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→Ubuntu Jammy system
=== Ubuntu Jammy system ===
<ol start="41" style="list-style-type: decimal;">
<li><p>Ubuntu Jammy is equipped with a gcc compilation tool chain by default, which can directly compile the C language program in the Linux system of the development board</p>
<ol style="list-style-type: lower-alpha;">
<li><p>The version of gcc is shown below</p>
{| class="wikitable" style="width:800px;"
|-
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<p>orangepi@orangepi:~$ '''gcc --version'''</p>
<p>gcc (Ubuntu 11.2.0-19ubuntu1) '''11.2.0'''</p>
<p>Copyright (C) 2021 Free Software Foundation, Inc.</p>
<p>This is free software; see the source for copying conditions. There is NO</p>
<p>warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.</p>|}</li>
<li><p>The '''hello_world.c''' program that writes c language</p>
{| class="wikitable" style="width:800px;"
|-
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<p>orangepi@orangepi:~$ '''vim hello_world.c'''</p>
<p>#include <stdio.h></p>
<p>int main(void)</p>
<p>{</p>
::<p>printf("Hello World!\n");</p> ::<p>return 0;</p><p>}</p>|}</li>
<li><p>Then compile and run '''hello_world.c'''</p>
{| class="wikitable" style="width:800px;"
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<p>orangepi@orangepi:~$ '''gcc -o hello_world hello_world.c'''</p>
<p>orangepi@orangepi:~$ '''./hello_world'''</p>
<p>Hello World!</p>|}</li></ol>
</li>
<li><p>Ubuntu jammy is installed with Python3 by default</p>
<ol style="list-style-type: lower-alpha;">
<li><p>python3 specific version is shown below</p>
{| class="wikitable" style="width:800px;"
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<p>orangepi@orangepi:~$ '''python3'''</p>
<p>Python '''3.10.4''' (main, Apr 2 2022, 09:04:19) [GCC 11.2.0] on linux</p>
<p>Type "help", "copyright", "credits" or "license" for more information.</p>
<p>>>></p>
|}{| class="wikitable" style="background-color:#ffffdc;width:800px;" |-| <big><p>'''Use CTRL+D shortcut key to exit Python's interactive mode。'''</p></big>|}</li>
<li><p>The '''hello_world.py''' program that writes python language</p>
{| class="wikitable" style="width:800px;"
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<p>orangepi@orangepi:~$ '''vim hello_world.py'''</p>
<p>print('Hello World!')</p>|}</li>
<li><p>The results of running '''hello_world.py''' are shown below</p>
{| class="wikitable" style="width:800px;"
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<p>orangepi@orangepi:~$ '''python3 hello_world.py'''</p>
<p>Hello World!</p>|}</li></ol>
</li>
<li><p>Ubuntu Jammy defaults to compile tools and operating environments that are not installed in Java</p>
<ol style="list-style-type: lower-alpha;">
<li><p>You can use the following command to install openjdk-18</p>
{| class="wikitable" style="width:800px;" |-|<p>orangepi@orangepi:~$ '''sudo apt install -y openjdk-18-jdk'''</p>|}</li>
<li><p>After installation, you can check the version of the java</p>
{| class="wikitable" style="width:800px;"
|-
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<p>orangepi@orangepi:~$ '''java --version'''</p>
<p>openjdk 18-ea 2022-03-22</p>
<p>OpenJDK Runtime Environment (build 18-ea+36-Ubuntu-1)</p>
<p>OpenJDK 64-Bit Server VM (build 18-ea+36-Ubuntu-1, mixed mode, sharing)</p>|}</li>
<li><p>Edit the '''hello_world.java''' of Java version</p>
{| class="wikitable" style="width:800px;"
|-
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<p>orangepi@orangepi:~$ '''vim hello_world.java'''</p>
<p>public class hello_world</p>
<p>{</p>
::<p>public static void main(String[] args)</p>::<p>{</p>::::<p>System.out.println("Hello World!");</p>::<p>}</p>
<p>}</p>
<li><p>Then compile and run '''hello_world.java'''</p>
{| class="wikitable" style="width:800px;"
|-
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<p>orangepi@orangepi:~$ '''javac hello_world.java'''</p>
<p>orangepi@orangepi:~$ '''java hello_world'''</p>
<p>Hello World!</p>|}</li></ol>
</li></ol>
<span id="qt-installation-method"></span>
== QT installation method ==
