Android 如何比较两个不同数组的对象？ for（int i=0；i

我必须比较来自2个不同数组列表的mcategory_id和scategory_id的值。如何比较这两个值？我应该用什么样的逻辑

如果您关心顺序，可以使用列表的“equals”方法

List mcategoryIdList=new ArrayList（）；
List SCATEGORYDLIST=新建ArrayList（）；
for（int i=0；i

如果不关心顺序，请使用集合：

List mcategoryIdList = new ArrayList();
List scategoryIdList = new ArrayList();
for (int i = 0; i < jsonArray.length(); i++) {
    //retrieve json objects
    JSONObject Jasonobject = jsonArray.getJSONObject(i);
    JSONObject jsonObject1 = jsonArray1.getJSONObject(i);

    //add to lists
    mcategoryIdList.add(Jasonobject.getString("category_id"));
    scategoryIdList.add(jsonObject1.getString("category_id"))
}

//now you can compare both
if(mcategoryIdList.equals(scategoryIdList)){
    //they're equal
}else{
    //they're not equal
}

Set mcategoryIdSet=new HashSet（）；
Set scategorydiset=new HashSet（）；
for（int i=0；i

阅读有关杰克森或JSONASSERT的信息，您可以提供更多详细信息。我在代码中没有看到ArrayList。似乎只有一个，items，您可以在这里收集所有疫苗接种数据。我使用的是来自json的两个不同数组列表。我必须比较McCategory_id和scategory_id…请检查我的CodeInvesturementData是否是模型类的对象

List mcategoryIdList = new ArrayList();
List scategoryIdList = new ArrayList();
for (int i = 0; i < jsonArray.length(); i++) {
    //retrieve json objects
    JSONObject Jasonobject = jsonArray.getJSONObject(i);
    JSONObject jsonObject1 = jsonArray1.getJSONObject(i);

    //add to lists
    mcategoryIdList.add(Jasonobject.getString("category_id"));
    scategoryIdList.add(jsonObject1.getString("category_id"))
}

//now you can compare both
if(mcategoryIdList.equals(scategoryIdList)){
    //they're equal
}else{
    //they're not equal
}

Set mcategoryIdSet = new HashSet();
Set scategoryIdSet = new HashSet();
for (int i = 0; i < jsonArray.length(); i++) {
    //retrieve json objects
    JSONObject Jasonobject = jsonArray.getJSONObject(i);
    JSONObject jsonObject1 = jsonArray1.getJSONObject(i);

    //add to sets
    mcategoryIdSet.add(Jasonobject.getString("category_id"));
    scategoryIdSet.add(jsonObject1.getString("category_id"))
}

//now you can compare both
if(mcategoryIdSet.equals(scategoryIdSet)){
    //they're equal
}else{
    //they're not equal
}