I'm trying to import the BigDecimalMath class into my current project. I created a new library by going to Tools -> Libraries -> New Library. I called the library BigDecimalMath, as you can see below. I added a new JAR/Folder and then selected the download from Cornell's website, here. Direct download.
I'm unsure of how to import it into my class now. This library is part of my current project. I've tried import org.nevec.rjm and some other things, but I think I'm doing something wrong. Any advice appreciated. Thanks!
You appear to have a source version of that library. Your window displays a jar containing org.nevec.rjm.BigDecimalMath.java. I think you need to download a binary version of the jar and add that to your class-path. Then you would import that one class with,
import org.nevec.rjm.BigDecimalMath;
or the entire package with,
import org.nevec.rjm.*;
Alternatively, you might be able to build the library from your src jar.
Related
I am working on a Java fx application and I need to import some libraries from com.google.maps.
I imported these libraries :
import com.google.maps.GeoApiContext;
import com.google.maps.PlaceDetailsRequest;
import com.google.maps.PlacesApi;
import com.google.maps.QueryAutocompleteRequest;
import com.google.maps.errors.ApiException;
import com.google.maps.model.AddressComponent;
import com.google.maps.model.AddressComponentType;
import com.google.maps.model.AutocompletePrediction;
import com.google.maps.model.PlaceDetails;
The java import statement is a little bit misnamed, it really means alias. import com.google.maps.GeoApiContext; really just means: Any time you find the type GeoApiContext anywhere in this source file, assume I meant to write com.google.maps.GeoApiContext.
Crucially, it does not 'invoke' any code in that class whatsoever, nor does it find or download any dependencies from the internet for you.
You will need to find the jar(s) that provide these classes and put them on the classpath of this project.
It can be as simple as downloading the relevant jar (perhaps com.google.maps-google-maps-services.jar?), put it in a lib dir someplace inside this project, finding that in the package explorer, right clicking it, and selecting 'add to classpath'.
Or, more likely, you want to use gradle or maven to take care of this for you: These tools turn simply mentioning the dependency in a list of libraries you require into automatically finding that on the internet, downloading it, configuring your IDE so that it knows where it is, and using that dependency during build and run steps.
So i am using gradle to get dependencies from maven central which is working fine. I just don't know how to import them to my actual java file.
How do i found out the name to import it?
at the top of my java file i have to write
import <name>
How do i find the name?
Thank You.
According to your comments. You have to import the packages, which are contained within the library, not the library itself. There is no guarantee, this package names are the same as group or artifact id of the library. To get know that package names, usually you may use a javadocs for the library. Or just simply let your IDE to make it for you, them you're trying to use some classes from that lib.
Alternatively, you can use some off-sites, like mvnrepository.com, where you may find your library and take a look at the packages list within it. For example, description for Apache Commons Lang library, where you can see the "Packages" section with all the packages within the lib. You may import them, just like:
import org.apache.commons.lang3.*;
One more solution, is to unzip a jar and take a look into it's content to determine the packages structure.
I am working through the RabbitMQ Java tutorial found here: https://www.rabbitmq.com/tutorials/tutorial-one-java.html
I have downloaded the Java Client Library package, and copied the JAR files to my project in Eclipse, but the import statements
import com.rabbitmq.client.ConnectionFactory;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.Channel;
all yield the error
The import "com.rabbitmq" cannot be resolved.
The instructions are unclear how to incorporate the JAR files from the Java Client Library package, how should I proceed?
You can download the rabbitmq-java-client-bin-3.5.4.zip from official link here . Then extract the rabbitmq-client.jar from the zip & add it to your class path in project. Then you will be able to resolve The import "com.rabbitmq". Give it a try.
Since the verified answer doesn't work anymore, here is my solution:
You can download the amqp-client-5.8.0.jar from here . Then add it to your class path, like any other jar.
In case that the link doesn't work, you can manually download it from here or even add the required dependency to your maven/gradle project.
For Visual studio code(vscode) we need to add the library file under Referenced Libraries enter image description here under the Java projects section.
enter image description here.imgur.com/txB2s.png
I want to integrate my app with Authorize.Net. I have followed the Steps given in tutorial http://developer.authorize.net/integration/fifteenminutes/android/.
my library project anet_android_sdk showing no error. But when I created a new project as in step 3. I am getting error.
import net.authorize.android.AuthNet;
import net.authorize.android.AuthNetActivityBase;
import net.authorize.android.SimpleActivity;
import net.authorize.android.button.AuthNetButton;
Within the anet_android_sdk folder you will find the src folder and within that you will find some packages and classes.Just take the necessary packages and classes like
net.authorize.android.aim,net.authorize.android.arb,net.authorize.android.button,net.authorize.android.cim,net.authorize.android.notification etc. in your project.Maintain them within different packages as in the src folder.
The full source code can be found here:
https://drive.google.com/file/d/0B5tCy5V7jKsdOEdPS3c1VTc2MTA/edit?usp=sharing
I have about 100 jar files and I think I want to make a library with them. What is the best way to do this? How does importing work with this. Do I still have to ask for each class or do I just refer to the new library?
More detail
I have the GeoTools9.4 package (in a zip). It has about 100 jar files. When I import these into my project in eclipse, it takes each jar file and stuffs it in and clutters up my structure. So I think I want a library (or a package or a class) I am not sure what the terminology is here.
More detail on how to call the classes in the new library.
Right now here is how I call the classes
import org.geotools.data.FileDataStore;
import org.geotools.data.FileDataStoreFinder;
import org.geotools.data.simple.SimpleFeatureSource;
If I put all of these jar files in a library can I replace the above lines with a new import like
import org.geotools.local
or do I not need to change the way they are called?
I propose you to use a Maven for this stuff.
Maven is a greay build tool, that could take care of problems, like adding dependency jars to a project. Also, GeoTools support Maven and have a nice manual for it (http://docs.geotools.org/latest/userguide/tutorial/quickstart/maven.html)
About last question - when you'll add this libraries, full name of these classes will be the same, so you must import and use them as you import them right now.
This is not usually refered to as "calling" the classes, but rather importing the classes meaning that they become available to the class that uses them.
No matter how you have those classes (in many jars or a single jar) you still need to have the import statements in the beggining of the class file for the source to be compiled
I am not sure how Eclipse "clutters up" your structure. You can place all the jars in a single folder e.g. lib and then import them into your eclipse project from that folder. If you mean that the jars show up in the left pane then there are filters that can hide them. In Eclipse there is the concept of a Working set where you can select what it would be visible and what not.
I hope it helps