Complex sentence: The Java Platform provides a just-in-time (JIT) compiler called the "Java Virtual Machine", or JVM, which translates the Java bytecode into native processor instructions at run-time and caches the native code in memory during execution.
Split into simpler sentences: The Java Platform provides a just-in-time (JIT) compiler within the "Java Virtual Machine", or JVM, which handles execution of Java. The JIT compiler translates the Java bytecode into native processor instructions at run-time and caches the native code in memory during execution.