模拟Ping操作的一个Java类

本文为大家分享了模拟ping操作的一个java类，具体内容如下

import java.io.ioexception;
import java.net.inetaddress;
import java.net.unknownhostexception;
 
/**
 * created by qiuju
 * on 2014/9/21.
 */
public class simpleping implements runnable {
 private final object mendlock = new object();
 private boolean isend = false;
 
 private int arrivedcount = 0;
 
 private int count;
 private int timeout;
 private string name;
 
 private int mendcount;
 private string mip = null;
 private float mlossrate = 1f;
 private float mdelay = 0;
 
 
 public simpleping(string name, int count, int timeout) {
  count = mendcount = count;
  timeout = timeout;
  name = name;
  for (int i = 0; i < mendcount; i++) {
   thread thread = new thread(this);
   thread.setdaemon(true);
   thread.start();
  }
  if (!isend) {
   try {
    synchronized (mendlock) {
     mendlock.wait();
    }
   } catch (interruptedexception e) {
    e.printstacktrace();
   }
  }
 }
 
 private void setend(boolean isarrived, long delay, string ip) {
  synchronized (mendlock) {
   count--;
   if (isarrived) {
    arrivedcount++;
    mdelay = (mdelay + delay) / 2f;
    if (ip != null)
     mip = ip;
   }
  }
  if (count == 0)
   setend();
 }
 
 private void setend() {
  mlossrate = (mendcount - arrivedcount) / mendcount;
 
  isend = true;
  synchronized (mendlock) {
   mendlock.notifyall();
  }
 }
 
 @override
 public void run() {
  long delay = 0;
  boolean isarrived = false;
  string ip = null;
  try {
   long starttime = system.currenttimemillis();
   inetaddress address = inetaddress.getbyname(name);
   isarrived = address.isreachable(timeout);
   delay = system.currenttimemillis() - starttime;
   ip = address.gethostaddress();
  } catch (unknownhostexception e) {
   e.printstacktrace();
  } catch (ioexception e) {
   e.printstacktrace();
  } catch (exception e) {
   e.printstacktrace();
  } finally {
   setend(isarrived, delay, ip);
  }
 }
 
 public string getip() {
  return mip;
 }
 
 public float getlossrate() {
  return mlossrate;
 }
 
 public float getdelay() {
  return mdelay;
 }
 
 public boolean getissucceed() {
  return arrivedcount > 0;
 }
}

在类中使用的是：

long starttime = system.currenttimemillis();
   inetaddress address = inetaddress.getbyname(name);
   isarrived = address.isreachable(timeout);
   delay = system.currenttimemillis() - starttime;
   ip = address.gethostaddress();

其中的：address.isreachable(timeout);方法，但是这个方法有一定局限性；当是root模式下会发送icmp进行ping操作，这就比较真实了；但是如果是非root模式下则是使用的socket进行的模拟。
之所以说是中间类，也就是因为这个原因没有采用这个类。

以上就是本文的全部内容，希望对大家的学习有所帮助。