Can the JDK execute Java programs?

Can the JDK execute Java programs?

• A. Yes.
• B. No.
• C. Only after bytecode generation.
• D. Only within a dedicated runtime.

Answer: (A)

The key idea is that running Java programs relies on the Java Virtual Machine (JVM), which executes the bytecode produced from Java source. The JDK includes both a compiler (to turn source code into bytecode) and the JVM (to run that bytecode) along with the standard library. Because the JDK provides the runtime environment the JVM, you can write Java code, compile it, and run it directly using the JDK. The JVM handles loading, verifying, and executing the bytecode, either by interpretation or by Just-In-Time compilation for speed. In short, the JDK can execute Java programs because it contains the necessary runtime (the JVM) in addition to development tools.

The key idea is that running Java programs relies on the Java Virtual Machine (JVM), which executes the bytecode produced from Java source. The JDK includes both a compiler (to turn source code into bytecode) and the JVM (to run that bytecode) along with the standard library. Because the JDK provides the runtime environment the JVM, you can write Java code, compile it, and run it directly using the JDK. The JVM handles loading, verifying, and executing the bytecode, either by interpretation or by Just-In-Time compilation for speed. In short, the JDK can execute Java programs because it contains the necessary runtime (the JVM) in addition to development tools.