Access native OS calls from a Java program

Explain how to access native operating system calls from my Java program.

To access native operating system calls from my Java program JNI is used. Java native Interface (JNI) is a programming framework that allows Java code to interact with code written in another language, typically C or C++. JNI enables one to write native methods to handle situations when an application cannot be written entirely in the Java programming language. It is also used to modify an existing application which is written in another programming language so that it can be accessible to Java applications. Many of the standard library classes depend on JNI to provide functionality to the developer and the user. The Java Development Kit (JDK) provides tools and library routines that help the Java programmer interface with native code. The system calls are written in C and C++ so to access these call JNI is used.
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