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Hello i want to do an action like printing in the console, playing a sound when a spatial intersect other spatial. How do i do that?
Here is my try

import com.jme3.app.SimpleApplication;
import com.jme3.bullet.BulletAppState;
import com.jme3.bullet.collision.PhysicsCollisionEvent;
import com.jme3.bullet.collision.PhysicsCollisionListener;
import com.jme3.bullet.collision.shapes.BoxCollisionShape;
import com.jme3.bullet.collision.shapes.CollisionShape;
import com.jme3.bullet.control.GhostControl;
import com.jme3.bullet.control.RigidBodyControl;
import com.jme3.bullet.util.CollisionShapeFactory;
import com.jme3.collision.CollisionResult;
import com.jme3.collision.CollisionResults;
import com.jme3.input.KeyInput;
import com.jme3.input.controls.AnalogListener;
import com.jme3.input.controls.KeyTrigger;
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.scene.Geometry;
import com.jme3.scene.Node;
import com.jme3.scene.shape.Box;

public class TestCollision extends SimpleApplication implements AnalogListener,PhysicsCollisionListener
{
	private Node cube1, cube2;
	static BulletAppState bulletAppState;
	private RigidBodyControl controlCube1, controlCube2;
	public static void main(String args[])
	{
		TestCollision testCollision=new TestCollision();
		testCollision.start();
	}
	@Override
	public void simpleInitApp()
	{
		AmbientLight al=new AmbientLight();
		al.setColor(ColorRGBA.White);
		rootNode.addLight(al);
		DirectionalLight dl=new DirectionalLight();
		dl.setDirection(new Vector3f(0, -1, -2));
		flyCam.setMoveSpeed(10);
		Geometry cube1=makeBox(new Vector3f(1, 0, 1));
		Geometry cube2=makeBox(new Vector3f(-2, 0, -2));
		this.cube1=new Node("cube1");
		this.cube2=new Node("cube2");
		this.cube1.attachChild(cube1);
		this.cube2.attachChild(cube2);
		rootNode.attachChild(this.cube1);
		rootNode.attachChild(this.cube2);
		initKeys();

		bulletAppState=new BulletAppState();
		stateManager.attach(bulletAppState);
		bulletAppState.getPhysicsSpace().addCollisionListener(this);
		bulletAppState.getPhysicsSpace().enableDebug(assetManager);
		initControl(controlCube1, this.cube1);
		initControl(controlCube2, this.cube2);
	}
	@Override
	public void simpleUpdate(float tpf)
	{
//		CollisionResults collisionResults=new CollisionResults();
//		cube1.collideWith(cube2, collisionResults);
//		CollisionResult restult=collisionResults.getClosestCollision();
//		if(restult!=null)
//			System.out.println("1111111111111111111111");
	}
	private Geometry makeBox(Vector3f loc)
	{
		Box box=new Box(loc, 0.5f, 0.5f, 0.5f);
		Geometry cube=new Geometry("Cube", box);
		Material matLightning=new Material(assetManager, "Common/MatDefs/Light/Lighting.j3md");
		cube.setMaterial(matLightning);
		return cube;
	}
	private void initKeys()
	{
		inputManager.addMapping("left", new KeyTrigger(KeyInput.KEY_NUMPAD4));
		inputManager.addMapping("right", new KeyTrigger(KeyInput.KEY_NUMPAD6));
		inputManager.addMapping("forward", new KeyTrigger(KeyInput.KEY_NUMPAD8));
		inputManager.addMapping("back", new KeyTrigger(KeyInput.KEY_NUMPAD5));

		inputManager.addListener(this, new String[]{"left","right","forward","back"});
	}
	@Override
	public void onAnalog(String name, float value, float tpf)
	{
		final float SPEED=2;
		if(name.equals("left"))
		{
			cube1.move(-SPEED*tpf, 0, 0);
		}
		if(name.equals("right"))
		{
			cube1.move(SPEED*tpf, 0, 0);
		}
		if(name.equals("forward"))
		{
			cube1.move(0, 0, -SPEED*tpf);
		}
		if(name.equals("back"))
		{
			cube1.move(0, 0, SPEED*tpf);
		}
	}
	@Override
	public void collision(PhysicsCollisionEvent e)
	{
		System.out.println("cube 1 intersect cube 2");
	}
	private void initControl(RigidBodyControl control, Node cube)
	{
		CollisionShape collisionShape=CollisionShapeFactory.createDynamicMeshShape(cube);
		control=new MyPhysicsControl(collisionShape, 0);
		cube.addControl(control);
		bulletAppState.getPhysicsSpace().add(control);
	}
}

Btw I`ve read all tutorials

http://jmonkeyengine.org/wiki/doku.php/jme3:beginner:hello_picking

http://jmonkeyengine.org/wiki/doku.php/jme3:beginner:hello_collision

http://jmonkeyengine.org/wiki/doku.php/jme3:beginner:hello_physics

http://jmonkeyengine.org/wiki/doku.php/jme3:advanced:collision_and_intersection

http://jmonkeyengine.org/wiki/doku.php/jme3:advanced:mouse_picking

http://jmonkeyengine.org/wiki/doku.php/jme3:advanced:physics

but i still can`t figure it out pls help me.Can you send me the code pls