that country. Use getDateTimeInstance to get a date and time format. You can pass in different options to these factory methods to control the length of the result; from SHORT to MEDIUM to LONG to FULL. The exact result depends on the locale, but generally:
- SHORT is completely numeric, such as 12.13.52 or 3:30pm
- MEDIUM is longer, such as Jan 12, 1952
- LONG is longer, such as January 12, 1952 or 3:30:32pm
- FULL is pretty completely specified, such as Tuesday, April 12, 1952 AD or 3:30:42pm PST.
You can also set the time zone on the format if you wish. If you want even more control over the format or parsing, (or want to give your users more control), you can try casting the DateFormat you get from the factory methods to a SimpleDateFormat. This will work for the majority of countries; just remember to put it in a try block in case you encounter an unusual one.
You can also use forms of the parse and format methods with ParsePosition and FieldPosition to allow you to
- progressively parse through pieces of a string.
- align any particular field, or find out where it is for selection on the screen.
Synchronization

Date formats are not synchronized. It is recommended to create separate format instances for each thread. If multiple threads access a format concurrently, it must be synchronized externally. @see Format @see NumberFormat @see SimpleDateFormat @see java.util.Calendar @see java.util.GregorianCalendar @see java.util.TimeZone @version 1.57 11/17/05 @author Mark Davis, Chen-Lieh Huang, Alan Liu


  @Test
  public void testDateFormat_CustomMapType() throws Exception {
    // Test that date format works for mapping between String and Custom Map Type
    mapper = getMapper(new String[] { "mapMapping3.xml" });
    DateFormat df = new SimpleDateFormat("MM/dd/yyyy");
    String dateStr = "10/15/2005";
    CustomMap src = newInstance(CustomMap.class);
    src.putValue("fieldA", dateStr);


    org.dozer.vo.SimpleObj dest = mapper.map(src, org.dozer.vo.SimpleObj.class);
    assertNotNull("dest field should not be null", dest.getField5());
    assertEquals("dest field contains wrong date value", df.parse(dateStr), dest.getField5().getTime());


    CustomMap remappedSrc = mapper.map(dest, CustomMap.class);
    assertEquals("remapped src field contains wrong date string", dateStr, remappedSrc.getValue("fieldA"));
  }

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   */
  public ActionErrors validateDateString(String fieldLabel, String date, Locale locale, String errorKey, ActionErrors actionErrors)
  {
    Calendar calendar = new GregorianCalendar();
    calendar.setLenient(false);
    DateFormat df = DateFormat.getDateInstance(DateFormat.SHORT, locale);
    try {
      Date parsedDate = df.parse(date);
      calendar.setTime(parsedDate);
    } catch (ParseException e) {
      ActionMessage error = new ActionMessage(errorKey, messages.getMessage(fieldLabel));
      actionErrors.add(errorKey, error);
    } catch (Exception e) {

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      if (fieldValue != null) {
        fieldValue = fieldValue.trim();
      } else {
        isError = true;
      }
      DateFormat tf = DateFormat.getTimeInstance(DateFormat.SHORT, locale);
      tf.parse(fieldValue);
      isError = false;
    } catch (Exception e) {
      isError = true;
    }
    if (isError) {

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  public String  getDisplayString()
  {    
    System.out.println("In display Pure Time ** member string-----------------****");
    if ( memberValue != null )
    {
      DateFormat   df= new SimpleDateFormat("h:mm a"); 
      return df.format(memberValue);
    }else
    {
      return "";
    }
  }

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        ((Date)this.getMemberValue()).setMonth(greg.get(Calendar.MONTH));
        ((Date)this.getMemberValue()).setDate(greg.get(Calendar.DATE));
        ((Date)this.getMemberValue()).setHours(greg.get(Calendar.HOUR_OF_DAY));
        ((Date)this.getMemberValue()).setMinutes(greg.get(Calendar.MINUTE));


        DateFormat df = null;


        // When you set the applyDate to false then
        // it will only display the Date and it will not consider the Time
        if (applyDate)
        {
          df = new SimpleDateFormat(this.getDateFormat());
        }else{
          df = new SimpleDateFormat(this.onlyDateFormat);
        }
        return df.format(this.memberValue);
      }else{
        // if this is a timestamp, then just return a string representation
        return(memberValue.toString());
      }   // end if (! isTimestamp)
    }else{

