[nighterfighter]

In your Java code, you are addressing each Talon individually, and it is causing the motors to Twitch.

In the C++ code, the motors are NOT twitching, when you are calling the ArcadeDrive method.

Try addressing each talon in C++ and see if it twitches.

Try this code and see if it twitches:

#include "WPILib.h"

/**
 * This is a demo program showing the use of the RobotDrive class.
 * The SampleRobot class is the base of a robot application that will automatically call your
 * Autonomous and OperatorControl methods at the right time as controlled by the switches on
 * the driver station or the field controls.
 *
 * WARNING: While it may look like a good choice to use for your code if you're inexperienced,
 * don't. Unless you know what you are doing, complex code will be much more difficult under
 * this system. Use IterativeRobot or Command-Based instead if you're new.
 */
class Robot: public SampleRobot
{
	
	Joystick stick; // left joystick
	Joystick stick2; //right joystick
	Talon left1;
	Talon left2;
	Talon right1;
	Talon right2;

public:
	Robot() :
				
			stick(0),
			stick2(1),
			left1(4),
			left2(5),
			right1(6),
			right2(7)
		
	{
		
		myRobot.SetExpiration(0.1);
	}

	void RobotInit()
	{
	}

	
	void Autonomous()
	{
		left1.Set(0.0);
		left2.Set(0.0);
		right1.Set(0.0);
		right2.Set(0.0);
	}

	
	void OperatorControl()
	{
		myRobot.SetSafetyEnabled(true);
		while (IsOperatorControl() && IsEnabled())
		{
			left1.Set(stick.GetY());
			left2.Set(stick2.GetY());
			right1.Set(-stick2.GetY());
			right2.Set(-stick2.GetY());
			
			Wait(0.005);				
		}
	}

	
	void Test()
	{
	}
};

START_ROBOT_CLASS(Robot)

Test it in Autonomous mode (where it sets values of 0.0), TeleOp mode (where it reads the Y axis of each joystick) and Test mode (where it does nothing).