In this Java code challenge, you’ll learn about the Command design pattern and see several examples of the pattern in practice. I will also discuss how the Command pattern implements two core ...

But these aforementioned Java command-line tools -- namely, javac, javap, jstat, jdeps and jar -- are the five that serious software developers need to know.

Step 5: Run the Java preview feature code With the code compiled, you can execute it by adding the --enable-preview switch to the java command: jdk13@preview:$ java --enable-preview ...