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Comparing Date using Date.before() and Date.after() Methods in Java

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mahmoud2506
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2022-05-06
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Comparing Date using Date.before() and Date.after() Methods in Java

 

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mahmoud2506
2022-05-06
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1) Date1.before(Date2) Method

It returns true if Date1 is less that Date2.

2) Date1.after(Date2) Method

It returns true if Date1 is greater than Date2.

Consider the program:

// Java program to compare date using 
// before() and after() method

import java.text.SimpleDateFormat;
import java.util.*;

public class p22 {
  public static void main(String args[]) {
    try {
      //define date format to take input
      SimpleDateFormat dateF = new SimpleDateFormat("dd/MM/yyyy");

      Scanner sc = new Scanner(System.in); //string object
      String dtString1 = "", dtString2 = "";

      System.out.print("Enter first date in dd/MM/yyyy format:");
      dtString1 = sc.nextLine();
      System.out.print("Enter second date in dd/MM/yyyy format:");
      dtString2 = sc.nextLine();

      //convert input date string into Date
      Date dt1 = dateF.parse(dtString1);
      Date dt2 = dateF.parse(dtString2);

      System.out.println("First Date is: " + dt1.toString());
      System.out.println("Second Date is: " + dt2.toString());

      if (dt1.after(dt2)) {
        System.out.println(dt1.toString() + " is greater than " + dt2.toString());
      } else if (dt1.before(dt2)) {
        System.out.println(dt1.toString() + " is less than " + dt2.toString());
      } else {
        System.out.println(dt1.toString() + " is equal to " + dt2.toString());
      }
    } catch (Exception e) {
      System.out.println("Exception is: " + e.toString());
    }
  }
}

Output

First Run:
Enter first date in dd/MM/yyyy format:21/08/2009
Enter second date in dd/MM/yyyy format:21/09/2008
First Date is: Fri Aug 21 00:00:00 IST 2009
Second Date is: Sun Sep 21 00:00:00 IST 2008
Fri Aug 21 00:00:00 IST 2009 is greater than Sun Sep 21 00:00:00 IST 2008

Second Run:
Enter first date in dd/MM/yyyy format:21/08/2008
Enter second date in dd/MM/yyyy format:21/08/2009
First Date is: Thu Aug 21 00:00:00 IST 2008
Second Date is: Fri Aug 21 00:00:00 IST 2009
Thu Aug 21 00:00:00 IST 2008 is less than Fri Aug 21 00:00:00 IST 2009

Third Run:
Enter first date in dd/MM/yyyy format:21/08/2008
Enter second date in dd/MM/yyyy format:21/08/2008
First Date is: Thu Aug 21 00:00:00 IST 2008
Second Date is: Thu Aug 21 00:00:00 IST 2008
Thu Aug 21 00:00:00 IST 2008 is equal to Thu Aug 21 00:00:00 IST 2008

 

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