Using Java to detect network connection status

In Windows, you can use the ping command in CMD to detect network connection conditions, as follows:

When the network connection is normal:

When the network is not connected:

In Java, you can call the ping command to determine whether the network is connected properly:

Package Module.system.common;import Java.io.bufferedreader;import Java.io.ioexception;import java.io.InputStream; Import java.io.inputstreamreader;/** * Determine network connection status.    * @author NAGSH * */public class Netstate {public boolean isconnect () {Boolean connect = false;    Runtime runtime = Runtime.getruntime ();         Process Process;try {process = Runtime.exec ("ping" + "www.baidu.com"); InputStream is = Process.getinputstream ();         InputStreamReader ISR = new InputStreamReader (IS);         BufferedReader br = new BufferedReader (ISR);         String line = null;         StringBuffer sb = new StringBuffer ();         while (line = Br.readline ())! = null) {sb.append (line);          } System.out.println ("Return value:" +SB);         Is.close ();         Isr.close ();         Br.close ();             if (null! = SB &&!sb.tostring (). Equals ("")) {String logstring = ""; if (sb.tostring (). IndexOf ("TTL") > 0) {//network unblocked connect = True            } else {//network not unblocked connect = false;         }}} catch (IOException e) {e.printstacktrace ();}    return connect; }public static void Main (string[] args) {netstate netstate = new Netstate (); System.out.println (Netstate.isconnect ());}}

Using Java to detect network connection status