jmonkey engine move object to object move object to position

 package tests;

import com.jme3.app.SimpleApplication;

import com.jme3.light.AmbientLight;

import com.jme3.light.DirectionalLight;

import com.jme3.material.Material;

import com.jme3.math.ColorRGBA;

import com.jme3.math.Vector3f;

import com.jme3.renderer.RenderManager;

import com.jme3.scene.Geometry;

import com.jme3.scene.Spatial;

import com.jme3.scene.shape.Box;

/**

 * This is the Main Class of your Game. It should boot up your game and do initial initialisation

 * Move your Logic into AppStates or Controls or other java classes

 */

public class Tests extends SimpleApplication {

    

    public static void main(String[] args) {

        Tests app = new Tests();

        app.setShowSettings(false); //Settings dialog not supported on mac

        app.start();

    }

    private float interp = 0.0f;

    private float mySpeed = 2.0f;

    Spatial player;

    Spatial monster;

    

    @Override

    public void simpleInitApp() {

        

        player     = assetManager.loadModel("Models/cube.glb");

        rootNode.attachChild(player);

        

        monster     = assetManager.loadModel("Models/cube.glb");

        rootNode.attachChild(monster);

        monster.move(5f, 0, 0);

        

        setUpLight();

    }

    

    @Override

    public void simpleUpdate(float tpf) {

        Vector3f monsterPosition = monster.getLocalTranslation();

        Vector3f playerPosition = player.getLocalTranslation();

        float distance = playerPosition.distance(monsterPosition);

        interp += (mySpeed/distance) * tpf;

        if ( distance > 0.1f ) {

            monster.setLocalTranslation(new Vector3f().interpolateLocal(monsterPosition, playerPosition, interp));

        }

    }

        

    private void setUpLight() {

           // We add light so we see the scene

        AmbientLight al = new AmbientLight();

        al.setColor(ColorRGBA.White.mult(1.3f));

        rootNode.addLight(al);

        DirectionalLight dl = new DirectionalLight();

        dl.setColor(ColorRGBA.White);

        dl.setDirection(new Vector3f(2.8f, -2.8f, -2.8f).normalizeLocal());

        rootNode.addLight(dl);

    }

    @Override

    public void simpleRender(RenderManager rm) {

        //add render code here (if any)

    }

}