Contents of page :
- Program 1) Using Date.before(), Date.after() and Date.equals() methods for date comparisons
- Program 2) Using Calendar's before(), after() and equals() methods for date comparisons
- Program 3) Using Date.compareTo() methods for date comparisons
Program 1) Using Date.before(), Date.after() and Date.equals() methods for date comparisons
import java.util.Date;
import java.text.ParseException;
import java.text.SimpleDateFormat;
//Using Date.before(), Date.after() and Date.equals()
/** Copyright (c), AnkitMittal JavaMadeSoEasy.com */
public class DateTest {
public static void main(String... args) throws ParseException {
SimpleDateFormat sdf = new SimpleDateFormat("dd-MM-yyyy");
Date date1 = sdf.parse("21-03-2016");
Date date2 = sdf.parse("29-08-2016");
if (date1.after(date2)) {
System.out.println("date1 is after date2");
}
if (date1.before(date2)) {
System.out.println("date1 is before date2");
}
if (date1.equals(date2)) {
System.out.println("date1 is equal to date2");
} else
System.out.println("date1 is NOT equal to date2");
System.out.println("\n---Now, let's test equals method by making date1 and date2 equal--");
date1 = sdf.parse("21-03-2016");
date2 = sdf.parse("21-03-2016");
if (date1.equals(date2)) {
System.out.println("date1 is equal to date2");
} else {
System.out.println("date1 is NOT equal to date2");
}
}
}
/*OUTPUT
date1 is before date2
date1 is NOT equal to date2
---Now, let's test equals method by making date1 and date2 equal--
date1 is equal to date2
*/
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Program 2) Using Calendar's before(), after() and equals() methods for date comparisons
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.text.ParseException;
import java.text.SimpleDateFormat;
//Using Calendar's before(), after() and equals() methods
/** Copyright (c), AnkitMittal JavaMadeSoEasy.com */
public class DateTest {
public static void main(String... args) throws ParseException {
SimpleDateFormat sdf = new SimpleDateFormat("dd-MM-yyyy");
Date date1 = sdf.parse("21-03-2016");
Date date2 = sdf.parse("29-08-2016");
Calendar calendar1=new GregorianCalendar();
Calendar calendar2=new GregorianCalendar();
calendar1.setTime(date1);
calendar2.setTime(date2);
if (calendar1.after(calendar2)) {
System.out.println("calendar1 is after calendar2");
}
if (calendar1.before(calendar2)) {
System.out.println("calendar1 is before calendar2");
}
if (date1.equals(date2)) {
System.out.println("calendar1 is equal to calendar2");
} else
System.out.println("calendar1 is NOT equal to calendar2");
}
}
/*OUTPUT
calendar1 is before calendar2
calendar1 is NOT equal to calendar2
*/
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Program 3) Using Date.compareTo() methods for date comparisons
package date_f3_compare__date_compare;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
//Using Date.compareTo() method
/** Copyright (c), AnkitMittal JavaMadeSoEasy.com */
public class DateTest {
public static void main(String... args) throws ParseException {
//if date1 is before date2 - than method returns -1
//if date1 is equal to date2 - than method returns 0
//if date1 is after date2 - than method returns 1
SimpleDateFormat sdf = new SimpleDateFormat("dd-MM-yyyy");
Date date1 = sdf.parse("21-03-2016");
Date date2 = sdf.parse("29-08-2016");
// date1 is before date2 - so, method will return -1 and we won't enter below if.
if (date1.compareTo(date2) > 0) {
System.out.println("date1 is after date2");
}
// date1 is before date2 - so, method will return -1 and enter below if.
if (date1.compareTo(date2) < 0) {
System.out.println("date1 is before date2");
}
// date1 is before date2 - so, method will return -1
//and we won't enter below if, we'll enter else.
if (date1.compareTo(date2) == 0) {
System.out.println("date1 is equal to date2");
} else {
System.out.println("date1 is NOT equal to date2");
}
}
}
/*OUTPUT
date1 is before date2
date1 is NOT equal to date2
*/
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RELATED LINKS>
Convert Calendar and GregorianCalendar to Date | Convert Date to Calendar and GregorianCalendar in java
Convert Date to String>
Using SimpleDateFormat to convert Date to String - use dd-MM-yyyy and dd-MM-yyyy hh:mm:ss format
Labels:
Core Java
Date tutorials