Convert from MMDDYYYY to date java

Question

I have a string that is in the format of MMDDYYYY (ex. 01062014) and I wish to convert it to something like January 6, 2014. The code I currently have does not work and returns the default month (Something has gone wrong) and then 10, 6204.

String[] datesRaw = args[3].split("");
String[] dates = { datesRaw[0] + datesRaw[1], datesRaw[2] + datesRaw[3], datesRaw[4] + datesRaw[5] + datesRaw[6] + datesRaw[7] };
int[] numbers = new int[dates.length];
for (int i = 0; i < dates.length; i++) {
    numbers[i] = Integer.parseInt(dates[i]);
}
String month = "Something whent wrong";
switch (numbers[0]) {
    case 1:
        month = "January";
        break;
    case 2:
        month = "February";
        break;
    case 3:
        month = "March";
        break;
    case 4:
        month = "April";
        break;
    case 5:
        month = "May";
        break;
    case 6:
        month = "June";
        break;
    case 7:
        month = "July";
        break;
    case 8:
        month = "August";
        break;
    case 9:
        month = "September";
        break;
    case 10:
        month = "October";
        break;
    case 11:
        month = "November";
        break;
    case 12:
        month = "December";
        break;
}
fileName = month + " " + dates[1] + ", " + dates[2];

If that is the problem then how should I fix it? Code example maybe? — user2628615, Jan 07 '14 at 01:06

Dawood ibn Kareem · Accepted Answer · 2014-01-07T01:21:28.883

2

Use two SimpleDateFormat objects - one to parse the initial String into a Date, and the other to format the resulting Date into a String.

public String convert(String inputString) {
    SimpleDateFormat inputFormat = new SimpleDateFormat("MMddyyyy");
    SimpleDateFormat outputFormat = new SimpleDateFormat("MMMM d, yyyy");
    Date theDate = inputFormat.parse(inputString);
    return outputFormat.format(theDate);
}

You would probably want to create those two SimpleDateFormat objects as constants inside the class that has this method, but be aware that such an approach would make this method not thread safe.

edited Jan 07 '14 at 01:21

answered Jan 07 '14 at 01:15

Dawood ibn Kareem

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Should be "MMMM dd, yyyy" – Allan Macmillan Jan 07 '14 at 01:26
No @Allan, it shouldn't. OP asked for `January 6, 2014`. – Dawood ibn Kareem Jan 07 '14 at 01:27

score 0 · Answer 2 · edited May 23 '17 at 12:03

0

The way you went with is not the right way. It would be way better to convert the digits string into Date object and then use the print format to print it as you like.

This answer can help you

edited May 23 '17 at 12:03

Community

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answered Jan 07 '14 at 01:10

nheimann1

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sasankad · Answer 3 · 2014-01-07T02:22:50.527

0

String date = "01062014";
DateFormat ft = new SimpleDateFormat("MMddyyyy");
DateFormat ft1 = new SimpleDateFormat("MMMM dd, yyyy");


System.out.println(ft1.format((Date)ft.parse(date)));

edited Jan 07 '14 at 02:22

answered Jan 07 '14 at 01:17

sasankad

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`("ddMMyyyy")` supposed to be `("MMddyyyy")` because in `"01062014"`, `01` is month – Baby Jan 07 '14 at 01:22
@RafaEl, Thanks for pointing that out. I just read the numerical value without looking at OP dateformat. my bad – sasankad Jan 07 '14 at 02:22

Convert from MMDDYYYY to date java

3 Answers3