java - How to make JDatePicker text field formatted for input? -

org.jdatepicker used

in app input field should editable, added

    datepicker = new jdatepickerimpl(datepanel, new datelabelformatter());     datepicker.settexteditable(true); 

but can write bs it: screenshot. need add

    mf = new maskformatter("##.##.####");      mf .setplaceholdercharacter('.'); 

to limit input mask. how this? jdatepickerimpl isn't jformattedtextfield. when choose date calendar it's formatted right way. datelabelformatter class:

    public class datelabelformatter extends jformattedtextfield.abstractformatter {         private string datepattern = "dd.mm.yyyy";         private simpledateformat dateformatter = new simpledateformat(datepattern);      @override      public object stringtovalue(string text) throws parseexception {      return dateformatter.parseobject(text);       }     @override         public string valuetostring(object value) throws parseexception {             if (value != null) {                 calendar cal = (calendar) value;                 return dateformatter.format(cal.gettime());             }             return "";         }     } 

added: tried extract jformattedtextfield jdatepickerimpl , changed way:

     datepicker = new jdatepickerimpl(datepanel, new datelabelformatter());      datepicker.settexteditable(true);       maskformatter mf = new maskformatter("##.##.####");      mf.setvalidcharacters("1234567890");      mf.setplaceholdercharacter(' ');      jformattedtextfield textfield = datepicker.getjformattedtextfield();      textfield.setformatterfactory(new defaultformatterfactory(mf)); 

it looks like wanted now, seems else went wrong , it's not returning date now.

also tried change datelabelformatter class:

    public class datelabelformatter extends maskformatter {  private string datepattern = "dd.mm.yyyy"; private simpledateformat dateformatter = new simpledateformat(datepattern); public datelabelformatter() { // set mask , placeholder     try {         setmask("##.##.####");          setplaceholdercharacter('0');         setallowsinvalid(false);         setoverwritemode(true);     } catch (parseexception e) {         e.printstacktrace();     } } @override public object stringtovalue(string text) throws parseexception {     return dateformatter.parseobject(text); }  @override public string valuetostring(object value) throws parseexception {     if (value != null) {         calendar cal = (calendar) value;         return dateformatter.format(cal.gettime());     }      return dateformatter.format(calendar.date); } 

}

everything looks fine , partially works - when pick date calendar. when type date keyboard error:

exception in thread "awt-eventqueue-0" java.lang.classcastexception: java.util.date cannot cast java.util.calendar @ org.jdatepicker.impl.jdatepickerimpl$internaleventhandler.propertychange(jdatepickerimpl.java:247) @ java.beans.propertychangesupport.fire(propertychangesupport.java:335) @ java.beans.propertychangesupport.firepropertychange(propertychangesupport.java:328) @ java.beans.propertychangesupport.firepropertychange(propertychangesupport.java:263) @ java.awt.component.firepropertychange(component.java:8430) @ javax.swing.jformattedtextfield.setvalue(jformattedtextfield.java:798) @ javax.swing.jformattedtextfield.commitedit(jformattedtextfield.java:529) @ javax.swing.jformattedtextfield$focuslosthandler.run(jformattedtextfield.java:648) @ javax.swing.jformattedtextfield.processfocusevent(jformattedtextfield.java:630) @ java.awt.component.processevent(component.java:6291) @ java.awt.container.processevent(container.java:2236) @ java.awt.component.dispatcheventimpl(component.java:4891) @ java.awt.container.dispatcheventimpl(container.java:2294) @ java.awt.component.dispatchevent(component.java:4713) @ java.awt.keyboardfocusmanager.redispatchevent(keyboardfocusmanager.java:1954) @ java.awt.defaultkeyboardfocusmanager.typeaheadassertions(defaultkeyboardfocusmanager.java:995) @ java.awt.defaultkeyboardfocusmanager.dispatchevent(defaultkeyboardfocusmanager.java:661) @ java.awt.component.dispatcheventimpl(component.java:4762) @ java.awt.container.dispatcheventimpl(container.java:2294) @ java.awt.component.dispatchevent(component.java:4713) @ java.awt.eventqueue.dispatcheventimpl(eventqueue.java:758) @ java.awt.eventqueue.access$500(eventqueue.java:97) @ java.awt.eventqueue$3.run(eventqueue.java:709) @ java.awt.eventqueue$3.run(eventqueue.java:703) @ java.security.accesscontroller.doprivileged(native method) @ java.security.protectiondomain$javasecurityaccessimpl.dointersectionprivilege(protectiondomain.java:76) @ java.security.protectiondomain$javasecurityaccessimpl.dointersectionprivilege(protectiondomain.java:86) @ java.awt.eventqueue$4.run(eventqueue.java:731) @ java.awt.eventqueue$4.run(eventqueue.java:729) @ java.security.accesscontroller.doprivileged(native method) @ java.security.protectiondomain$javasecurityaccessimpl.dointersectionprivilege(protectiondomain.java:76) @ java.awt.eventqueue.dispatchevent(eventqueue.java:728) @ java.awt.eventdispatchthread.pumponeeventforfilters(eventdispatchthread.java:201) @ java.awt.eventdispatchthread.pumpeventsforfilter(eventdispatchthread.java:116) @ java.awt.eventdispatchthread.pumpeventsforhierarchy(eventdispatchthread.java:105) @ java.awt.eventdispatchthread.pumpevents(eventdispatchthread.java:101) @ java.awt.eventdispatchthread.pumpevents(eventdispatchthread.java:93) @ java.awt.eventdispatchthread.run(eventdispatchthread.java:82) 

i had same problem: seems stringtovalue() has return instance of calendar , not of date, symmetrically valuetostring() receives calendar input. correct code be:

public class datelabelformatter extends jformattedtextfield.abstractformatter {     private string datepattern = "dd.mm.yyyy";     private simpledateformat dateformatter = new simpledateformat(datepattern);      @override     public object stringtovalue(string text) throws parseexception {         calendar cal = calendar.getinstance();         cal.settime((date) dateformatter.parseobject(text));         return cal;     }      @override     public string valuetostring(object value) throws parseexception {         if (value != null) {             calendar cal = (calendar) value;             return dateformatter.format(cal.gettime());         }         return "";     } }