How to ping a device with Java

public class Pinger {
// byte[] addr1 = new byte[]{(byte)192,(byte)168,(byte)2,(byte)5};

public static long testDBConn(byte[] addr1, int port, int timeoutMs) {
//pass in a byte array with the ipv4 address, the port & the max time
out required
long start = -1; //default check value
long end = -1; //default check value
long total = -1; // default for bad connection

//make an unbound socket
Socket theSock = new Socket();

try {
InetAddress addr = InetAddress.getByAddress(addr1);

SocketAddress sockaddr = new InetSocketAddress(addr, port);

// Create the socket with a timeout
//when a timeout occurs, we will get timout exp.
//also time our connection this gets very close to the real time
start = System.currentTimeMillis();
theSock.connect(sockaddr, timeoutMs);
end = System.currentTimeMillis();
} catch (UnknownHostException e) {
start = -1;
end = -1;
} catch (SocketTimeoutException e) {
start = -1;
end = -1;
} catch (IOException e) {
start = -1;
end = -1;
} finally {
if (theSock != null) {
try {
theSock.close();
} catch (IOException e) {
}
}

if ((start != -1) && (end != -1)) {
total = end - start;
}
}

return total; //returns -1 if timeout
}
}

public static void main(String[] args) {

// byte[] addr1 = new
byte[]{(byte)192,(byte)168,(byte)2,(byte)5};
int port = 1521;
int timeoutMs = 2000; // 2 seconds
long value = testDBConn(addr1, port, timeoutMs);
System.out.println(value);
}