i have a player1 with a healthbar i need player1 healthbar to decrease everytime player2 hits player 1 @danpost do you have a sample game for this? or can u make a multiplayer game where 2 players fight? please need a sample code for this

java.lang.IllegalStateException: Actor not in world. An attempt was made to use the actor's location while it is not in the world. Either it has not yet been inserted, or it has been removed. at greenfoot.Actor.failIfNotInWorld(Actor.java:713) at greenfoot.Actor.getOneIntersectingObject(Actor.java:964) at slash2.handleCollisions(slash2.java:10) at slash2.act(slash2.java:45)

//this is what brings damage to the player import greenfoot.*; // (World, Actor, GreenfootImage, Greenfoot and MouseInfo) public class slash2 extends Actor { private int slashcount; int collisionCountdown = 0; // Need to slowdown losing health public void handleCollisions() { Actor Hero = getOneIntersectingObject(Hero.class); if( Hero != null ) { HBWorld w = (HBWorld) getWorld(); w.subtractHealth(5); collisionCountdown = 0; } } public slash2() { GreenfootImage image = getImage(); image.scale(image.getWidth() -250 , image.getHeight() -250 ); setRotation(-50); setImage(image); } public void slash2() { if (Greenfoot.isKeyDown("down")) { getWorld().addObject(new slash2(), getX() + 50, getY()); } } public void act() { slashCount(); if( collisionCountdown > 0 ) { collisionCountdown--; } else { handleCollisions(); } } public void slashCount() { if (Greenfoot.isKeyDown("down")) { slashcount++; }else { getWorld().removeObject(this); } if (slashcount>=2) { getWorld().removeObject(this); } } }

Insert as 2nd line in act: