How to compare two dates along with time in java

Question

I have two Date objects with the below format   SimpleDateFormat sdf   new SimpleDateFormat  yyyy-MM-dd T HH mm ss    String matchDateTime   sdf parse  2014-01-16T10 25 00    Date matchDateTime   null   try       matchDateTime   sdf parse newMatchDateTimeString     catch  ParseException e           TODO Auto-generated catch block     e printStackTrace          get the current date Date currenthDateTime   null  DateFormat dateFormat   new SimpleDateFormat  yyyy-MM-dd T HH mm ss    Date dt   new Date    String currentDateTimeString   dateFormat format dt   Log v  CCCCCurrent DDDate String is         currentDateTimeString    try                          currenthDateTime   sdf parse currentDateTimeString     catch  ParseException e           TODO Auto-generated catch block      e printStackTrace        Now  I want to compare the above two dates along with time   How should I compare in Java   Thanks

User · Answer

An alternative is Joda-Time   Use DateTime  DateTime date   new DateTime new Date     date isBeforeNow    or date isAfterNow

User · Answer

An Alternative is      Convert both dates into milliseconds as below  Date d   new Date    long l   d getTime      Now compare both long values

User · Answer

Use compareTo    Return Values  0 if the argument Date is equal to this Date  a value less than 0 if this Date is before the Date argument  and a value greater than 0 if this Date is after the Date argument   Like  if date1 compareTo date2  gt 0

User · Answer

The other answers are generally correct and all outdated  Do use java time  the modern Java date and time API  for your date and time work  With java time your job has also become a lot easier compared to the situation when this question was asked in February 2014       String dateTimeString    2014-01-16T10 25 00       LocalDateTime dateTime   LocalDateTime parse dateTimeString       LocalDateTime now   LocalDateTime now ZoneId systemDefault          if  dateTime isBefore now             System out println dateTimeString     is in the past          else if  dateTime isAfter now             System out println dateTimeString     is in the future          else           System out println dateTimeString     is now            When running in 2020 output from this snippet is      2014-01-16T10 25 00 is in the past   Since your string doesn   t inform of us any time zone or UTC offset  we need to know what was understood  The code above uses the device    time zone setting  For a known time zone use like for example ZoneId of  Asia Ulaanbaatar    For UTC specify ZoneOffset UTC   I am exploiting the fact that your string is in ISO 8601 format  The classes of java time parse the most common ISO 8601 variants without us having to give any formatter   Question  For Android development doesn   t java time require Android API level 26   java time works nicely on both older and newer Android devices  It just requires at least Java 6    In Java 8 and later and on newer Android devices  from API level 26  the modern API comes built-in  In non-Android Java 6 and 7 get the ThreeTen Backport  the backport of the modern classes  ThreeTen for JSR 310  see the links at the bottom   On  older  Android use the Android edition of ThreeTen Backport  It   s called ThreeTenABP  And make sure you import the date and time classes from org threeten bp with subpackages    Links   Oracle tutorial  Date Time explaining how to use java time  Java Specification Request  JSR  310  where java time was first described  ThreeTen Backport project  the backport of java time to Java 6 and 7  ThreeTen for JSR-310   ThreeTenABP  Android edition of ThreeTen Backport Question  How to use ThreeTenABP in Android Project  with a very thorough explanation  Wikipedia article  ISO 8601

User · Answer

Since Date implements Comparable lt Date gt   it is as easy as   date1 compareTo date2     As the Comparable contract stipulates  it will return a negative integer zero positive integer if date1 is considered less than the same as greater than date2 respectively  ie  before same after in this case    Note that Date has also  after   and  before   methods which will return booleans instead

User · Answer

Get calendar set to the current date and time Calendar cal   Calendar getInstance        Set time of calendar to 18 00 cal set Calendar HOUR OF DAY  18   cal set Calendar MINUTE  0   cal set Calendar SECOND  0   cal set Calendar MILLISECOND  0       Check if current time is after 18 00 today boolean afterSix   Calendar getInstance   after cal    if  afterSix        System out println  Go home  it s after 6 PM       else       System out println  Hello

[java] How to compare two dates along with time in java

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