Is it possible to manipulate the operating system with java? I wanted to build a program that manipulates the operating system by creating keys in the windows registry, observes the behavior of the hardware (like a task manager)
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Answer
Yes it is possible call native code to perform OS specific calls from Java – such as manipulate the Windows Registry. You should look at JNI – such as this tutorial, or if you use JDK16 or JDK17 you might have a look at the incubating JDK Panama – Foreign Memory API.
However be warned that Panama APIs may change by the time (/whenever) they are incorporated into JDK officially. Also the JDK17 version is different to JDK16, and the tools support that makes Panama so easy to use – jextract – was not released with JDK16 or JDK17 and you may want to view the latest Panama Early Access build instead. This answer has example of native calls using JDK17 Panama.