Java Utililty Methods HTTP Port Find

int port = -1;
try {
    ServerSocket server = new ServerSocket(0);
    port = server.getLocalPort();
    server.close();
} catch (IOException exception) {
    port = -1;
return port;

int initialP = 60000;
int finalP = 61000;
for (int i = initialP; i < finalP; i++) {
    int port = new Random().nextInt(finalP - initialP) + initialP;
    ServerSocket ss = null;
    DatagramSocket ds = null;
    try {
        ss = new ServerSocket(port);
...

ServerSocket ss = null;
try {
    ss = new ServerSocket();
    ss.bind(null);
    return ss.getLocalPort();
} catch (IOException e) {
    return getRandomPort();
} finally {
...

ServerSocket ss = null;
try {
    ss = new ServerSocket();
    ss.bind(null);
    return ss.getLocalPort();
} catch (IOException e) {
    return getRandomPort();
} finally {
...

try (ServerSocket socket = new ServerSocket(0)) {
    return socket.getLocalPort();
} catch (IOException e) {
    throw new IllegalStateException("Cannot find available port: " + e.getMessage(), e);

ServerSocket serverside = null;
int port = 0;
try {
    serverside = new ServerSocket(0);
    port = serverside.getLocalPort();
} catch (IOException exception) {
    exception.printStackTrace();
} finally {
...

try (final ServerSocket ss = new ServerSocket(0)) {
    return ss.getLocalPort();
} catch (final IOException e) {
    throw new IllegalStateException("Unable to get local port: no ports available");

try {
    try (final ServerSocket serverSocket = new ServerSocket(0)) {
        return serverSocket.getLocalPort();
} catch (IOException e) {
    throw new IllegalStateException(e);

for (int i = 0; i < 50; i++) {
    ServerSocket serverSocket = null;
    try {
        serverSocket = new ServerSocket(0);
        int port = serverSocket.getLocalPort();
        if (port != 0) {
            return port;
    } finally {
        serverSocket.close();
throw new IOException("could not find free port");

return availablePort(0);