public class CheckUpdate extends JFrame {
JFrame c = this;
public CheckUpdate() {
//设置窗体属性
setAttb();
JLabel title = new JLabel("正在检查网络上的更新资源...");
this.add(title, BorderLayout.NORTH);
JTextArea msg = new JTextArea();
this.add(msg, BorderLayout.CENTER);
JLabel process = new JLabel();
this.add(process, BorderLayout.SOUTH);