java - 在 ArrayList 中显示 ArrayList 的内容

Question

我目前正在制定一个计划，将搭乘航类的乘客添加到该计划中，并提供名字、姓氏和每周积分。然后我需要列出每个乘客的积分。我想让它在输出时看起来像这样:

john doe 100 200 300 400
jerry glock 123 400 345 200

等等。我不能使用普通数组或二维数组，因为我不知道会有多少乘客。

ArrayList <ArrayList<String>> passengers = new ArrayList <ArrayList<String>>();
ArrayList <String> firstName = new ArrayList <String> ();
ArrayList <String> lastName = new ArrayList <String> ();
ArrayList <String> weekOne = new ArrayList <String> ();
ArrayList <String> weekTwo = new ArrayList <String> ();
ArrayList <String> weekThree = new ArrayList <String> ();
ArrayList <String> weekFour = new ArrayList <String> ();
int numOfPas = 0;

private void addButtonActionPerformed(java.awt.event.ActionEvent evt) {                                          
    String firstN = firstNameInput.getText();
    firstName.add(firstN);
    String lastN = lastNameInput.getText();
    lastName.add(lastN);
    String week1 = weekOneInput.getText();
    weekOne.add(week1);
    String week2 = weekTwoInput.getText();
    weekTwo.add(week2);
    String week3 = weekThreeInput.getText();
    weekThree.add(week3);
    String week4 = weekFourInput.getText();
    weekFour.add(week4);
    listButton.setEnabled(true);
    numOfPas++;
}

private void listButtonActionPerformed(java.awt.event.ActionEvent evt) {                                           
        String output = "";
        passengers.add(firstName);
        passengers.add(lastName);
        passengers.add(weekOne);
        passengers.add(weekTwo);
        passengers.add(weekThree);
        passengers.add(weekFour);
        for (int x=0; x<passengers.size(); x++) {
             for (int y=0; y< numOfPas; y++) {
                 output = output + " " + passengers.get(x).get(y);
             }
             output = output + "\n";
        }

        outputField.setText(output);
    }

问题在于它显示的内容更像是这样的:

john jerry
doe glock
100 123
200 400
300 345
400 200

我还需要一种方法来查找各个乘客每周的积分，尽管我还没有做到这一点。

Answer 1

我认为应该是:

  for (int y=0; y< numOfPas; y++) {
        for (int x=0; x<passengers.size(); x++) {
             output = output + " " + passengers.get(x).get(y);
         }
         output = output + "\n";
    }