GridBag面板没有占用所有空间

时间:2013-04-28 21:50:20

标签: java swing user-interface

我正在尝试列出列中带标签的行列表。我正在尝试使用gridbaglayout,但我遇到了一个问题。当我展开窗口时,它不会扩展。这是发生的事情: enter image description here

我真正想要的是布局中的单元格占据空间的1/5,标签移动到单元格的最左侧部分。

   public static JPanel createLayout(int rows) {
    JPanel product = new JPanel(new GridBagLayout());
    String[] lables = {"School", "Advanced #", "Novice #"};
    double weight = 1/(lables.length);
    for (int i = 0; i < rows; i++) {
        GridBagConstraints c = new GridBagConstraints();
        c.insets = new Insets(3, 3, 3, 3);
        c.anchor = GridBagConstraints.WEST;
        c.gridx = i;
        c.weightx = weight;
        c.fill = GridBagConstraints.HORIZONTAL;
        c.anchor = GridBagConstraints.NORTHWEST;
        for (int j = 0; j < lables.length; j++) {

            JLabel l = new JLabel(lables[j]);
            product.add(l, c);
        }
    }
    return product;
}

public static void main(String[] args) throws IOException {
    JFrame frame = new JFrame("Debate Calculator");
    JPanel debates = new JPanel();
    frame.add(createLayout(5), BorderLayout.CENTER);
    frame.pack();
    frame.setVisible(true);
     }

1 个答案:

答案 0 :(得分:2)

我认为问题在于你的体重计算...

double weight = 1/(lables.length);

由于1lables.length都是int值,因此Java会自动将结果转换为int0)。

相反,尝试类似......

double weight = 1d/(double)lables.length;