How Do I Convert a String to a Date in Java?

Abdul D.

—January 15, 2025

The ProblemThe Problem

You don’t know how to convert a String to a Date in Java.

The SolutionThe Solution

The recommended way to convert a String to a Date in Java is to use the DateTimeFormatter class from java.time. The DateTimeFormatter class is thread-safe, making it a better choice for multithreaded environments.

However, DateTimeFormatter requires Java version 8 or later. For older Java versions, you can use the SimpleDateFormat class from the java.text package.

Using DateTimeFormatterUsing DateTimeFormatter

Here’s an example that demonstrates how to convert a String to a LocalDate using the DateTimeFormatter class:

import java.time.LocalDate;
import java.time.format.DateTimeFormatter;

public class Main {
    public static void main(String[] args) {
        String dateString = "2024-10-09";
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd");
        LocalDate date = LocalDate.parse(dateString, formatter);
        System.out.println(date);
    }
}

This generates the following output:

2024-10-09

Using SimpleDateFormatUsing SimpleDateFormat

Here’s an example that demonstrates how to convert a String to a Date using the SimpleDateFormat class:

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;

class Main {
    public static void main(String[] args) {
        String dateString = "2024-10-09";
        SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");

        try {
            Date date = formatter.parse(dateString);
            System.out.println("Converted Date: " + date); 
        } catch (ParseException e) {
            System.out.println("Invalid date format");
        }
    }
}

This generates the following output:

Converted Date: Mon Oct 09 00:00:00 UTC 2024

In this example, SimpleDateFormat is used to define the format of the input string (yyyy-MM-dd). The parse() method attempts to convert the string into a Date object. If the input string doesn’t match the expected format, a ParseException is thrown.

Note: The SimpleDateFormat class is not thread-safe, so you should avoid sharing instances across multiple threads.

Choosing a Date FormatChoosing a Date Format

The SimpleDateFormat and DateTimeFormatter classes allow you to define custom date formats, such as:

• dd/MM/yyyy for dates like 09/10/2024
• MM-dd-yyyy HH:mm:ss for dates with times, like 10-09-2024 14:00:00

Ensure the format you provide matches the input string to avoid ParseException errors.

The table below provides an overview of the available format pattern symbols for the DateTimeFormatter class: