Hi Vijaykumar,
Simulink does utilize Java for certain functionalities, but it is not mandatory to have Java installed on your Windows system to run Simulink as a desktop application. Every installation of MATLAB, which includes Simulink, comes bundled with its own version of the Java Virtual Machine (JVM). This means that it is not required to install Java separately to use Simulink. The bundled JVM handles Java-related tasks.
The specific version of the JVM that MATLAB uses can be checked by entering the command 'version -java' in the MATLAB command window. You can run Simulink without any additional Java installations. The built-in JVM will support all necessary Java functions required for its operation.
I hope this clears your query.
For more details, refer to the following MathWorks documentation on Getting started with Java Libraries: https://www.mathworks.com/help/matlab/matlab_external/product-overview.html