object time is not a member of package org.joda

Question

I am learning scala follow this tutorial with docker image hseeberger/scala-sbt

with first version of build.sbt

libraryDependencies += "joda-time" % "joda-time" % "2.10.2"

everything is OK.

this piece of code (snippet_1)

import org.joda.time._
var dt = new DateTime

got what I want.

with second version of build.sbt

libraryDependencies ++= Seq{
    "joda-time" % "joda-time" % "2.10.2";
    "org.joda" % "joda-convert" % "2.2.1"
}

snippet_1 got this error

<console>:7: error: object time is not a member of package org.joda
       import org.joda.time._
                       ^

the only difference from that tutorial is that I replaced , with ; in the build.sbt as , causes error.

this command comes from this post

sbt eclipse

causes this error

[warn] Executing in batch mode.
[warn]   For better performance, hit [ENTER] to switch to interactive mode, or
[warn]   consider launching sbt without any commands, or explicitly passing 'shell'
[info] Loading project definition from /root/project
[info] Set current project to root (in build file:/root/)
[error] Not a valid command: eclipse (similar: help, alias)
[error] Not a valid project ID: eclipse
[error] Expected ':' (if selecting a configuration)
[error] Not a valid key: eclipse (similar: deliver, licenses, clean)
[error] eclipse
[error]        ^

any ideas?

Astrid · Accepted Answer · 2019-06-20T12:00:39.217

The problem is this:

Seq{
    "joda-time" % "joda-time" % "2.10.2";
    "org.joda" % "joda-convert" % "2.2.1"
}

Curly brackets mean you're passing Seq a single argument in the form of a code block. The value of a code block is always the value of the last line in the block - in this case, "org.joda" % "joda-convert" % "2.2.1". The joda-time dependency is never added.

You can fix this by using round brackets and commas to supply multiple arguments to Seq:

Seq(
    "joda-time" % "joda-time" % "2.10.2", 
    "org.joda" % "joda-convert" % "2.2.1"
)

Of particular note:

the only difference from that tutorial is that I replaced , with ; in the build.sbt as , causes error.

; and , have entirely different meanings in Scala and are not interchangeable. If you find yourself needing to make that replacement, you should stop and check what you're doing.

object time is not a member of package org.joda

1 Answers1