Write a Java program to print the first and last of given month

Write a Java program to print the first and last date of a given month. In this Java program example, we will see how to print the first and last date of a month. 

Sample Input

Enter the current date of the month for example 17/03/2022

Sample Output

First date: 01/03/2022

Last date: 31/03/2022

Algorithm to find first and last date of a month

• Take the current date input in the string and split the string “/”.
• Create two objects first for the print first date and another for the last date.
• Create an object and call the method that is Calendar.getInstance();.
• Convert string in integers and print appropriate first and last date.

Java program to print first and last date of a month

import java.text.SimpleDateFormat;
import java.time.LocalDate;
import java.util.Calendar;
public class Date {
 public static void main(String[] args) {
    String currentDate = "17/03/2022";//enter date here
    String[] splt = currentDate.split("/");
    LocalDate Fdate = LocalDate.of(Integer.parseInt(splt[2]), Integer.parseInt(splt[1]), Integer.parseInt(splt[0]))
   .plusDays(-(Integer.parseInt(splt[0]) - 1));
    System.out.println("first Date: " + Fdate);
    Calendar cal = Calendar.getInstance();
    cal.set(Integer.parseInt(splt[2]), (Integer.parseInt(splt[1])) - 1, Integer.parseInt(splt[0]));
    cal.set(Calendar.DAY_OF_MONTH, cal.getActualMaximum(Calendar.DAY_OF_MONTH));
    SimpleDateFormat ldate1 = new SimpleDateFormat("yyyy-MM-dd");
    String ldate = ldate1.format(cal.getTime());
    System.out.println("Last Date: " + ldate);
   }
 }

Explanation of this Java program

Step 1: Start.

Step 2: Create a class Date and main method.

Step 3: Take input in String and split it.

Step 4: Create an object and convert a string into integers and call plus method to add or subtract the days from the current date and print the first and last date.

Step 5:  Call Calendar.getInstance() method for the current date to print the last date of the month.

Step 6: Same as step 4.

Step 7: Print the last date of the month.

Step 8: End.

Output

first Date: 2022-03-01

Last Date: 2022-03-31

In this way, we learned how to write a Java program to print the first and last date of a month.