DateFormat format(Date obj) method in Java

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The format() method of DateFormat class in Java is used to format a given Date object into a string representing Date/Time.
Syntax:

String format(Date date)

Parameters: This method accepts a single parameter date which is a Date object.
Return Value: This method returns a String which is the formatted date-time value of the Date object passed as a parameter to the method.

The below programs illustrate the above method:

Program 1:

Java

// Java program to illustrate the
// format() method
 
import java.text.DateFormat;
import java.util.Date;
 
public class GFG {
    public static void main(String[] args)
    {
        // Create a Date instance
        Date currentDate = new Date();
 
        // Create a DateFormat instance and format
        // current Date
        String dateToStr = DateFormat.getInstance()
                               .format(currentDate);
 
        System.out.println("Formatted Date String: "
                           + dateToStr);
    }
}

Output:

Formatted Date String: 2/27/19 3:31 PM

Time complexity: O(1)
Auxiliary space: O(1)

Program 2:

Java

// Java program to illustrate the
// format() method
 
import java.text.DateFormat;
import java.util.*;
 
public class GFG {
    public static void main(String[] args)
    {
        // Create a Date instance
        Date date = new Date(2323223232L);
 
        // Create a DateFormat instance and format
        // the specified Date
        String dateToStr = DateFormat.getInstance()
                               .format(date);
 
        System.out.println("Formatted Date String: "
                           + dateToStr);
    }
}