我想獲得字符串形式的時間之間的差異，但我得到的差異總是0，我正在對黑莓工作。如何獲取字符串形式的時間之間的差異
long startTime = HttpDateParser.parse("01:00:00");
System.out.println("start time is :" + startTime);
long endTime = HttpDateParser.parse("02:00:00");
System.out.println("end time is :" + endTime);
long diff = endTime - startTime;
long diffHours = diff/(60 * 60 * 1000);
如果要計算同一天兩次被格式化爲之間唯一的一次‘HH：MM：SS’，那麼它是非常容易
使用簡單HttpDateParser和採取具有正確的格式
像任何日期「星期二，2012年3月27日九時十一分37秒GMT」
在這裏，我們僅更換時間，那麼你將g ^等時間米莉兩次
String common="Tue, 27 Mar 2012 "; //09:11:37 GMT
String time1="1:50:10";
String time2="3:30:20";
long startTime = HttpDateParser.parse(common+time1+" GMT");
System.out.println("start time is :" + startTime);
long endTime = HttpDateParser.parse(common+time2+" GMT");
System.out.println("end time is :" + endTime);
long diff = endTime - startTime;
long hours=diff/(60*60*1000);
long minutes=(diff%(60*60*1000))/(60*1000);
long sec=((diff%(60*60*1000))%(60*1000))/1000;
String formateddate="";
if(hours<10)
{
formateddate="0"+hours;
}else{
formateddate=""+hours;
}
if(minutes<10)
{
formateddate=formateddate+":0"+minutes;
}else{
formateddate=formateddate+":"+minutes;
}
if(sec<10)
{
formateddate=formateddate+":0"+sec;
}else{
formateddate=formateddate+":"+sec;
}
System.out.println("Difference in Houres:"+formateddate);
我輸出
[0.0] start time is :1332813010000
[0.0] end time is :1332819020000
[0.0] Difference in Houres:01:40:10
之間。注意：如果你想不同的兩天 在這裏，你需要傳遞的日期格式應該是正確的像例如之間計算： 「YYYY-MM-DD HH：MM：SS」
在這裏，我提供了一些示例實施例
import java.util.Calendar;
import net.rim.device.api.i18n.SimpleDateFormat;
import net.rim.device.api.io.http.HttpDateParser;
import net.rim.device.api.ui.Field;
import net.rim.device.api.ui.FieldChangeListener;
import net.rim.device.api.ui.component.ButtonField;
import net.rim.device.api.ui.component.LabelField;
import net.rim.device.api.ui.container.MainScreen;
import net.rim.device.api.ui.picker.DateTimePicker;
public final class Screen1 extends MainScreen implements FieldChangeListener
{
/**
* Creates a new MyScreen object
*/
ButtonField date1;
ButtonField date2;
ButtonField button;
LabelField lbl;
DateTimePicker picker;
String str="";
Calendar cal;
public Screen1()
{
date1=new ButtonField("date1");
date1.setChangeListener(this);
add(date1);
date2=new ButtonField("date2");
date2.setChangeListener(this);
add(date2);
button = new ButtonField("Screen 1 ");
button.setChangeListener(this);
add(button);
lbl=new LabelField();
add(lbl);
}
