using float vs int variable in rotate()

[matt.e]

Any suggestions why I get an error with this sample program? Error says "angle" should be int instead of float when used in rotate(). I'm new to this, thanks for your help

Code: Select all

public class RotateExample
{
   public static void main(String args[])
   {
      // The distance to move forward
      float distance = 50.0f;
      
      // The radius of the wheels
      float radius = 2.8f;
      
      // The approximate value of Pi
      float Pi = 3.1415f;
      
      // The angle in degrees according to our formula
      float angle = (180*distance)/(Pi*radius);
      
      // Now rotating both wheels by that many degrees and
      // the robot should drive forward by 'distance'
      Motor.A.rotate(angle);
      Motor.C.rotate(angle);
   }
}

[roger]

The reason is simple. The rotate method in the NXTRegulatedMotor requires an integer parameter. See this link.
http://lejos.sourceforge.net/nxt/nxj/api/lejos/nxt/NXTRegulatedMotor.html#rotate(int)
Perhaps your are new to Java and did not know that Java is a strongly typed language. All variables must belong to a specific type, and all method parameters require a specific type. Sometimes you can convert one type to another by casting the variable.

[matt.e]

Yes, very new. Thanks for your help