How to get Day, Month and Year from Date in Java

Given a date in the form of a string, the task is to write a Java Program to get the day, month, and year from the given date.

Examples:

Input: date = “2020-07-18”
Output:
Day: 18
Month: July
Year: 2020
Explanation: The given date is ‘2020-07-18’, so the day is: 18, the month is: July, and the year is: 2020.

Input: date = “2018-05-10”
Output:
Day: 10
Month: May
Year: 2018
Explanation: The given date is ‘2018-05-10’, so the day is: 10, the month is: May, and the year is: 2018.

Method 1: Using LocalDate class in Java:

• The idea is to use methods of LocalDate class to get the day, month, and year from the date.
• The getDayOfMonth() method returns the day represented by the given date, getMonth() method returns the month represented by the given date, and getYear() method returns the year represented by the given date.

Below is the implementation of the above approach:

Java

// Java program for the above approach
import java.util.Date;
import java.time.Month;
import java.time.LocalDate;

class GFG {

    // Function to get day, month, and
    // year from date
    public static void
    getDayMonthYear(String date)
    {

        // Get an instance of LocalTime
        // from date
        LocalDate currentDate
            = LocalDate.parse(date);

        // Get day from date
        int day = currentDate.getDayOfMonth();

        // Get month from date
        Month month = currentDate.getMonth();

        // Get year from date
        int year = currentDate.getYear();

        // Print the day, month, and year
        System.out.println("Day: " + day);
        System.out.println("Month: " + month);
        System.out.println("Year: " + year);
    }

    // Driver Code
    public static void main(String args[])
    {
        // Given Date
        String date = "2020-07-18";

        // Function Call
        getDayMonthYear(date);
    }
}

Output

Day: 18
Month: JULY
Year: 2020

Time Complexity: O(1), since the program has only one loop and it only executes one time, its time complexity is O(1).
Auxiliary Space: O(1), the program only uses constant space to store the variables, hence the space complexity is O(1).

Method 2: Using Calendar class in Java:

• The idea is to use get() method of Calendar class to get the day, month, and year from the date.
• The get() method takes one parameter of integer type and returns the value of the passed field from the given date.
• It returns the month index instead of the month name.

Below is the implementation of the above approach:

Java

// Java program for the above approach
import java.util.*;

class GFG {

    // Driver Code
    public static void main(String args[])
    {
        // Creating a calendar object
        Calendar cal
            = new GregorianCalendar(
                2020, 07, 18);

        // Getting the values of day,
        // month, and year from calendar
        // object
        int day = cal.get(Calendar.DAY_OF_MONTH);
        int month = cal.get(Calendar.MONTH);
        int year = cal.get(Calendar.YEAR);

        // Printing the day, month, and year
        System.out.println("Day: " + day);
        System.out.println("Month: " + month);
        System.out.println("Year: " + year);
    }
}

Output

Day: 18
Month: 7
Year: 2020

Time Complexity: O(1)
Auxiliary Space: O(1)
The time and space complexity of the above program is O(1) as it takes constant time and space to execute.

Method 3: Using String.split() in Java:

1. The idea is to use the split() method of String class.
2. It splits a string according to the pattern provided and returns an array of string.

Below is the implementation of the above approach:

Java

// Java program for the above approach
class GFG {

    // Function to get day, month, and
    // year from date
    public static void findDate(String date)
    {
        // Splitting the given date by '-'
        String dateParts[] = date.split("-");

        // Getting day, month, and year
        // from date
        String day = dateParts[0];
        String month = dateParts[1];
        String year = dateParts[2];

        // Printing the day, month, and year
        System.out.println("Day: " + day);
        System.out.println("Month: " + month);
        System.out.println("Year: " + year);
    }

    // Driver Code
    public static void
    main(String args[])
    {
        // Given date
        String date = "18-07-2020";

        findDate(date);
    }
}

Output

Day: 18
Month: 07
Year: 2020

By using “java.time package” we can get current date and time in very simple way:

Simple java program to Print current Date Month and Year using Calendar-

Java

import java.util.Calendar;

class Easy

{

 public static void main(String[] args)

 {

     Calendar cal=Calendar.getInstance();

     System.out.println("Current Date:"+cal.get(Calendar.DATE));

     System.out.println("Current Month:"+(cal.get(Calendar.MONTH)+1));

     System.out.println("Current Year:"+cal.get(Calendar.YEAR));

 }

}

Output

Current Date:22
Current Month:1
Current Year:2023

 Time Complexity: O(1), As there is no loop or recursive function call present, the time complexity of the above program is O(1).
Auxiliary Space: O(1), As no new data structure is used, the space complexity of the program is O(1).