Example 1: Convert String to Date using predefined formatters

1. import java.time.LocalDate;
2. import java.time.format.DateTimeFormatter;
4. public class TimeString {
6. public static void main(String[] args) {
7. // Format y-M-d or yyyy-MM-d
8. String string = "2017-07-25";
9. LocalDate date = LocalDate.parse(string, DateTimeFormatter.ISO_DATE);
11. System.out.println(date);
12. }
13. }

When you run the program, the output will be:

2017-07-25

In the above program, we’ve used the predefined formatter ISO_DATE that takes date string in the format 2017-07-25 or 2017-07-25+05:45′.

The LocalDate’s parse() function parses the given string using the given formatter. You can also remove the ISO_DATE formatter in the above example and replace the parse() method with:

LocalDate date = LocalDate.parse(string, DateTimeFormatter);

Example 2: Convert String to Date using pattern formatters

1. import java.time.LocalDate;
2. import java.time.format.DateTimeFormatter;
3. import java.util.Locale;
5. public class TimeString {
7. public static void main(String[] args) {
8. String string = "July 25, 2017";
10. DateTimeFormatter formatter = DateTimeFormatter.ofPattern("MMMM d, yyyy", Locale.ENGLISH);
11. LocalDate date = LocalDate.parse(string, formatter);
13. System.out.println(date);
14. }
15. }

When you run the program, the output will be:

2017-07-25

In the above program, our date is in the format MMMM d, yyyy. So, we create a formatter of the given pattern.

Now, we can parse the date using LocalDate.parse() function and get the LocalDate object.