java的swing如何编写点击一次按键在JTextArea显示一行字

lz 你好 具体代码如下:import javax.swing.*;import java.awt.*;import java.awt.event.*;import java.io.*;public class ShowInfo extends JFrame{private JTextArea show;private JButton go;//初始化窗口public ShowInfo(){super("ShowInfo");setLayout(new FlowLayout(FlowLayout.CENTER, 50, 30)...