` package foo; public class Hello { public static void main(String[] args){ System.out.println("hi world"); } } ` #As for the build and run, javac foo/Hell

` package foo; public class Hello { public static void main(String[] args){ System.out.println("hi world"); } } ` #As for the build and run, javac foo/Hello.java java foo.Hello --- Structure You need: a package*, a class*, and a main method* 3 Code The package needs to match the folder* : 1 The class needs to be public* and match* the file name; Main method needs public* and static* and take an array of String args*; you need to remember the call to output to console* : 6 Build and Run Have to remember javac* and java* : 2 javac and java have to be available when you call them 0 - 10 [10 if you have corporate IT managed machine] (I'll call this 1) Remember where to put the package for each call : 2 --- So I only got 15. I could have probably got more if I tried. Just because each of those 15 things is trivial by itself, does not mean you can ignore them. I got to do 'the algorithm game' with middle-schoolers. I was the "Peanut Butter and Jelly Sandwich Robot". I took their instructions literally. It was a hoot. It's less fun when the computer isn't trying to help you.