java - 更新arraylist中的元素，还有比这更好的方法吗？

Question

我正在使用 swing 制作一个简单的应用程序，对于数组列表和列表迭代器我是新手。我想做的是一个按钮，允许您更新数组列表中人员的信息。我应该在不使用 for 或 for-each 循环的情况下执行此操作。这是我的代码:

String searchedName = JOptionPane.showInputDialog(null, "Type in the first name of the person you want to update:");
ListIterator<Student> listIt = peopleArray.listIterator();
    while(listIt.hasNext()){
        String firstname = listIt.next().getFirstname();
            if(searchedName.equalsIgnoreCase(firstname){
                String newFirstname = JOptionPane.showInputDialog(null, "Input new first name:");
                String newLastname = JOptionPane.showInputDialog(null, "Type in new last name:");
                String newEmail = JOptionPane.showInputDialog(null, "Type in new email:");
                String newOccupation = JOptionPane.showInputDialog(null, "Type in new occupation:");
                listIt.previous().setFirstname(newFirstname);
                listIt.next().setLastname(newLastname);
                listIt.previous().setEmail(newEmail);
                listIt.next().setOccupation(newOccupation);
    }
}

这段代码可以工作，但看起来很奇怪。我是否必须像这样跳回第四个(listIt.next()然后listIt.previous())还是有更好的方法？

//N

Answer 1

你不必来回跳转，确保只调用一次 next() 。这个怎么样:

    String searchedName = JOptionPane.showInputDialog(null, "Type in the first name of the person you want to update:");
        ListIterator<Student> listIt = peopleArray.listIterator();
            while(listIt.hasNext()){
                Student studentToUpdate = listIt.next();
                    if(searchedName.equalsIgnoreCase(studentToUpdate.getFirstname()){
                        String newFirstname = JOptionPane.showInputDialog(null, "Input new first name:");
                        String newLastname = JOptionPane.showInputDialog(null, "Type in new last name:");
                        String newEmail = JOptionPane.showInputDialog(null, "Type in new email:");
                        String newOccupation = JOptionPane.showInputDialog(null, "Type in new occupation:");
                        studentToUpdate.setFirstname(newFirstname);
                        studentToUpdate.next().setLastname(newLastname);
                        studentToUpdate.setEmail(newEmail);
                        studentToUpdate.setOccupation(newOccupation);
            }
        }