Compare two Calendar values

boolean after(Object when): Returns whether this Calendar represents a time after the time represented by the specified Object.
boolean before(Object when): Returns whether this Calendar represents a time before the time represented by the specified Object.
int compareTo(Calendar anotherCalendar): Compares the time values (millisecond offsets from the Epoch) represented by two Calendar objects.
boolean equals(Object obj): Compares this Calendar to the specified Object.

Compare date time using after method


import java.util.Calendar;

public class Main {
  public static void main(String[] args) {

    Calendar future = Calendar.getInstance();
    future.set(Calendar.YEAR, 3010);
    
    Calendar now = Calendar.getInstance();
    
    System.out.println("Is futureCal after now ? : " + future.after(now));
  }
}

The output:


Is futureCal after now ? : true

Compare date time using before method


import java.util.Calendar;

public class Main {
  public static void main(String[] args) {
    Calendar old = Calendar.getInstance();
    old.set(Calendar.YEAR, 1990);
 
    Calendar now = Calendar.getInstance();
    
    System.out.println("Is old before now ? : " + old.before(now));
  }
}

The output:


Is old before now ? : true

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