Toggles task completion by inverting the boolean

ToggleTaskComplete.java

	/**
	 * Toggles task completion boolean.
	 * <p>
	 * Checks that there are tasks.
	 * Asks user for index of Task in the ArrayList to toggle.
	 * After obtaining the Task from the ArrayList flip the isCompleted boolean.
	 */
	private void toggleTaskComplete(){
		if (tasks.isEmpty()==false){ // Make sure there are tasks
			System.out.println("What is the index of the task you'd like to toggle?");
			try{
				int userIndex = keyboard.nextInt(); // Get index of task
				Task currentTask = tasks.get(userIndex); // Get the task
				currentTask.setIsComplete(!currentTask.getIsComplete()); // Invert the boolean
			}catch (InputMismatchException e){
				System.err.println(e.getMessage());				
			}
			catch(IndexOutOfBoundsException e){
				System.err.println(e.getMessage());
			}
		}
		else{
			System.out.print("Nothing to toggle, no tasks");
		}	
	}