Java Programming for Complete Beginners - Java 16 - Step 04 - Create and Compile Planet.java Class

The video tutorial explains how to transition Java code from JShell to a standalone file, compile it, and create bytecode. It covers the process of saving Java code to a file, ensuring the class name matches the file name, and compiling the code using Java 9. The tutorial also emphasizes the importance of exiting JShell properly and checking for Java installation. Finally, it demonstrates compiling the code to generate a class file containing bytecode.

What is the first step when moving Java code from JShell to a file?

• Save the code as a text document

• Run the code in a different IDE

• Move the code into a file

• Compile the code directly in JShell

Why is it important for the class name to match the file name in Java?

• To ensure the code runs faster

• To avoid compilation errors

• To make the code more readable

• To allow the use of multiple classes in one file

What should you do before exiting JShell?

• Delete unnecessary files

• Take a backup of your code

• Compile all classes

• Run all methods

Which command is used to compile a Java file?

• javac

• java

• compile

• run

What is generated after compiling a Java file?

• Source code

• Text document

• Bytecode

• Executable file

What should you check if you encounter issues compiling Java code?

• Verify the Java version installed

• Ensure the file is saved in the correct directory

• Check if the file is open in another program

• Make sure the computer is connected to the internet

What is the purpose of the 'planet.class' file?

• It is a backup of the original file

• It is used for debugging

• It stores the compiled bytecode

• It contains the source code