java从入门到精髓 -Swing高级JProgressBarTest进度条

import java.awt.BorderLayout; import java.awt.FlowLayout; import javax.swing.JButton; import javax.swing.JFileChooser; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.SwingConstants; import javax.swing.filechooser.*; import javax.swing.*; public class JProgressBarTest extends JFrame{ public JProgressBarTest() { super(); setTitle("表格"); setBounds(100,100,350,150); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); final JButton button = new JBu