利用线程池技术来实现端口扫描（TCP）

// 扫描本机 private void getLocal() {  String ip = getIP();  String portStart = txPortStart1.getText().trim();  String portEnd = txPortEnd1.getText().trim();    if (portStart.length() == 0 || portEnd.length() == 0)   return;    int s = 0;  int e = 0;    try {   s = Integer.valueOf(portStart);   e = Integer.valueOf(portEnd);  } catch (Exception ex) {   JOptionPane.showMessageDialog(null, "端口输入有误");   return;  }     // 检查端口是否超出范围  if (! (checkPort(s) && checkPort(e)))  {   JOptionPane.showMessageDialog(null, "端口应该大于0而小于65535");   return;  }        scann(ip, s, e);    runThread(); // 启动线程, 监视扫描是否已完成 }private String getIP() {  try {   InetAddress addr = InetAddress.getLocalHost();      return addr.getHostAddress().toString(); // ip  }  catch (Exception e)  {   JOptionPane.showMessageDialog(null, "获取IP出错!");  }  return null; }// 扫描单个IP private void scann(String ip, int startPort, int endPort) {  // 将所有按钮设为不可用  setBtnEdit(false);  status.setText("请稍候...");  String[] add = {ip, ""};  table.addRow(add);  exec = Executors.newFixedThreadPool(10);  for (int i = startPort; i <= endPort; i++)   exec.execute(new RunSocket(ip, i));  exec.shutdown();     }