converting date from one format to another does not work

Question

I have a date with this format: Sun Oct 19 01:00:00 ADT 2014

and I need to convert it to the following format but I cannot,

Here is my code:

    // The test string
    String str = "Sun Oct 19 01:00:00 ADT 2014";

    // Formatter for the input date
    final DateTimeFormatter inputFormat = 
    DateTimeFormatter.ofPattern("EEE MMM dd HH:mm:ss zzz yyyy");

   // The parsed date
   final LocalDateTime parsed = LocalDateTime.parse(str, inputFormat);

       // The output format(s). Specify the one you need
    final DateTimeFormatter outputFormat1 = DateTimeFormatter.ofPattern("yyyy/MM/dd");
     final DateTimeFormatter outputFormat2 = DateTimeFormatter.ofPattern("yyyy-MM-dd");

  // Print
    System.out.println(outputFormat1.format(parsed)); // -> 2014/10/21
      System.out.println(outputFormat2.format(parsed)); // -> 2014-10-21

But it is not working at all and I am stuck with this from morning and really do not know how to solve it, Does anyone have any idea?

What exactly isn't working? What errors are you getting? What output are you getting, and what output are you expecting? — forgivenson, Jan 06 '15 at 19:26
Your input string is a fully specified point in time including time zone, so why do you use `LocalDateTime` for parsing? — isnot2bad, Jan 06 '15 at 19:28
You seem to be testing whether October 19, 2014 converts to 2014-10-21. The 19th of the month is not the 21st of the month. Also, as @forgivenson points out, you should probably be using a `ZonedDateTime` instead of a `LocalDateTime.` — David Conrad, Jan 06 '15 at 19:54
Here is the error that I get Exception in thread "main" java.time.DateTimeException: Unable to extract value: class java.time.LocalDateTime at java.time.format.DateTimePrintContext.getValue(DateTimePrintContext.java:282) at java.time.format.DateTimeFormatterBuilder$ZoneTextPrinterParser.format(DateTimeFormatterBuilder.java:3685) at java.time.format.DateTimeFormatterBuilder$CompositePrinterParser.format(DateTimeFormatterBuilder.java:2182) at java.time.format.DateTimeFormatter.formatTo(DateTimeFormatter.java:1744) at java.time.format.DateTimeFormatter.format(DateTimeFormatter.java:1718) — HMdeveloper, Jan 06 '15 at 19:57

score 1 · Accepted Answer · answered Jan 06 '15 at 19:57

What's wrong using this code. It works fine with 19-th

    // The test string
    String str = "Sun Oct 19 01:00:00 ADT 2014";

    // Formatter for the input date
    final DateFormat inputFormat = new SimpleDateFormat("EEE MMM dd HH:mm:ss zzz yyyy");
    // The parsed date
    final Date parsed = inputFormat.parse(str);

    // The output format(s). Specify the one you need
    final DateFormat outputFormat1 = new SimpleDateFormat("yyyy/MM/dd");
    final DateFormat outputFormat2 = new SimpleDateFormat("yyyy-MM-dd");

    // Print
    System.out.println(outputFormat1.format(parsed)); // -> 2014/10/21
    System.out.println(outputFormat2.format(parsed)); // -> 2014-10-21

score 1 · Answer 2 · answered Jan 06 '15 at 20:05

I hope you are using JDK8 and your imports are the following ones:

import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;

Then the following code :

import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;

public class Main {

    public static void main(String[] args) {
        // The test string
        String str = "Sun Oct 19 01:00:00 ADT 2014";

        // Formatter for the input date
        final DateTimeFormatter inputFormat =
                DateTimeFormatter.ofPattern("EEE MMM dd HH:mm:ss zzz yyyy");

        // The parsed date
        final LocalDateTime parsed = LocalDateTime.parse(str, inputFormat);

        // The output format(s). Specify the one you need
        final DateTimeFormatter outputFormat1 = DateTimeFormatter.ofPattern("yyyy/MM/dd");
        final DateTimeFormatter outputFormat2 = DateTimeFormatter.ofPattern("yyyy-MM-dd");

        // Print
        System.out.println(outputFormat1.format(parsed)); // -> 2014/10/21
        System.out.println(outputFormat2.format(parsed)); // -> 2014-10-21
    }
}

Prints as expected :

2014/10/19
2014-10-19

If you want to print 2014/10/21 just change the str to :

String str = "Tue Oct 21 01:00:00 ADT 2014";

converting date from one format to another does not work

2 Answers2

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