Next to white space, the most important part of any Java program is comments. Keep in mind the syntax of a language is designed for communicating a program's design to a computer. Comments, on the other hand, are the primary mechanism for communicating a program's design to humans. Java has three types of comments.
Inline comments:
answer = 42; // valid independent of the input
/*
... This next bit of code is so obvious that I hesitated to
comment it a first. But, rather than risk any point reduction
in this otherwise flawless program, I have decided to add
this block comment with a recipe for a Gremolata garnish:
2 tablespoons of finely chopped parsley
1 minced clove of garlic
½ teaspoon of grated lemon rind
Sprinkle this mixture on sauce, gravy, or computer
programs during the last 5 minutes of preparation.
*/
question = "To be, or not to be".