Question

The operator > is undefined for the argument type(s) String, int

用arraylist存了数组，如何用get（）提取出来？
private void showInventory() {

Iterator<GoodsInfo> iterator=goodsList.values().iterator();

......
}
System.out.print(goodsinfo.getGoodsPrice()+"\t");
System.out.println(goodsinfo.getGoodsInventory()+"\t");
goodsnum.add(goodsinfo.getGoodsNum());
goodsname.add(goodsinfo.getGoodsName());
goodsprice.add(goodsinfo.getGoodsPrice());
goodsinventory.add(goodsinfo.getGoodsInventory());
}
}

Answer 1

那个readLine()返回的是一个字符串吧, 不是int类型.
试一试, int i = Integer.parseInt(num);
参考:https://zhidao.baidu.com/question/144544532.html