import com.vividsolutions.jts.geom.Coordinate;
import com.vividsolutions.jts.geom.CoordinateArrays;
import com.vividsolutions.jts.geom.GeometryFactory;
import com.vividsolutions.jts.math.Vector2D;
import com.vividsolutions.jts.geom.*;

// Start point
double x1 = 0
double y1 = 0

// Angle
double angle = Math.PI / 3;

// Max distance
double distance =  100

Coordinate ptStart = new Coordinate(x1, y1);
Vector2D vStart = new Vector2D(ptStart);
GeometryFactory gf = new GeometryFactory();
Vector2D v = Vector2D.create(1, 0);
v.rotate(angle);
// Normalize the vector (length=1), we keep only the direction
v.normalize();
double targetStepLength = 10; //target step length m
int stepCount = math.round(distance / targetStepLength) ;
double stepLength = distance / stepCount ;
// This is the translation vector
v = v.multiply(stepLength);

for(int i=0; i < stepCount; i ++) {
 LineSegment stepLine= new LineSegment(vStart.add(v.multiply(i)).toCoordinate(), vStart.add(v.multiply(i + 1)).toCoordinate());
 LineString geom =   stepLine.toGeometry(gf);
 println(geom.toString())
}