jdk1.8 遍历map，并加上索引

	                        AtomicInteger optionIndex = new AtomicInteger(1);
				Map m = hashMap();
				//遍历选项
				x.forEach((k,y)->{
					Kv kv = new Kv();
					kv.set("\"name\"","\""+y+"\"");
					kv.set("\"checked\"",optionIndex.get()== answer);
					if(optionIndex.get()<5){
						optionList.add(kv);
						optionIndex.getAndIncrement();
					}
				});