[java] Convert Java string to Time, NOT Date

I would like to convert a variable string to a Time type variable, not Date using Java. the string look like this 17:40

I tried using the code below but this instance is a date type variable not time

String fajr_prayertime  =       prayerTimes.get(0);
DateFormat formatter = new SimpleDateFormat("HH:mm");
fajr_begins = (Date)formatter.parse(fajr_prayertime);
System.out.println(" fajr time " + fajr_begins);

However Netbean complains that I should insert an exception as below;

DateFormat formatter = new SimpleDateFormat("HH:mm");
try {
fajr_begins = (Date)formatter.parse(fajr_prayertime);
} catch (ParseException ex) {
Logger.getLogger(JavaFXApplication4.class.getName()).log(Level.SEVERE, null, ex);
}
System.out.println(" fajr time " + fajr_begins);

Any idea how I can get the time out of the string above.

You might consider Joda Time or Java 8, which has a type called LocalTime specifically for a time of day without a date component.

Example code in Joda-Time 2.7/Java 8.

LocalTime t = LocalTime.parse( "17:40" ) ;

try...

 java.sql.Time.valueOf("10:30:54");

try {

    SimpleDateFormat format = new SimpleDateFormat("hh:mm a"); //if 24 hour format
    // or
    SimpleDateFormat format = new SimpleDateFormat("HH:mm"); // 12 hour format

    java.util.Date d1 =(java.util.Date)format.parse(your_Time);

    java.sql.Time ppstime = new java.sql.Time(d1.getTime());

} catch(Exception e) {

    Log.e("Exception is ", e.toString());
}

String to Time (using an arbitrary time):

String myTime = "10:00:00"; 
Time startingTime = new Time (myTime);

String to Time (using currentTime):

String currentTime = getCurrentTime(); 
Time startingTime = new Time (currentTime);

Time to String:

private String getCurrentTime() {    
    SimpleDateFormat dateFormat = new SimpleDateFormat("kkmmss");
    String currentTime = dateFormat.format(System.currentTimeMillis());
    return currentTime;
}

You might want to take a look at this example:

public static void main(String[] args) {

    String myTime = "10:30:54";
    SimpleDateFormat sdf = new SimpleDateFormat("hh:mm:ss");
    Date date = null;
    try {
        date = sdf.parse(myTime);
    } catch (ParseException e) {
        e.printStackTrace();
    }
    String formattedTime = sdf.format(date);

    System.out.println(formattedTime);

}

You can use the following code for changing the String value into the time equivalent:

 String str = "08:03:10 pm";
 DateFormat formatter = new SimpleDateFormat("hh:mm:ss a");
 Date date = (Date)formatter.parse(str);

Hope this helps you.

SimpleDateFormat simpleDateFormat = new SimpleDateFormat("HH:MM");
simpleDateFormat.format(fajr_prayertime);

Joda-Time & java.time

Both Joda-Time and java.time (new in Java 8) offer a LocalTime class to represent a time-of-day without any date or time zone.

Example code, identical code for both java.time and Joda-Time.

LocalTime localTime = new LocalTime( "14:40" );
LocalTime deadline = new LocalTime( "15:30" );
boolean meetsDeadline = localTime.isBefore( deadline );

About java.time

The java.time framework is built into Java 8 and later. These classes supplant the troublesome old legacy date-time classes such as java.util.Date, Calendar, & SimpleDateFormat.

To learn more, see the Oracle Tutorial. And search Stack Overflow for many examples and explanations. Specification is JSR 310.

The Joda-Time project, now in maintenance mode, advises migration to the java.time classes.

You may exchange java.time objects directly with your database. Use a JDBC driver compliant with JDBC 4.2 or later. No need for strings, no need for java.sql.* classes. Hibernate 5 & JPA 2.2 support java.time.

Where to obtain the java.time classes?

• Java SE 8, Java SE 9, Java SE 10, Java SE 11, and later - Part of the standard Java API with a bundled implementation.
  • Java 9 adds some minor features and fixes.
• Java SE 6 and Java SE 7
  • Most of the java.time functionality is back-ported to Java 6 & 7 in ThreeTen-Backport.
• Android
  • Later versions of Android bundle implementations of the java.time classes.
  • For earlier Android (<26), the ThreeTenABP project adapts ThreeTen-Backport (mentioned above). See How to use ThreeTenABP….