Question

我在JTextArea中有一个JDialog。 JDialog使用GridLayout。

我想在JTextArea的每一行上使用7位数字（每行将是7个int注册号）。出于用户体验的原因，我希望JTextArea添加一行或当一行达到7个字符时停止扩展。

无效的东西： -在JTextArea构造函数中指定列数 -matriculesText.setLineWrap(true);和matriculesText.setWrapStyleWord(true);

恐怕uploadDialogManager.setHgap(20);可能会破坏代码。我想知道JDialog是否应该具有固定大小。

这就是我构造JDialog的方式：

// initialization
    Dialog uploadParent = null;
    JDialog uploadDialog = new JDialog(uploadParent);
    GridLayout uploadDialogManager = new GridLayout(UPLOAD_DIALOG_ROWS, 
UPLOAD_DIALOG_COLUMNS);

    // uploadDialog properties
    uploadDialog.setSize(new Dimension(UPLOAD_DIALOG_WIDTH, UPLOAD_DIALOG_HEIGHT));
    uploadDialog.setLayout(uploadDialogManager);
    uploadDialog.setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);

    //Set up the horizontal gap value
    uploadDialogManager.setHgap(20);
    //Set up the vertical gap value
    uploadDialogManager.setVgap(20);
    //Set up the layout of the buttons
    //uploadDialogManager.layoutContainer();

    // components initialization
    JLabel exerciceLabel = new JLabel("exercice number : ");
    JComboBox<Integer> exerciceNumbers = new JComboBox<Integer> 
  (EXERCICE_NUMBERS);
    JLabel matriculeLabel = new JLabel("please enter your matricules, one per 
  line : ");
    JTextArea matriculesText = new JTextArea(1, 1);
    JButton confirm = new JButton("confirm");
    JButton cancel = new JButton("cancel");

    matriculesText.setLineWrap(true);
    matriculesText.setWrapStyleWord(true);

Answer 1

我提出了另一种满足我要求的解决方案。我使用select p.id, p.name from ( select 'Alice' as name from dual union all select 'Bob' from dual union all select 'Alice' from dual ) searched s join people p on p.name = s.name;来检查每行是否包含7位数字（MATRICULE_REGEX），而不是到达7个字符时换行。如果没有，我将拒绝1\\d{6}内容。

JTextArea

每条JTextArea行上的字符数限制

1 个答案: