面板

Jpanel

package com.wang.gui.lesson05;

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

public class JpanelDemo extends JFrame {
    public JpanelDemo(){
        Container container = this.getContentPane();
        container.setLayout(new GridLayout(2,1,10,10));

        JPanel panel = new JPanel(new GridLayout(1, 3));
        panel.add(new Button("1"));
        panel.add(new Button("1"));
        panel.add(new Button("1"));

        container.add(panel);

        this.setVisible(true);
        this.setBounds(200,200,500,500);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

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

JScrollPane

package com.wang.gui.lesson05;

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

public class JScrollDemo extends JFrame {
    public JScrollDemo(){
        Container container = this.getContentPane();

        //文本域
        JTextArea textArea = new JTextArea(20, 50);
        textArea.setText("一起学习java！");


        //Scroll面板
        JScrollPane scrollPane = new JScrollPane(textArea);
        container.add(scrollPane);

        this.setVisible(true);
        this.setBounds(100,100,300,350);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

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