list为对象的集合
//按照id正序排列
Collections.sort(list, new Comparator<Product>() {
public int compare(Product arg0, Product arg1) {
return arg0.getgetId().compareTo(arg1.getId());
}
});
进化版
//按照开始时间排序
Collections.sort(list, (arg0, arg1) -> arg0.getId.compareTo(arg1.getId));
进化版
Collections.sort(list, Comparator.comparing(Product::getId));
或
list.sort((o1, o2) -> o2.getId().compareTo(o1.getId()));
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