java不合理的jtextfield大小调整问题

Question

我已经搜索过这样的所有问题,但我找不到解决方案.

public class FormPanel extends JPanel
{
    private JLabel namelabel;
    private JLabel occlabel;
    private JTextField nametext;
    private JTextField occtext;
    private JButton okButton;

    public FormPanel() {
        Dimension dim = getPreferredSize();
        dim.width = 250;
        setPreferredSize(dim);
        namelabel = new JLabel("Name : ");
        occlabel = new JLabel("Occupation : ");
        nametext = new JTextField();
        nametext.setPreferredSize(new Dimension(80,20));
        occtext = new JTextField();
        occtext.setColumns(20);
        okButton = new JButton("OK");

        Border inner = BorderFactory.createTitledBorder("Add Person : ");
        Border outer = BorderFactory.createEmptyBorder(5,5,5,5);

        setBorder(BorderFactory.createCompoundBorder(inner,outer));
        setLayout(new GridBagLayout());
        GridBagConstraints gc = new GridBagConstraints();
        gc.gridx = 0;
        gc.gridy = 0;
        gc.weightx = 1;
        gc.weighty = 1;
        gc.fill = GridBagConstraints.NONE;

        add(namelabel,gc);
        gc.gridx = 1;
        gc.gridy = 0;
        add(nametext,gc);

        gc.gridy = 1;
        gc.gridx = 0;
        add(occlabel,gc);

        gc.gridy = 1;
        gc.gridx = 1;
        add(occtext,gc);

        gc.gridy = 2;
        gc.gridx = 1;
        add(okButton,gc);

    }
}

nametext而且occtext非常小.我尝试了新的JTextField(20)和字符串版本,我尝试了setPreferredSize作为上面的类,我也尝试了setColumn,但没有一个工作.

Answer 1

摆脱setPreferredSize(dim);.通过调用pack()顶级窗口让GUI大小本身,你的问题可能会消失.您正在限制容器的大小可能小于最佳容器,并且通过这样做,GridBagLayout将以一种糟糕的方式收缩其组件,包括您的JTextField.