return *this;

necip

Using Processing 2.2.1

  class TTurtle {
    float   flDeg;
    TPoint  P;
    ...
  
  TTurtle& CT (void) {
    P.x = width / 2;
    P.y = height / 2;
    
    flDeg = 0.0;
    return *this;
    }
  }

Line 6 - unexpected Token: TTurtle!

The idea about returning "this" is to use function calls separated with .

  TTurtle T = new TTurtel...
  
  T.CT().LT(45).FW(100);

instead of:

  T.CT();
  T.LT(45);
  T.FW(100);

Why doesn't it work in java?

GoToLoop

• When the Java language was created, it was determined it wouldn't have any operators to directly manipulate pointers.
• So those * and & operators don't act as pointer manipulators in Java.
• Mostly we'd only find such operators in old languages like C, C++, etc.
• For modern programming languages, it's just assumed that everything (or almost) is an object already.
• Therefore all variables (or almost) store the 1st memory address value of 1 object.
• That initial memory address is called reference rather than pointer.
• And an object is some contiguous allocated memory block. Generally in the heap region.
• Thus there's no need for such operators. Variables themselves are "pointers" already!

TTurtle CT() {
  P.x = .5 * width;
  P.y = .5 * height;
  flDeg = 0.0;
  return this;
}

Take a look @ my Colour class in the link below:
https://forum.Processing.org/two/discussion/10362/help-with-a-multidimensional-array

Most of its methods return this. That is, most of them allow chaining calling. :ar!

P.S.: Most folks would prefer to type in methods in all lowercase letters:
Rather than T.CT().LT(45).FW(100);, this 1: t.ct().lt(45).fw(100);. 8->