Java中JTextArea如何添加滚动条

Java中JTextArea如何添加滚动条

示例

代码

package com.test;

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

public class Test extends JFrame {

    JMenuBar jb;
    JTextArea ja;
    JScrollPane jsp;

    public void setImage() {
        jb = new JMenuBar();
        this.setJMenuBar(jb);
        ja = new JTextArea();
        jsp = new JScrollPane(ja);

        this.setSize(600, 400);
        this.setLayout(new BorderLayout());
        this.add(jsp);
        this.setVisible(true);
    }

    public static void main(String[] args) {
        Test a = new Test();
        a.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        a.setImage();

    }

}