Java terminates the thread by closing Socket

This article shares the specific code for Java to close Socket to terminate the thread, for your reference, the specific content is as follows

package Threads;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.Socket;

/**
 * Created by Frank
 */
public class StopClose extends Thread {
  protected Socket io;

  public void run() {
    try {
      io = new Socket("java.sun.com", 80);
      BufferedReader is = new BufferedReader(new InputStreamReader(io.getInputStream()));
      System.out.println("StopClose reading");

      /**
       *  Deadlock because before reading the response, HTTP Instruct client to send 1 A request (like GET/HTTP/1.0 ) and 1 A blank line 
       */
      String line = is.readLine();

      /**
       *  So we'll never get here 
       */
      System.out.printf("StopClose FINISHED after reading %s!", line);

    } catch (IOException ex) {
      System.out.println("StopClose terminating:" + ex);
    }
  }

  public void shutDown() throws IOException {
    if (io != null) {
      synchronized (io) {
        io.close();
      }
    }
    System.out.println("StopClose.shutDown() complete");
  }

  public static void main(String[] args) throws InterruptedException, IOException {
    StopClose t = new StopClose();
    t.start();
    sleep(1000*5);
    t.shutDown();
  }
}