Java Utililty Methods Socket Port

int port = 0;
try {
    ServerSocket s = new ServerSocket(0);
    port = s.getLocalPort();
    s.close();
    return port;
} catch (IOException e) {
return port;

String h = s.getInetAddress().getHostAddress().toString();
int port = s.getPort();
return h + ":" + port;

return serverSocket.getLocalPort();

int port = server.getLocalPort();
try {
    server.close();
} catch (IOException e) {
    e.printStackTrace();
return port;

for (int port = 900; port < Short.MAX_VALUE; port++) {
    try {
        return new ServerSocket(port);
    } catch (IOException e) {
        continue;
throw new IOException("No free port found.");
...

ServerSocket v_Ret = null;
try {
    v_Ret = new ServerSocket(i_Port);
} catch (Exception exce) {
    v_Ret = null;
return v_Ret;

try {
    Socket s = new Socket(host, port);
    boolean connected = s.isConnected();
    try {
        s.close();
    } catch (Exception e) {
    return connected;
...

if (ss == null)
    return;
try {
    ss.close();
} catch (IOException e) {
    e.printStackTrace();
return;
...

try {
    Socket socket = sockets.get(host + ":" + port);
    if (socket != null) {
        socket.close();
        sockets.remove(host + ":" + port);
} catch (IOException e) {
    e.printStackTrace();
...

long notAfter = System.currentTimeMillis() + 5000;
for (; System.currentTimeMillis() < notAfter;) {
    Socket sock = null;
    try {
        Thread.sleep(100);
        sock = new Socket("127.0.0.1", port);
        break;
    } catch (Exception ex) {
...