在标记重复或下注之前仔细阅读.
我的要求是改变对象的Arraylist,保持列表数据相同只是改变位置.我有一个类型Dummydata:
List<DummyData> dataList = new ArrayList<>();
我的DummyData类有三个String字段.
So adding some data for clarification:
dataList.add(new DummyData("Item1","Price1","Discount1"));
dataList.add(new DummyData("Item2","Price2","Discount2"));
dataList.add(new DummyData("Item3","Price3","Discount3"));
dataList.add(new DummyData("Item4","Price4","Discount4"));
dataList.add(new DummyData("Item5","Price5","Discount5"));
当我使用Collections.shuffle(dataList);
输出是:
Item5 Price3 Discount4
Item2 Price1 Discount2
and some random output like this everytime.
我的预期输出是:
Item2 Price2 Discount2
Item5 Price5 Discount5
Item1 Price1 Discount1
只是位置应该改变列表数据不应该混杂.所以我的问题是这可能实现使用Collections.shuffle或不？