在GridBagLayout中控制ScrollPane的缩小行为

import javax.swing.*;
import java.awt.*;

public class ScrollPaneExample {
    public static void main(String[] args) {
        JFrame frame = new JFrame("GridBagLayout with ScrollPane Example");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(400, 300);

        JPanel panel = new JPanel(new GridBagLayout());
        GridBagConstraints gbc = new GridBagConstraints();

        // 创建一个大的文本区域
        JTextArea textArea = new JTextArea(20, 50);
        textArea.setText("Lorem ipsum dolor sit amet, consectetur adipiscing elit. " +
                "Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.");

        // 将文本区域放入滚动窗格
        JScrollPane scrollPane = new JScrollPane(textArea);

        // 设置GridBagConstraints属性
        gbc.gridx = 0;
        gbc.gridy = 0;
        gbc.weightx = 1.0; // 允许组件在水平方向上扩展
        gbc.weighty = 1.0; // 允许组件在垂直方向上扩展
        gbc.fill = GridBagConstraints.BOTH; // 组件填充整个可用空间
        gbc.anchor = GridBagConstraints.CENTER; // 组件居中对齐

        // 将滚动窗格添加到面板
        panel.add(scrollPane, gbc);

        frame.add(panel);
        frame.setVisible(true);
    }
}