android - HashMap 访问同一个 ArrayList

Question

我正在尝试用新的学生值更新 HashMap，请检查我遗漏了什么。

ArrayList<Student> tempStudentList = XMLParser.studentHashMap.get(currentSectionName);

if(studentList==null)
{

    Log.v(CURRENT_SCREEN,"created another student list for section name:"+currentSectionName);
    tempStudentList = new ArrayList<Student>();

} 
Log.v(CURRENT_SCREEN,"Added student to the list");

tempStudentList.add(currentStudent);

XMLParser.studentHashMap.put(currentSectionName, tempStudentList);

Answer 1

我想你想在 null 检查时写 tempStudentList 而不是 studentList。