Question

我的JLabel组件的定位存在小问题。

代码：

    public class delete {


    public static void main(String[] args){
         GridBagConstraints gbc = new GridBagConstraints();

        //Adding the JPanels. Panel for instructions
        JPanel panel = new JPanel();
        panel.setLayout(new GridBagLayout());

        //JLabel for the Instructions.
        JLabel label = new JLabel("<html> Instructions: Type in the grades you’ve received, along with the weights they’ll have in the determination of your overall average. <br> After you press ‘Calculate’, the results will show your average so far. <br> Every grade you enter must be a non-negative number, and every percentage/weight you enter must be a positive number :)</html>");
        gbc.gridwidth = 2;
        gbc.fill = GridBagConstraints.HORIZONTAL;
        gbc.anchor = GridBagConstraints.PAGE_START;
        gbc.weighty = 1;
        panel.add(label, gbc);


        //JLabel1 for Assingment/Grade/Weight(Percent)
        JLabel label1 = new JLabel("<html><pre>Assingment\t\t\t\t\tWeight\t\t\t\t\tPercentage</pre></html>");
        gbc.gridx = 0;
        gbc.gridy = 0;
        panel.add(label1, gbc);


        //New frame set
        JFrame frame = new JFrame("Grade Calculator");
        frame.setVisible(true);
        frame.setSize(750,500);
        frame.setDefaultCloseOperation(EXIT_ON_CLOSE);
        frame.add(panel);



    }


}

现在，现在将JLabel（label）置于框架的顶部，这就是我想要的。问题是JLabel（label1）我希望label1略低于标签。

如果我设置gbc.gridy = 0，则label1会在标签顶部显示，使两个单独的碰撞在一起。

当我设置gbc.gridy = 1时，label1一直到框架的底部。

现在我希望label1略微标记，但我不能使用gridy的浮点数。我怎样才能解决这个问题？

Answer 1

gbc.weighty = 1;导致为组件提供布局完所有组件后剩余的所有剩余空间。您应该仅将label提供给<{1}}，而不是向label1提供此约束

当您未向组件提供gridx / gridy时，GridBagLayout会将组件放在最后一个组件旁边，因为没有添加其他组件，{{1} }位于顶部，但您还提供label / gridx gridy 0到label1，它位于同一位置。

相反，label位于0x0而label1位于0x1

JLabel label = new JLabel("<html> Instructions: Type in the grades you’ve received, along with the weights they’ll have in the determination of your overall average. <br> After you press ‘Calculate’, the results will show your average so far. <br> Every grade you enter must be a non-negative number, and every percentage/weight you enter must be a positive number :)</html>");

gbc.gridwidth = 2;
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.gridy = 0;
panel.add(label, gbc);

//JLabel1 for Assingment/Grade/Weight(Percent)
JLabel label1 = new JLabel("<html><pre>Assingment\t\t\t\t\tWeight\t\t\t\t\tPercentage</pre></html>");
gbc.gridx = 0;
gbc.gridy = 1;
gbc.anchor = GridBagConstraints.NORTH;
gbc.weighty = 1;
panel.add(label1, gbc);

您还可以通过使用anchor属性来影响组件在其单元格中对齐的位置。

GridBagLayout

请查看How to Use GridBagLayout了解更多详情

如果不完全知道你正在做什么，我可能会建议你看看How to Use Tables

Answer 2

//JLabel for the Instructions.
JLabel label = new JLabel("<html> Instructions: Type in the grades you’ve received, along with the weights they’ll have in the determination of your overall average. <br> After you press ‘Calculate’, the results will show your average so far. <br> Every grade you enter must be a non-negative number, and every percentage/weight you enter must be a positive number :)</html>");
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.weighty = 1;
gbc.gridx = 0;
gbc.gridy = 0;
panel.add(label, gbc);


//JLabel1 for Assingment/Grade/Weight(Percent)
JLabel label1 = new JLabel("<html><pre>Assingment\t\t\t\t\tWeight\t\t\t\t\tPercentage</pre></html>");
gbc.gridx = 0;
gbc.gridy = 1;
panel.add(label1, gbc);

JLabel / JPanel定位问题。（GridBagLayout的）

2 个答案:

JLabel / JPanel定位问题。 （GridBagLayout的）

2 个答案:

JLabel / JPanel定位问题。（GridBagLayout的）