public void fieldChanged(Field field, int context) {
if(field==button){//Tue, 27 Mar 2012 09:11:37 GMT
System.out.println(date1.getLabel().toString()+" "+date2.getLabel().toString());
long startTime = HttpDateParser.parse(date1.getLabel().toString());
System.out.println("start time is :" + startTime);
long endTime = HttpDateParser.parse(date2.getLabel().toString());
System.out.println("end time is :" + endTime);
long diff = endTime - startTime;
long hours=diff/(60*60*1000);
long minutes=(diff%(60*60*1000))/(60*1000);
long sec=((diff%(60*60*1000))%(60*1000))/1000;
String formateddate="";
if(hours<10)
{
formateddate="0"+hours;
}else{
formateddate=""+hours;
}
if(minutes<10)
{
formateddate=formateddate+":0"+minutes;
}else{
formateddate=formateddate+":"+minutes;
}
if(sec<10)
{
formateddate=formateddate+":0"+sec;
}else{
formateddate=formateddate+":"+sec;
}
System.out.println("Difference in Houres:"+formateddate);
lbl.setText("Time Between above dates is :"+formateddate);
}else if(field==date1)
{
date1.setLabel(getDateTimeFromPicker().toString());
}else if(field==date2)
{
date2.setLabel(getDateTimeFromPicker().toString());
}
}
private String getDateTimeFromPicker()
{
picker = DateTimePicker.createInstance(Calendar.getInstance(), "yyyy-MM-dd", "HH:mm:ss");
picker.doModal();
cal=picker.getDateTime();
str="";
if((cal.get(Calendar.MONTH)+1)<10)
str=str+cal.get(Calendar.YEAR)+"-"+"0"+(cal.get(Calendar.MONTH)+1);
else
str=str+cal.get(Calendar.YEAR)+"-"+(cal.get(Calendar.MONTH)+1);
if(cal.get(Calendar.DATE)<10)
str=str+"-"+"0"+cal.get(Calendar.DATE);
else
str=str+"-"+cal.get(Calendar.DATE);
if(cal.get(Calendar.HOUR_OF_DAY)<10)
str=str+" "+"0"+cal.get(Calendar.HOUR_OF_DAY);
else
str=str+" "+cal.get(Calendar.HOUR_OF_DAY);
if(cal.get(Calendar.MINUTE)<10)
str=str+":"+"0"+cal.get(Calendar.MINUTE);
else
str=str+":"+cal.get(Calendar.MINUTE);
if(cal.get(Calendar.SECOND)<10)
str=str+":"+"0"+cal.get(Calendar.SECOND);
else
str=str+":"+cal.get(Calendar.SECOND);
return str;
}
}
你可以看到在你的屏幕下面的輸出 
我想你所傳遞的字符串不是預期的格式。請參閱RIM BlackBerry API的link瞭解更多信息。
的格式的字符串應該是是否HttpDateParser只接受時間的這些
"Wdy, DD Mon YY"
"Wdy, DD Mon YYYY"
"Wdy, DD Mon YY HH:MM:SS"
"Wdy, DD Mon YY HH:MM:SS GMT"
"Wdy, DD Mon YY HH:MM:SS TZD"
"Wdy, DD Mon YY HHMMSS"
"Wdy, DD Mon YY HHMMSS GMT"
"Wdy, DD Mon YY HHMMSS TZD"
"Wdy, DD Mon YYYY HH:MM:SS"
"Wdy, DD Mon YYYY HH:MM:SS GMT"
"Wdy, DD Mon YYYY HH:MM:SS TZD"
"Wdy, DD Mon YYYY HHMMSS"
"Wdy, DD Mon YYYY HHMMSS GMT"
