Datetime comparison [_datetime_comparison]

Use either two numeric datetimes or two complex datetimes to do a datetime comparison. Use standard comparison operators to compare two numeric datetimes of the same time unit such as milliseconds. For complex datetimes there is often a method or another complex type (object) available to do the comparison.

Datetime comparison examples [_datetime_comparison_examples]

• Perform a greater than comparison of two numeric datetimes in milliseconds:

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  long timestamp1 = 434931327000L;
  long timestamp2 = 434931330000L;
  
  if (timestamp1 > timestamp2) {
     // handle condition
  }
  

• Perform an equality comparison of two complex datetimes:

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  ZonedDateTime zdt1 =
          ZonedDateTime.of(1983, 10, 13, 22, 15, 30, 0, ZoneId.of('Z'));
  ZonedDateTime zdt2 =
          ZonedDateTime.of(1983, 10, 13, 22, 15, 30, 0, ZoneId.of('Z'));
  
  if (zdt1.equals(zdt2)) {
      // handle condition
  }
  

• Perform a less than comparison of two complex datetimes:

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  ZonedDateTime zdt1 =
          ZonedDateTime.of(1983, 10, 13, 22, 15, 30, 0, ZoneId.of('Z'));
  ZonedDateTime zdt2 =
          ZonedDateTime.of(1983, 10, 17, 22, 15, 35, 0, ZoneId.of('Z'));
  
  if (zdt1.isBefore(zdt2)) {
      // handle condition
  }
  

• Perform a greater than comparison of two complex datetimes

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  ZonedDateTime zdt1 =
          ZonedDateTime.of(1983, 10, 13, 22, 15, 30, 0, ZoneId.of('Z'));
  ZonedDateTime zdt2 =
          ZonedDateTime.of(1983, 10, 17, 22, 15, 35, 0, ZoneId.of('Z'));
  
  if (zdt1.isAfter(zdt2)) {
      // handle condition
  }