容器中可以有多個JPanel面板，一個JPanel面板中可以有多個控件。

滾動面板 JScrollPane中只能有一個控件。

public class Demo extends JFrame {
    public Demo() {
        setBounds(100, 100, 600, 200);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        Container c = getContentPane();
        c.setLayout(new GridLayout(1, 2, 10, 10));
        
 
//創建2個面板
        JPanel p1 = new JPanel();
        p1.setLayout(new GridLayout(1, 3));
        JPanel p2 = new JPanel(new BorderLayout());
        p2.setBackground(Color.BLUE);
        //設置面板邊框，標題
        p1.setBorder(BorderFactory.createTitledBorder("面板1"));
        p2.setBorder(BorderFactory.createTitledBorder(
 
"面板2"));
        p1.add(new JButton("b1"));
        p1.add(new JButton("b1"));
        p1.add(new JButton("b1"));
        p1.add(new JButton("b1"));
        p2.add(new JButton("b2"), BorderLayout.EAST);
        p2.add(new JButton("b2"), BorderLayout.WEST);
        p2.add(new JButton("b2"), BorderLayout.SOUTH);
        p2.add(
 
new JButton("b2"), BorderLayout.NORTH);
        p2.add(new JButton("b2"));
        c.add(p1);
        c.add(p2);
        setVisible(true);
    }

    public static void main(String[] args) {
        new Demo();
    }
}

public class Demo extends JFrame {
    public Demo() {
        setBounds(100, 100, 200, 100);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        Container c = getContentPane();
        JTextArea area=new JTextArea();//文本域
        JScrollPane sp=new JScrollPane(area);//將文本域添加到滾動面板中
        c.add(sp);
        setVisible(true);
    }

    public static void main(String[] args) {
        new Demo();
    }
}

面板 JPanel