在 while 循环中将对象添加到列表中 [英] Adding and object to a list inside a while loop

问题描述

我正在尝试循环一个列表，该列表中有 4 个数组，每个数组有 7 个值

I'm trying to loop a list and that list have 4 arrays inside and each array have 7 values

我正在循环列表，然后当我从列表中获取一个数组时，因为我知道该数组有多少个值，所以我像这样分配每个数组索引:personObject.setName(String.valueOf(myArray[0)]) 然后在 while 循环的末尾，我将 personObject 添加到 Persons 列表中，如下所示:listOfPersons.add(personObject).

I am looping the list and then when I get an array from the list, since I know how many values have the array I assign each array index like this: personObject.setName(String.valueOf(myArray[0]) and then at the end of the while loop I add to a list of Persons the personObject like this: listOfPersons.add(personObject).

我的问题是我的列表只填充了相同的对象，我知道我循环的列表中的 4 个数组具有不同的值，这是我的代码:

My problem is that my list only gets populate with the same object and I know that the 4 arrays inside the list that I'm looping have different values, here is my code:

ArrayList<Object> objectList= null;
objectList= _serviceVariable.getObjects(); <--- this works it returns a list with 4 arrays all with diferent values

Person myPerson = new Person();
List<Person> personsList = new List<Person>; 

Iterator<Object> itr = objectList.iterator();

while(itr.hasNext())
        {
Object[] innerObj = (Object[]) itr.next();

myPerson.setName(String.valueOf(innerObj [0])
myPerson.setLastName(String.valueOf(innerObj [1])
myPerson.setNickName(String.valueOf(innerObj [2])

personsList.add(myPerson); 
}

当我打印我的人员列表时，里面全是同名的人，姓氏和昵称，是一个充满具有相同值的相同对象的列表.

when I print my persons list is full of persons with the same name, lastName and nick name, is a list full of the same objects with the same values.

推荐答案

每次添加 Person 时，您都想添加一个 不同的 人对吗?

Each time you are adding a Person you want to add a different person right?

因此，您应该每次在循环中创建一个 new Person 对象.不要只在循环之外创建一个您不断更改其数据的数据.

Therefore, you should create a new Person object inside your loop every time. Not create only one outside of the loop whose data you just keep changing.

// NOT HERE Person myPerson = new Person();
// ...

while(itr.hasNext()) {
    Object[] innerObj = (Object[]) itr.next();

    Person myPerson = new Person(); // HERE you create a new Person        
    myPerson.setName(String.valueOf(myArray[0]);
    myPerson.setLastName(String.valueOf(myArray[1]);
    myPerson.setNickName(String.valueOf(myArray[2]);

    personsList.add(myPerson); // add the new person to the list
}

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