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Java 8 - convert String to LocalDate

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Created by:
jonrsharpe
436

Short solution:

// solution 1
String strDate = "24/12/2019";
DateTimeFormatter formatter = DateTimeFormatter.ofPattern("dd/MM/yyyy");
LocalDate localDate = LocalDate.parse(strDate, formatter); // 2019-12-24

Below we have examples showing how we can convert string date in different formats to LocalDate. LocalDate class was introduced in Java 8.

1. Using DateTimeFormatter and LocalDate.parse()

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

public class Example1 {

    public static void main(String[] args) {
        String strDate = "24/12/2019";
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("dd/MM/yyyy");
        LocalDate localDate = LocalDate.parse(strDate, formatter);
        System.out.println(localDate); // 2019-12-24
    }
}

2. Format - yyyy-mm-dd

String to LocalDate with date format yyyy-mm-dd - ISO_LOCAL_DATE

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

public class LocalDateExample1_ISO_LOCAL_DATE {

    public static void main(String[] args) {

        DateTimeFormatter formatter = DateTimeFormatter.ISO_LOCAL_DATE;
        String date = "2019-10-12";
        LocalDate localDate = LocalDate.parse(date, formatter);

        System.out.println(date);
        System.out.println(localDate);
        System.out.println(formatter.format(localDate));
    }
}

Output:

2019-10-12
2019-10-12
2019-10-12

3. Format - yyyymmdd

String to LocalDate with date format yyyymmdd - BASIC_ISO_DATE

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

public class LocalDateExample2_BASIC_ISO_DATE {

    public static void main(String[] args) {

        DateTimeFormatter formatter = DateTimeFormatter.BASIC_ISO_DATE;
        String date = "20191012";
        LocalDate localDate = LocalDate.parse(date, formatter);

        System.out.println(localDate);
        System.out.println(formatter.format(localDate));
    }
}

Output:

2019-10-12
20191012

4. Format - E, MMM dd yyyy

String to LocalDate with date format E, MMM dd yyyy

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

public class LocalDateExample3 {

    public static void main(String[] args) {

        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("E, MMM dd yyyy");
        String date = "Sat, Oct 12 2019";
        LocalDate localDate = LocalDate.parse(date, formatter);

        System.out.println(localDate);
        System.out.println(formatter.format(localDate));
    }
}

Output:

2019-10-12
Sat, Oct 12 2019

5. Format - EEEE, MMM dd yyyy

String to LocalDate with date format EEEE, MMM dd yyyy

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

public class LocalDateExample4 {

    public static void main(String[] args) {

        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("EEEE, MMM dd yyyy");
        String date = "Saturday, Oct 12 2019";
        LocalDate localDate = LocalDate.parse(date, formatter);

        System.out.println(localDate);
        System.out.println(formatter.format(localDate));
    }
}

Output:

2019-10-12
Saturday, Oct 12 2019

6. Format - yyyy/MM/dd

String to LocalDate with date format yyyy/MM/dd

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

public class LocalDateExample5 {

    public static void main(String[] args) {

        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy/MM/dd");
        String date = "2019/10/12";
        LocalDate localDate = LocalDate.parse(date, formatter);

        System.out.println(localDate);
        System.out.println(formatter.format(localDate));
    }
}

Output:

2019-10-12
2019/10/12

7. Format - yyyy-MM-dd

String to LocalDate with date format yyyy-MM-dd

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

public class LocalDateExample6 {

    public static void main(String[] args) {

        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd");
        String date = "2019-10-12";
        LocalDate localDate = LocalDate.parse(date, formatter);

        System.out.println(localDate);
        System.out.println(formatter.format(localDate));
    }
}

Output:

2019-10-12
2019-10-12

8. Format - yyyy-MM-dd

String to LocalDate with date format yyyy-MM-dd - DEFAULT - ISO_LOCAL_DATE

import java.time.LocalDate;

public class LocalDateExample7_DEFAULT {

    public static void main(String[] args) {

        // default - parsed using DateTimeFormatter.ISO_LOCAL_DATE
        // 2019-10-12
        String date = "2019-10-12";

        LocalDate localDate = LocalDate.parse(date);

        System.out.println("String date: ");
        System.out.println(date);

        System.out.println("LocalDate: ");
        System.out.println(localDate);
    }
}

Output:

String date: 
2019-10-12
LocalDate: 
2019-10-12

9. Format - yyyy-MM-dd

String to LocalDate with date format yyyy-MM-dd - ISO_DATE

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

public class LocalDateExample8_ISO_DATE {

    public static void main(String[] args) {

        DateTimeFormatter formatter = DateTimeFormatter.ISO_DATE;
        String date = "2019-10-12";
        LocalDate localDate = LocalDate.parse(date, formatter);

        System.out.println(localDate);
        System.out.println(formatter.format(localDate));
    }
}

Output:

2019-10-12
2019-10-12

10. Format - yyyy-MM-dd+hh:mm

String to LocalDate with date format yyyy-MM-dd+hh:mm - ISO_DATE with time zone

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

public class LocalDateExample9_ISO_DATE_WITH_ZONE {

    public static void main(String[] args) {

        DateTimeFormatter formatter = DateTimeFormatter.ISO_DATE;
        String date = "2019-10-12+01:00";
        LocalDate localDate = LocalDate.parse(date, formatter);

        System.out.println(localDate);
        System.out.println(formatter.format(localDate));
    }
}

Output:

2019-10-12
2019-10-12

11. String to LocalDate with 9 examples

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

public class ConvertStringToLocalDateExamples {

    public static void main(String[] args) {

        System.out.println("# Example 1");
        // default - parsed using DateTimeFormatter.ISO_LOCAL_DATE
        // 2019-10-12
        System.out.println(LocalDate.parse("2019-10-12"));

        System.out.println("# Example 2");
        // 2019-10-12
        System.out.println(LocalDate.parse("2019-10-12",
                DateTimeFormatter.ISO_LOCAL_DATE));

        System.out.println("# Example 3");
        // 2019-10-12
        System.out.println(LocalDate.parse("20191012",
                DateTimeFormatter.BASIC_ISO_DATE));

        System.out.println("# Example 4");
        // 2019-10-12
        System.out.println(LocalDate.parse("Sat, Oct 12 2019",
                DateTimeFormatter.ofPattern("E, MMM dd yyyy")));

        System.out.println("# Example 5");
        // 2019-10-12
        System.out.println(LocalDate.parse("Saturday, Oct 12 2019",
                DateTimeFormatter.ofPattern("EEEE, MMM dd yyyy")));

        System.out.println("# Example 6");
        // 2019-10-12
        System.out.println(LocalDate.parse("2019/10/12",
                DateTimeFormatter.ofPattern("yyyy/MM/dd")));

        System.out.println("# Example 7");
        // 2019-10-12
        System.out.println(LocalDate.parse("2019-10-12",
                DateTimeFormatter.ofPattern("yyyy-MM-dd")));

        System.out.println("# Example 8");
        // 2019-10-12
        System.out.println(LocalDate.parse("2019-10-12",
                DateTimeFormatter.ISO_DATE));

        System.out.println("# Example 9");
        // 2019-10-12
        System.out.println(LocalDate.parse("2019-10-12+01:00",
                DateTimeFormatter.ISO_DATE));
    }
}

Output:

# Example 1
2019-10-12
# Example 2
2019-10-12
# Example 3
2019-10-12
# Example 4
2019-10-12
# Example 5
2019-10-12
# Example 6
2019-10-12
# Example 7
2019-10-12
# Example 8
2019-10-12
# Example 9
2019-10-12

 

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