阿洲程式天地

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

public class SimpleGui implements ActionListener{
  JTextArea text;
  public static void main(String[] args) {
    SimpleGui test = new SimpleGui();
    test.go();
  }
  public void go(){
    JFrame frame = new JFrame();
    JPanel panel = new JPanel();
    JButton button = new JButton("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_NEVER);
    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");
  }
}