例: Swing レイアウトを使用したネストのデモ

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

public class NestedLayoutExample extends JFrame {
    public NestedLayoutExample() {
        // 设置窗口标题
        setTitle("嵌套布局示例");

        // 创建容器
        Container container = getContentPane();

        // 创建顶层布局
        BorderLayout borderLayout = new BorderLayout();
        container.setLayout(borderLayout);

        // 创建 North 区域的组件
        JLabel northLabel = new JLabel("North 区域");
        northLabel.setHorizontalAlignment(JLabel.CENTER);
        container.add(northLabel, BorderLayout.NORTH);

        // 创建 South 区域的组件
        JPanel southPanel = new JPanel();
        FlowLayout flowLayout = new FlowLayout();
        southPanel.setLayout(flowLayout);
        JButton southButton1 = new JButton("Button1");
        JButton southButton2 = new JButton("Button2");
        southPanel.add(southButton1);
        southPanel.add(southButton2);
        container.add(southPanel, BorderLayout.SOUTH);

        // 创建 Center 区域的组件
        JPanel centerPanel = new JPanel();
        GridLayout gridLayout = new GridLayout(2, 2);
        centerPanel.setLayout(gridLayout);
        JButton centerButton1 = new JButton("Button1");
        JButton centerButton2 = new JButton("Button2");
        JButton centerButton3 = new JButton("Button3");
        JButton centerButton4 = new JButton("Button4");
        centerPanel.add(centerButton1);
        centerPanel.add(centerButton2);
        centerPanel.add(centerButton3);
        centerPanel.add(centerButton4);
        container.add(centerPanel, BorderLayout.CENTER);

        // 设置窗口大小、位置和可见性
        setSize(400, 300);
        setLocationRelativeTo(null);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setVisible(true);
    }

    public static void main(String[] args) {
        // 创建 NestedLayoutExample 对象
        new NestedLayoutExample();
    }
}