JAVA简单的UI设计

package SwingGui.sky.com;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class SimpleGui implements ActionListener {
    JTextArea text;
    public static void main(String [] args) {
        SimpleGui gui = new SimpleGui();
        gui.go();
        
        
        
    }
    public void go() {
        JFrame frame = new JFrame();
        JPanel panel = new JPanel();
        JButton button = new JButton("Just Click It");
        button.addActionListener(this);
        text = new JTextArea(10, 20);
        text.setLineWrap(true);
        
        JScrollPane scroller = new JScrollPane(text);
        scroller.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
        scroller.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS);
        
        panel.add(scroller);
        
        frame.getContentPane().add(BorderLayout.CENTER, panel);
        frame.getContentPane().add(BorderLayout.SOUTH, button);
        
        frame.setSize(350, 300);
        frame.setVisible(true);
        }
    public void actionPerformed(ActionEvent ev) {
        text.append("Button Clicked \n");
    }
    
}