Language - Java Linux Javac: Difference between revisions

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#You will need a copy of [{{SERVER}}/downloads/phidget22/libraries/any/Phidget22Java.zip phidget22.jar]
#You will need a copy of [{{SERVER}}/downloads/phidget22/libraries/any/Phidget22Java.zip phidget22.jar]


==Use Our Examples==
==Installing Java==
One of the best ways to start programming with Phidgets is to use our example code as a guide. In order to run the examples, you will need to download and install the JDK. You can do this by entering the following command in the terminal (where VERSION is replaced with your preferred version number):
In order to use Java, you will need to download and install the JDK. You can do this by entering the following command in the terminal (where VERSION is replaced with your preferred version number):
<syntaxhighlight lang='bash'>
<syntaxhighlight lang='bash'>
apt-get install openjdk-VERSION-jdk
apt-get install openjdk-VERSION-jdk
Line 27: Line 27:
</syntaxhighlight>
</syntaxhighlight>


Now that you have the JDK installed and phidget22.jar on hand, select an example that will work with your Phidget:
{{Finding Code Samples|Java}}
*{{SampleCode|Java|Java Examples}}  
 
 
Your project folder should now look something like this:
[[Image:Java_javac_linux_folder.PNG|link=|center]]
 
 
Next, open the terminal at the folder location and enter the following command:
<syntaxhighlight lang='bash'>
javac -classpath .:phidget22.jar example.java
</syntaxhighlight>
 
Finally, enter the following command to run the program:
<syntaxhighlight lang='bash'>
java -classpath .:phidget22.jar example
</syntaxhighlight>
 
 
[[Image:Java_javac_linux_run.PNG|link=|center|850px]]
 


{{Edit_the_Examples}}
==Using the Code Samples==
To use the code sample from the [{{server}}/?view=code_samples&lang=Java Code Samples] page, you can click the '''Download Example''' button to download a Java file with the sample code.


==Editing the Examples==
[[Image:Java_Sample_Code_Download.png|link=|center|border|800px]]
{{Language_-_Java_Editing_the_Examples}}


==Setting up a New Project==
==Setting up a New Project==
When you are building a project from scratch, or adding Phidget functionality to an existing project, you'll need to configure your development environment to properly link the Phidget Java library.
Whether you are running our examples or adding Phidget functionality to an existing project, you'll need to configure your development environment to properly link the Phidget Java library.
 
In order to use Java, you will need to download and install the JDK. You can do this by entering the following command in the terminal (where VERSION is replaced with your preferred version number):
<syntaxhighlight lang='bash'>
apt-get install openjdk-VERSION-jdk
</syntaxhighlight>
 
Before continuing, ensure your JDK version matches your JRE version:
<syntaxhighlight lang='bash'>
javac -version
java -version
</syntaxhighlight>


You will also need a copy of [{{SERVER}}/downloads/phidget22/libraries/any/Phidget22Java.zip phidget22.jar].
The easiest way to allow Java to access the Phidgets Java library is to place a copy of [{{SERVER}}/downloads/phidget22/libraries/any/Phidget22Java.zip phidget22.jar] in the same folder as your program:


Create your new project folder and java file, and place phidget22.jar in the same folder as your new project file. Your folder should look somehting like this:
[[Image:Java_javac_linux_folder_new_project.png|link= | center]]
[[Image:Java_javac_linux_folder_new_project.png|link= | center]]


To use the Phidget Java library, add the following import to your code:
==Compile and Run==
<syntaxhighlight lang="java">
import com.phidget22.*;
</syntaxhighlight>
 
Once you are ready to run your program, open the command prompt at the folder location. Next, enter the following command in the command prompt:
Once you are ready to run your program, open the command prompt at the folder location. Next, enter the following command in the command prompt:
<syntaxhighlight lang="java">
<syntaxhighlight lang="java">
Line 89: Line 53:


[[Image:Java_javac_linux_new_project.PNG|link= | center|850px]]
[[Image:Java_javac_linux_new_project.PNG|link= | center|850px]]
The project now has access to Phidgets.
 
 
The project is now using Phidgets.


{{Language Page What's Next}}
{{Language Page What's Next}}

Revision as of 22:01, 16 October 2019

Language - Java

Linux with javac

Welcome to using Phidgets with Java! By using Java, you will have access to the complete Phidget22 API, including events.

Javac is a command line-based compiler for java programs that compiles java code into bytecode class files.

Install Phidget Drivers for Linux

Before getting started with the guides below, ensure you have the following components installed on your machine:

  1. You will need the Phidgets Linux Drivers
  2. You will need the Java Development Kit from Oracle
  3. You will need a copy of phidget22.jar

Installing Java

In order to use Java, you will need to download and install the JDK. You can do this by entering the following command in the terminal (where VERSION is replaced with your preferred version number): 

apt-get install openjdk-VERSION-jdk

Before continuing, ensure your JDK version matches your JRE version: 

javac -version
java -version

Finding Code Samples

To find the code sample to use for your Phidget, navigate to the Code Samples page and select your device from the drop-down menu.

Java sample code.jpg


Once you select your device, the code sample generator will give you a working code sample, and a selection of options to customize it to your needs.

Using the Code Samples

To use the code sample from the Code Samples page, you can click the Download Example button to download a Java file with the sample code.

Java Sample Code Download.png

Setting up a New Project

Whether you are running our examples or adding Phidget functionality to an existing project, you'll need to configure your development environment to properly link the Phidget Java library.

The easiest way to allow Java to access the Phidgets Java library is to place a copy of phidget22.jar in the same folder as your program:

Java javac linux folder new project.png

Compile and Run

Once you are ready to run your program, open the command prompt at the folder location. Next, enter the following command in the command prompt: 

javac -classpath .:phidget22.jar example.java

Finally, enter the following command to run the program: 

java -classpath .:phidget22.jar example
Java javac linux new project.PNG


The project is now using Phidgets.

What's Next?

Now that you have set up Phidgets to work with your programming environment, we recommend you read our guide on Phidget Programming Basics to learn the fundamentals of programming with Phidgets.Next Arrow.png


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