Android : Error Simpledateformat Unknown Pattern Character 'u'

I use java 1.7.25 but found this error. what should I do? FATAL EXCEPTION: main java.lang.IllegalArgumentException: Unknown pattern character 'u' at java.text.SimpleDateFor

Solution 1:

I use java 1.7.25

No, you don't - not if you're running on Android. You need to look at the Android documentation, not the Java 7 docs.

If you look at the Android SimpleDateFormat documentation you'll see that u isn't listed there. I don't believe there's a format pattern character for "day of week as a number" in Android.

Were you really looking for that though? If you just want the day of the week as a number (without anything else) you can always use

Stringtext = String.valueOf(calendar.get(Calendar.DAY_OF_WEEK));

Solution 2:

If you're using android, then you're not using Java 1.7.25. See the android documentation: there's no support for u in SimpleDateFormat.

Solution 3:

I'm guessing your problem is going to be in your TimeStampConverter class where you're passing in that "u" as the outputFormat. "u" is not a valid format character in SimpleDateFormat and you must be constructing a format string that contains it.

If you need to use the "u" as a literal, you'll need to enclose it in single quotes.