java code style

Google Java style

https://google.github.io/styleguide/javaguide.html

• Source files are encoded in UTF-8.
• Tab characters are not used for indentation; use two spaces
• A source file consists of, in order:
• License or copyright information, if present
• Package statement
• Import statements

no wildcard imports

• Exactly one top-level class

never split overloads classes
always use braces for if,else,for,do and while
style of braces

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return () -> {
  while (condition()) {
    method();
  }
};

return new MyClass() {
   public void () {
    if (condition()) {
      try {
        something();
      } catch (ProblemException e) {
        recover();
      }
    } else if (otherCondition()) {
      somethingElse();
    } else {
      lastThing();
    }
  }
};

line-wrapping normally at 100, but there are exceptions; wrapped lines indent 4+ spaces

• Exactly one blank line separates each section that is present