Motor

First of all, you have to create LegoPort, as mentioned in tutorial LegoPort.

LegoPort port = new LegoPort(LegoPort.OUTPUT_A);

Then, we can play with the motors now! Import the Motor class.

import ev3dev.hardware.Motor;

And then, create a new instance of it.

Motor motor = new Motor(port); //Use the last created port

You can command it with different commands:

• motor.runForever() A function to cause the motor to run until another command is sent
• motor.runToAbsPos() A function to run to an absolute position specified by setPosition_SP(int pos)
• motor.runToRelPos() A function to run to an position relative to the current position value.
• motor.runTimed() A function to run the motor for the amount of time specified in setTime_SP(int ms)
• motor.runDirect() A function to run the motor at the duty cycle specified by setDutyCycle_SP(int dutycycle_sp)
• motor.stop() A function to stop any of the run commands before they are complete using the command specified by setStopCommand(String command)
• motor.reset() A function to reset all of the motor parameter attributes to their default value. This will also have the effect of stopping the motor.

Example code:

public static void main(String[] args) throws IOException, InvalidException{
    LegoPort port = new LegoPort(LegoPort.OUTPUT_A);
    Motor motor = new Motor(port);
    motor.setTime_SP(5000);
    motor.setDutyCycle_SP(50);
    motor.runTimed();
}

Different advanced functions / variable are not mentioned here. Check the JavaDoc for more information.