Question

我已经搜索过这样的所有问题，但我无法找到解决方案。

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和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，我也尝试过setColumn，但没有一个可以工作。

Answer 1

摆脱setPreferredSize(dim);。通过在顶级窗口调用pack()让GUI大小本身，你的问题可能会消失。您将容器的大小限制在可能小于最佳容器的范围内，这样，GridBagLayout将以一种糟糕的方式收缩其组件，包括您的JTextFields。

Answer 2

如果您使用pack()，则设置dim.height可能是个好主意。

Dimension dim = getPreferredSize();
dim.width = 500;
dim.height = 200;
setPreferredSize(dim);

namelabel = new JLabel("Name : ");
nametext = new JTextField();

occlabel = new JLabel("Occupation : ");
occtext = new JTextField();

okButton = new JButton("OK");

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

GridBagLayout gl = new GridBagLayout();
GridBagConstraints gc = new GridBagConstraints();
setLayout(gl);

gc.fill = GridBagConstraints.HORIZONTAL;
gc.gridwidth = 1;
add(namelabel, gc);

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

gc.gridx = 1;
gc.gridy = 0;
gc.weightx = .5;
add(nametext, gc);

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

gc.fill = GridBagConstraints.NONE;
gc.anchor = GridBagConstraints.EAST;
gc.gridy = 2;
gc.gridx = 1;
gc.weightx = 0;
gc.insets = new Insets(10,0,0,0);
add(okButton, gc);

java不合理的jtextfield大小调整问题

2 个答案: