use java packages in databrick scala - java

I'm new to databrick and I'm just trying to copy my scala code to databrick notebook.
However, for the imports, everything is fine except
import org.apache.spark.util.LongAccumxulator
which is a package written in Java,
I know that scala can import java packages, so what is going wrong here?
The error message is:
notebook:11: error: object LongAccumxulator is not a member of package
org.apache.spark.util import org.apache.spark.util.LongAccumxulator
What is the reason for getting this error?

Related

Java import from other file

I'm a bit of a beginner in Java and I have an aissgnment to do and was given a code to edit.
Problem seems to be that there is an error in including the created packages. The import looks like this:
package de.cogmod.anns.exercisesheet01;
import java.util.Random;
import de.cogmod.anns.exercisesheet01.misc.LearningListener;
import de.cogmod.anns.exercisesheet01.misc.Tools;
with the folder structure being as the import statements declare it. However the following error message is shown when i try to compile it with javac on windows.
package de.cogmod.anns.exercisesheet01.misc does not exist
I guess there is a very simple solution to this but I just can't figure it out. Thank you very much!

I will not give you clear answer since this is an assignment. But here are some pointers.
javac works on a single class if not instructed to run recursively.
classpath is very important during compile time and runtime.

Getting Was expecting: <NAME> ... when importing java file in jython

I am quite new to jython. And in my project there is an existing jython file.
This jython file is referring to few java classes present in custom jar.
Here are the import statements
from oracle.ess import PrintVersion
from oracle.as.scheduler import CalendarWrapper
first import statement is not giving any error
but second import statement is giving error under as which is part of package name saying was expecting: NAME ...
One more thing both import statement are part of same jar, so I can not think of any classpath related issues.
So I am feeling like as is not allowed word as part of java package name.
Is there some thing like not allowed words in java package name while using them in jython.
Any kind of help will be appreciated.

as is a keyword, check it with keyword.iskeyword(s):
import keyword
keyword.iskeyword('as')
This makes it impossible to import any module named as.

JavaFX Import Error for javafx.builders package

I am learning JavaFX from Pro Java FX 2 book. I am trying to import javafx.builders.* package. but compiler keeps raising errors import cannot be resolved. but other packages javafx.* excepts javafx.builders.* imports successfully. I am using JavaSDK 7u51. I tried in eclipse with e(fx)clipse and Netbeans as well. Please help me to find solution.

There is no such package as javafx.builders. Each builder is (generally) in the package of the class it builds, for instance GroupBuilder is in javafx.scene, as:
import javafx.scene.GroupBuilder;

How to import my java class into another java class in Xpages java

In my Xpage, I have added to Java classes. One is "AUser" declared in Models package and one is "AUserRepository" declared in a Repository package.
When I try and import AUser into a class in my AUserRepository... the import statement I type in is not working.
import com.Discussion.utils.AUser;
Weird thing is, If I exit out of Notes and load up eclipse standalone, and make the same kind of stuff, the import works fine. Am I missing out some important factor in Xpages?
The problem definitely is the import routing.

import Models.AUser;
import Repository.AUserRepository;

Is the project build path correct? Project - Properties - Java build path. Also, have you tried cleaning the project? Project - Clean....

import chat.server not found

When I develop an RMI server, I use:
import java.rmi.server.UnicastRemoteServer;
import java.rmi.server.StubSecurityManager;
import chat.server.*;
But when I compile the Java file, an error occurs that says:
Class java.rmi.server.UnicastRemoteServer not found in import. import
java.rmi.server.UnicastRemoteServer
and also error with StubSecurityManager. Please help me work out this problem.

It appears that you are using an old code written in JDK1.1 trying to compile using newer version of JDK.
You need to make following changes.
java.rmi.server.UnicastRemoteServer -> java.rmi.server.UnicastRemoteObject
java.rmi.server.StubSecurityManager -> java.rmi.RMISecurityManager
Source:
http://groups.google.com/group/comp.lang.java.api/browse_thread/thread/c768d6617f80eedd/4edf4acebd2ce575

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