Java:如何同时放置Paintcomponet和其他组件？

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

public class MyFrame extends JFrame {
    public MyFrame() {
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLayout(new BorderLayout());

        JPanel paintPanel = new JPanel();
        // 添加PaintComponent组件到中央区域
        add(paintPanel, BorderLayout.CENTER);

        JPanel otherPanel = new JPanel();
        // 添加其他组件到南区域
        add(otherPanel, BorderLayout.SOUTH);

        pack();
        setVisible(true);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(() -> new MyFrame());
    }
}

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

public class MyFrame extends JFrame {
    public MyFrame() {
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLayout(new GridLayout(2, 1)); // 2行1列的网格布局

        JPanel paintPanel = new JPanel();
        // 添加PaintComponent组件到第一个网格
        add(paintPanel);

        JPanel otherPanel = new JPanel();
        // 添加其他组件到第二个网格
        add(otherPanel);

        pack();
        setVisible(true);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(() -> new MyFrame());
    }
}

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

public class MyFrame extends JFrame {
    public MyFrame() {
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLayout(new FlowLayout());

        JPanel paintPanel = new JPanel();
        // 添加PaintComponent组件
        add(paintPanel);

        JPanel otherPanel = new JPanel();
        // 添加其他组件
        add(otherPanel);

        pack();
        setVisible(true);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(() -> new MyFrame());
    }
}