My attempt and reading in a relation-database like file with id's

crap

items = new ArrayList<Item>();
		for(String s : lines){
			String[] data = s.split("|");
			items.add(new Item(Integer.parseInt(data[0]), data[1],data[2], new ArrayList<Item>())); 
		}
		
		for(int i =0; i< lines.size(); i++){
			String[] temp = lines.get(i).split("|");
			List<Integer> ids = new ArrayList<Integer>(); 
			String[] temp2 = temp[3].split(",");
			
			for(String s : temp2)
				ids.add(Integer.parseInt(s)); 
			
			for(Integer id : ids){
				for(Item ii: items){
					if(ii.getID() == id){
					   ii.getMatches().add(ii); 
					}
				}
			}
			
		
		}