Time Formatting Parsing in Fortress

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

public class TimeFormattingParsing {
    public static void main(String[] args) {
        // Here's a basic example of formatting a time
        // according to ISO 8601, which is similar to RFC3339.
        ZonedDateTime now = ZonedDateTime.now();
        System.out.println(now.format(DateTimeFormatter.ISO_OFFSET_DATE_TIME));

        // Time parsing uses similar patterns as formatting.
        ZonedDateTime t1 = ZonedDateTime.parse("2012-11-01T22:08:41+00:00", DateTimeFormatter.ISO_OFFSET_DATE_TIME);
        System.out.println(t1);

        // DateTimeFormatter uses pattern-based layouts. You can use predefined
        // formatters or create custom ones. The patterns use letters to represent
        // different components of date and time.
        System.out.println(now.format(DateTimeFormatter.ofPattern("h:mma")));
        System.out.println(now.format(DateTimeFormatter.ofPattern("EEE MMM dd HH:mm:ss yyyy")));
        System.out.println(now.format(DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ss.SSSXXXXX")));

        DateTimeFormatter customFormatter = DateTimeFormatter.ofPattern("h mm a");
        LocalDateTime t2 = LocalDateTime.parse("8 41 PM", customFormatter);
        System.out.println(t2);

        // For purely numeric representations you can also
        // use String.format with the extracted components of the time value.
        System.out.printf("%d-%02d-%02dT%02d:%02d:%02d-00:00%n",
                now.getYear(), now.getMonthValue(), now.getDayOfMonth(),
                now.getHour(), now.getMinute(), now.getSecond());

        // parse will throw an exception on malformed input
        // explaining the parsing problem.
        try {
            DateTimeFormatter ansicFormatter = DateTimeFormatter.ofPattern("EEE MMM dd HH:mm:ss yyyy");
            LocalDateTime.parse("8:41PM", ansicFormatter);
        } catch (Exception e) {
            System.out.println(e.getMessage());
        }
    }
}

This Java code demonstrates time formatting and parsing, which is similar to the original example. Here are the key points:

Java uses java.time package for date and time operations, which is more modern and flexible than the older java.util.Date.
ZonedDateTime is used for times with time zones, similar to the original example’s use of time.Now().
Java’s DateTimeFormatter is used for formatting and parsing, similar to the original’s use of time.Format and time.Parse.
Java uses pattern-based layouts for formatting and parsing, similar to the original example. However, the exact syntax of the patterns is different.
Java throws exceptions for parsing errors, while the original returned an error value.
The String.format method is used for purely numeric representations, similar to the original’s use of fmt.Printf.

When running this program, you’ll see output similar to the original, with times formatted in various ways and an error message for the malformed input at the end.

Remember to compile and run the Java program with:

$ javac TimeFormattingParsing.java
$ java TimeFormattingParsing

This will display the formatted times and the parsing error, demonstrating Java’s capabilities for time formatting and parsing.

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