accessing variables in a method that returns a void

[mochajava]

hello,

i am trying to learn java and came across this snippet of code.

public synchronized void invert() {
        red = 255 - red;
        green = 255 - green;
        blue = 255 - blue;
        name = "Inverse of " + name;
    }

how can one acess the variables in this case? as the method has a void or null return so it wont return anything, correct?

[Fubarable]

These variables have not been been declared within the method and thus are class fields and are visible throughout the class.

[mochajava]

thanks for the instant reply and explanation.

i am going through the oracle trails to understand java and keep on getting stuck every now and then.