How is independence of software solutions from a specific execution platform achieved?

Independence of software solutions from a specific platform is achieved through the use of an intermediate abstraction layer that hides the features of the operating system and hardware platform. In Java, this is implemented via the JVM (Java Virtual Machine).

The application is compiled into bytecode, which is platform-independent. The JVM on each platform interprets or compiles the bytecode into machine code specific to that platform. Thus, the same Java application can run on Windows, Linux, macOS, and other systems without changes.

This allows developers to write code once and run it anywhere that has a compatible JVM.

Example:

public class HelloWorld {
    public static void main(String[] args) {
        System.out.println("Hello, world!");
    }
}

This code can be compiled into bytecode and run on any platform with a JVM.