What is this

Since I read toString of java \ .time \ .LocalTime, I will write an example of using DateTimeFormatter as a memorandum.

It's just a memo writing.

code

Since slf4j is used for log output, pay attention to the dependency when actually running it.

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

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

public class App {

    private static final Logger logger = LoggerFactory.getLogger(App.class);
    private static final DateTimeFormatter formatter = DateTimeFormatter.ofPattern("HH:mm:ss.SSS");
    private static final DateTimeFormatter formatter2 = DateTimeFormatter.ofPattern("yyyy/MM/dd HH:mm:ss.SSS");

    public static void main(String... args) {

        var time = LocalTime.now();
        logger.info(time.toString());
        logger.info(time.format(formatter));

        time = LocalTime.of(14,30);
        logger.info(time.toString());
        logger.info(time.format(formatter));

        logger.info("---------------------");

        var datetime = LocalDateTime.now();
        logger.info(datetime.toString());
        logger.info(datetime.format(formatter2));

        datetime = LocalDateTime.of(2018,8,16,10,55);
        logger.info(datetime.toString());
        logger.info(datetime.format(formatter2));
    }
}

Processing result

16:08:49.562 [main] INFO  App - 16:08:49.555999800
16:08:49.572 [main] INFO  App - 16:08:49.555
16:08:49.572 [main] INFO  App - 14:30
16:08:49.572 [main] INFO  App - 14:30:00.000
16:08:49.572 [main] INFO  App - ---------------------
16:08:49.572 [main] INFO  App - 2018-08-16T16:08:49.572009800
16:08:49.573 [main] INFO  App - 2018/08/16 16:08:49.572
16:08:49.573 [main] INFO  App - 2018-08-16T10:55
16:08:49.573 [main] INFO  App - 2018/08/16 10:55:00.000

Recommended Posts

Format the contents of LocalDate with DateTimeFormatter

Check the contents of params with pry

Verify the contents of the argument object with Mockito

Overwrite the contents of config with Spring-boot + JUnit5

Test the contents of an Excel file with JUnit

[Rails] Check the contents of the object

Replace the contents of the Jar file

[Ruby] Display the contents of variables

Check the contents of the Java certificate store

Memo: [Java] Check the contents of the directory

Prepare the format environment with "Rails" (VScode)