How to make a boolean variable switch between true and false every time a method is invoked?

Question

I am trying to write a method that when invoked, changes a boolean variable to true, and when invoked again, changes the same variable to false, etc.

For example: call method -> boolean = true -> call method -> boolean = false -> call method -> boolean = true

So basically,

if (a = false) { a = true; } if (a = true) { a = false; } 

I am not sure how to accomplish this, because every time I call the method, the boolean value changes to true and then false again.

Answer 1

value ^= true; 

That is value xor-equals true, which will flip it every time, and without any branching or temporary variables.

Answer 2

Without looking at it, set it to not itself. I don't know how to code it in Java, but in Objective-C I would say

booleanVariable = !booleanVariable; 

This flips the variable.