java - 在 joptionpane 框中设置大小

Question

我有以下代码。我在 joptionpane 的面板中添加了一个 textArea，但是框的框架尺寸太小，textArea 不适合它。那么，我怎样才能扩大 joptionpane 框。

    JPanel p = new JPanel(new BorderLayout(5,5));

        JPanel labels = new JPanel(new GridLayout(0,1,2,2));
        labels.add(new JLabel("Name", SwingConstants.RIGHT));
        labels.add(new JLabel("Description", SwingConstants.RIGHT));
        p.add(labels, BorderLayout.WEST);


        JPanel controls = new JPanel(new GridLayout(0,1,4,4));
        JTextField name = new JTextField();
        controls.add(name);
        JTextArea description = new JTextArea();
   //     description.addAncestorListener(new RequestFocusListener(false));
        controls.add(description);
        p.add(controls, BorderLayout.CENTER);

        int result = JOptionPane.showConfirmDialog(null, p, "Create Atomic Action", JOptionPane.OK_CANCEL_OPTION);

        if(result == JOptionPane.OK_OPTION)
        {
           System.out.println("Yes press Name"+name.getText()+"  "+description.getText());
        }else
            System.out.println("Cancel press");

Answer 1

除了设置首选大小之外，正如 @dpassy 建议的那样，我还添加了一个 ScrollPane 组件，以便您可以添加更多文本(多于对话框中可以显示的文本)并向下滚动到底部。我还将布局从 GridLayout 更改为 BorderLayout，以便 TextBox 不会不必要地增长以填充空间。

package test;

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.GridLayout;

import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.SwingConstants;

public class Test {

    public static void main(String[] args) {
        JPanel p = new JPanel(new BorderLayout(5, 5));

        JPanel labels = new JPanel(new BorderLayout());
        labels.add(new JLabel("Name", SwingConstants.RIGHT),BorderLayout.NORTH);
        labels.add(new JLabel("Description", SwingConstants.RIGHT), BorderLayout.CENTER);
        p.add(labels, BorderLayout.WEST);

        JPanel controls = new JPanel(new BorderLayout());
        JTextField name = new JTextField();
        controls.add(name, BorderLayout.NORTH);
        JTextArea description = new JTextArea();
        JScrollPane sp = new JScrollPane(description);
        // description.addAncestorListener(new RequestFocusListener(false));
        sp.setPreferredSize(new Dimension(400, 100));
        controls.add(sp, BorderLayout.CENTER);
        p.add(controls, BorderLayout.CENTER);

        JOptionPane.showConfirmDialog(null, p, "Create Atomic Action", JOptionPane.OK_CANCEL_OPTION);
    }
}

结果，它将显示此对话框:

当您在 TextArea 中添加文本时，它也会显示滚动条。