Properly use Java libraries in Scala

Question

I am learning Scala and I am unable to figure out how to properly use commands from Java libraries in Scala. I show below what am trying to do in a command-line.

collier@Nacho-Laptop:~$ scala
Welcome to Scala version 2.9.2 (OpenJDK 64-Bit Server VM, Java 1.7.0_25).
Type in expressions to have them evaluated.
Type :help for more information.

scala> import java.text._
import java.text._                                               ^


scala> println(java.text.DateFormat.getCalendar())
<console>:11: error: value getCalendar is not a member of object java.text.DateFormat
              println(java.text.DateFormat.getCalendar())
                                           ^

scala> println(java.text.getCalendar())
<console>:11: error: object getCalendar is not a member of package java.text
              println(java.text.getCalendar())
                                ^

scala> println(getCalendar())
<console>:11: error: not found: value getCalendar
              println(getCalendar())
                      ^

scala> getCalendar()
<console>:11: error: not found: value getCalendar
              getCalendar()
              ^

scala>

And because of that your problem lies not on the Scala side, but on the Java side. The equivalent Java code would also fail. — ziggystar
– ziggystar, Commented Jan 10, 2014 at 8:45

Reimeus · Accepted Answer · 2014-02-19 01:27:21Z

8

The REPL error messages clearly show that getCalendar is not defined for the DateFormat class. You can simply call Calendar#getInstance()

scala> import java.util.Calendar
import java.util.Calendar

scala> println(Calendar.getInstance().getTime())

edited Feb 19, 2014 at 1:27

answered Jan 9, 2014 at 22:34

Reimeus

160k16 gold badges225 silver badges282 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Mike Samuel · Accepted Answer · 2014-01-09 22:26:30Z

5

java.text.DateFormat.getCalendar()

will not work in Java because getCalendar is an instance method of DateFormat.

If you want to get a calendar try using Calendar.getInstance(Locale)

answered Jan 9, 2014 at 22:26

Mike Samuel

121k30 gold badges230 silver badges255 bronze badges

3 Comments

Devyn Collier Johnson Over a year ago

Thanks, but how would I do this in Scala? What do I import and how do I type this?

Dan W Over a year ago

import java.util.Calendar println(Calendar.getInstance)

Devyn Collier Johnson Over a year ago

@DanW thanks! Okay, I understand how to do this now.

Collectives™ on Stack Overflow

Properly use Java libraries in Scala

2 Answers 2

Comments

3 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

3 Comments

Your Answer

Sign up or log in

Post as a guest

Related