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

//Distance of the last point
double x2 = 100
double y2 = 100

//Max distance
double distance =  100

Coordinate ptStart = new Coordinate(x1, y1);
Coordinate ptEnd = new Coordinate(x2, y2);
Vector2D vStart = new Vector2D(ptStart);
GeometryFactory gf = new GeometryFactory();
Vector2D v = Vector2D.create(ptStart, ptEnd);
// Normalize the vector (length=1), we keep only the direction
v.normalize();
double stepLength = 10; //length m
stepLength>distance?distance:stepLength
int stepCount = Math.round(distance/stepLength);
// 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())
}