如何ping IP地址 [英] How to ping an IP address

问题描述

我正在使用这部分代码来ping java中的ip地址，但只有ping localhost成功，而对于其他主机，程序说主机无法访问。
我禁用了我的防火墙但仍然遇到此问题

I am using this part of code to ping an ip address in java but only pinging localhost is successful and for the other hosts the program says the host is unreachable. I disabled my firewall but still having this problem

public static void main(String[] args) throws UnknownHostException, IOException {
    String ipAddress = "127.0.0.1";
    InetAddress inet = InetAddress.getByName(ipAddress);

    System.out.println("Sending Ping Request to " + ipAddress);
    System.out.println(inet.isReachable(5000) ? "Host is reachable" : "Host is NOT reachable");

    ipAddress = "173.194.32.38";
    inet = InetAddress.getByName(ipAddress);

    System.out.println("Sending Ping Request to " + ipAddress);
    System.out.println(inet.isReachable(5000) ? "Host is reachable" : "Host is NOT reachable");
}

输出为：

将Ping请求发送到127.0.0.1

可以访问主机

发送Ping请求到173.194.32.38

主机是无法访问

Sending Ping Request to 127.0.0.1
Host is reachable
Sending Ping Request to 173.194.32.38
Host is NOT reachable

推荐答案

您不能简单地使用Java进行ping操作，因为它依赖于ICMP，这是遗憾的是，Java不支持

You can not simply ping in Java as it relies on ICMP, which is sadly not supported in Java

http://mindprod.com/jgloss/ ping.html

使用套接字

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