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      noteForm.setTitle(noteVO.getTitle());
      noteForm.setDetail(noteVO.getDetail());
      noteForm.setCreatedid(String.valueOf(noteVO.getCreatedBy()));
      noteForm.setCreatedby(noteVO.getCreatedByVO().getFirstName() + " " + noteVO.getCreatedByVO().getLastName());


      DateFormat df = new SimpleDateFormat("MMM-dd-yyyy hh:mm:ss a");
      Timestamp createdTimestamp = noteVO.getCreatedOn();
      String createdDateString = "";
      if (createdTimestamp != null) {
        Date valueDate = new Date(createdTimestamp.getTime());
        createdDateString = df.format(valueDate);
      }
      noteForm.setCreateddate(createdDateString);


      Timestamp modifiedTimestamp = noteVO.getModifiedOn();
      String modyfiedDateString = "";
      if (modifiedTimestamp != null) {
        Date valueDate = new Date(modifiedTimestamp.getTime());
        modyfiedDateString = df.format(valueDate);
      }
      noteForm.setModifieddate(modyfiedDateString);


      if (noteVO.getRelateEntity() > 0) {
        noteForm.setEntityid(String.valueOf(noteVO.getRelateEntity()));

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        CvFileVO flvo = new CvFileVO();
        flvo.setTitle(fileName); //file name


        Calendar c = Calendar.getInstance();
        java.util.Date dt = c.getTime();
        DateFormat df = new SimpleDateFormat("MM_dd_yyyy_hh_mm_ss");
        String dateStamp = df.format(dt);


        flvo.setName("attachment_" + dateStamp +"_"+ fileName);
        flvo.setCreatedBy(userid);
        flvo.setOwner(userid);
        flvo.setAuthorId(userid);

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      // Format created time
      Timestamp timeStamp = catVO.getCreatedOn();
      if (timeStamp != null){
        Date d = new Date(timeStamp.getTime());
        DateFormat df = new SimpleDateFormat("MMM dd, yyyy hh:mm:ss a");
        catForm.setCreated(df.format(d));
      }
      
      // Format modified time
      timeStamp = catVO.getModifiedOn();
      if (timeStamp != null){
        Date d = new Date(timeStamp.getTime());
        DateFormat df = new SimpleDateFormat("MMM dd, yyyy hh:mm:ss a");
        catForm.setModified(df.format(d));
      }
      
      catForm.setOwner(catVO.getOwnerVO().getFirstName() + " "
        + catVO.getOwnerVO().getLastName());
      catForm.setOwnerid(new Integer(catVO.getCreatedBy()).toString());

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          ItemElement ie = new ItemElement();
          IntMember     InvoiceId = new IntMember("InvoiceId",invoiceID[i],'D',"",'T',false,20);
          String invNumStr = "";
          StringMember   InvoiceNum = new StringMember("InvoiceNum",invoiceNum[i],'D',"",'T',false);


          DateFormat   df = new SimpleDateFormat("yyyy-mm-dd") ;
          java.util.Date InvoiceDate = new java.util.Date();
          try{
            InvoiceDate = df.parse(invDateStr[i]) ;
          }
          catch (Exception e){
            e.printStackTrace();
          }
          DateMember invoiceDate = new DateMember ("Date",InvoiceDate,10,"",'T',false,1,"EST");

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            CvFolderVO homeFld = remoteFile.getHomeFolder(individualID);


            int rn = (new Random()).nextInt();
            Calendar c = Calendar.getInstance();
            java.util.Date dt = c.getTime();
            DateFormat df = new SimpleDateFormat("MM_dd_yyyy");
            String dateStamp = df.format(dt);


            CvFileVO flvo = new CvFileVO();
            flvo.setTitle("Print Template_" + rn);
            flvo.setName("Template_" + "_" + rn + "_" + dateStamp + ".html");
            Message[1] = "Template_" + "_" + rn + "_" + dateStamp + ".html";

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Examples of java.text.DateFormat

Synchronization

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