How does Java code execute?

To execute Java code, you need to follow the steps below:

1. To install the Java Development Kit (JDK), you first need to download and install the suitable version for your operating system from the official Oracle website. This is essential for Java programming.
2. Write Java code: Use a text editor (such as Notepad, Sublime Text, or Eclipse etc.) to write your Java code. Save the Java code in the form of a .java file, ensuring that the file name matches the main class name.
3. Compile Java code: In the command line window, use the javac command to compile your Java code. Open the command line window, navigate to the directory containing your Java code file, and then run the following command: javac YourJavaFileName.java, where YourJavaFileName is the name of your Java code file. After successful compilation, a .class file will be generated in the current directory.
4. Run Java code: In the command line window, use the java command to run your Java code. Enter the command: java YourJavaClassName, where YourJavaClassName is the main class name in your Java code. This will execute your Java code and display the output results on the console.

The above explains how to run Java code in a command line window. Alternatively, you can also use Integrated Development Environments (IDE) such as Eclipse, IntelliJ IDEA, etc. to write, compile, and run Java code. These IDEs provide a more convenient way to manage and run Java projects.