"Wdy, DD Mon YYYY HHMMSS TZD"
"Wdy, Mon DD YY HH:MM:SS"
"Wdy, Mon DD YY HH:MM:SS GMT"
"Wdy, Mon DD YY HH:MM:SS TZD"
"Wdy, Mon DD YY HHMMSS"
"Wdy, Mon DD YY HHMMSS GMT"
"Wdy, Mon DD YY HHMMSS TZD"
"Wdy, Mon DD YYYY HH:MM:SS"
"Wdy, Mon DD YYYY HH:MM:SS GMT"
"Wdy, Mon DD YYYY HH:MM:SS TZD"
"Wdy, Mon DD YYYY HHMMSS"
"Wdy, Mon DD YYYY HHMMSS GMT"
"Wdy, Mon DD YYYY HHMMSS TZD"
"Wdy, DD Mon YY, HH:MM:SS"
"Wdy, DD Mon YY, HH:MM:SS GMT"
"Wdy, DD Mon YY, HH:MM:SS TZD"
"Wdy, DD Mon YY, HHMMSS"
"Wdy, DD Mon YY, HHMMSS GMT"
"Wdy, DD Mon YY, HHMMSS TZD"
"Wdy, DD Mon YYYY, HH:MM:SS"
"Wdy, DD Mon YYYY, HH:MM:SS GMT"
"Wdy, DD Mon YYYY, HH:MM:SS TZD"
"Wdy, DD-Mon-YY HH:MM:SS"
"Wdy, DD-Mon-YY HH:MM:SS GMT"
"Wdy, DD-Mon-YY HH:MM:SS TZD"
"Wdy, DD-Mon-YY HHMMSS"
"Wdy, DD-Mon-YY HHMMSS GMT"
"Wdy, DD-Mon-YY HHMMSS TZD"
"Wdy, DD-Mon-YY, HH:MM:SS"
"Wdy, DD-Mon-YY, HH:MM:SS GMT"
"Wdy, DD-Mon-YY, HH:MM:SS TZD"
"Wdy, DD-Mon-YY, HHMMSS"
"Wdy, DD-Mon-YY, HHMMSS GMT"
"Wdy, DD-Mon-YY, HHMMSS TZD"
"Wdy, DD-Mon-YYYY HH:MM:SS"
"Wdy, DD-Mon-YYYY HH:MM:SS GMT"
"Wdy, DD-Mon-YYYY HH:MM:SS TZD"
"Wdy, DD-Mon-YYYY HHMMSS"
"Wdy, DD-Mon-YYYY HHMMSS GMT"
"Wdy, DD-Mon-YYYY HHMMSS TZD"
"Wdy, DD-Mon-YYYY, HH:MM:SS"
"Wdy, DD-Mon-YYYY, HH:MM:SS GMT"
"Wdy, DD-Mon-YYYY, HH:MM:SS TZD"
"Wdy, DD-Mon-YYYY, HHMMSS"
"Wdy, DD-Mon-YYYY, HHMMSS GMT"
"Wdy, DD-Mon-YYYY, HHMMSS TZD"
"Weekday, DD-Mon-YY HH:MM:SS"
"Weekday, DD-Mon-YY HH:MM:SS GMT"
"Weekday, DD-Mon-YY HH:MM:SS TZD"
"Weekday, DD-Mon-YY HHMMSS"
"Weekday, DD-Mon-YY HHMMSS GMT"
"Weekday, DD-Mon-YY HHMMSS GMT"
"Weekday, DD-Mon-YYYY HH:MM:SS"
"Weekday, DD-Mon-YYYY HH:MM:SS GMT"
"Weekday, DD-Mon-YYYY HH:MM:SS TZD"
"Weekday, DD-Mon-YYYY HHMMSS"
"Weekday, DD-Mon-YYYY HHMMSS GMT"
"Weekday, DD-Mon-YYYY HHMMSS TZD"
"Wdy Mon DD HH:MM:SS YYYY"
"YYYY" (eg 1997)
"YYYY-MM" (eg 1997-07)
"YYYY-MM-DD" (eg 1997-07-16)
"YYYY-MM-DDThh:mmTZD" (eg 1997-07-16T19:20+01:00)
"YYYY-MM-DDThh:mm:ssTZD" (eg 1997-07-16T19:20:30+01:00)
"YYYY-MM-DDThh:mm:ss.sTZD" (eg 1997-07-16T19:20:30.45+01:00)
對不起它HH：MM：SS只 – user1195292 2012-03-27 10:57:05
NO。檢查y更新的答案。 – 2012-03-27 11:02:20
任何一個？ 根據http://www.blackberry.com/developers/docs/6.0.0api/net/rim/device/api/io/http/HttpDateParser.html#parse%28java.lang.String%29它也應該有日期。 因此，如果您確實需要使用此課程，可能需要快速修復，請將「1:00:00」更改爲「2010-10-10T01：00：00」和「2:00:00」更改爲「2010-10- 10T02：00：00"
2010-10-10T01：00：00這裏2010-10-10代表什麼？ – user1195292 2012-03-27 10:56:41
感謝它工作:) – user1195292 2012-03-27 11:39:50