Java Socket getInetAddress() 方法

2025 年 3 月 25 日 | 阅读 2 分钟

Java Socket 类的 getInetAddress() 方法返回套接字连接到的地址。如果套接字正在关闭，则在套接字关闭后，此方法将返回已连接的地址。

语法

参数

不适用

getInetAddress() 方法要么返回套接字连接到的远程 IP 地址，要么在套接字未连接时返回 null。

示例 1

import java.io.IOException;
import java.net.*;
public class JavaSocketGetInetAddressExample1 {
    public static void main(String[] args) throws IOException {
      Socket socket = new Socket();
      InetAddress inetAddress=InetAddress.getByName(null);
      //the port should be greater or equal to 0, else it will throw an error
        int port=1085;
        //calling the constructor of the SocketAddress class
        SocketAddress socketAddress=new InetSocketAddress(inetAddress, port);
        //binding the  socket with the inetAddress and port number
        socket.bind(socketAddress);
        int timeout=10000;
        //connect() method connects this socket to the server with the given timeout value.
        socket.connect(socketAddress,timeout);
        //getInetAddress() method returns the Inet Address of this socket.
        System.out.println("Inet address: "+socket.getInetAddress());
        //getLocalPort() method returns the port number of the socket
        System.out.println("Port number: "+socket.getLocalPort());
    }
}

输出

Inet address: localhost/127.0.0.1
Port number: 1085

示例 2

import java.io.IOException;
import java.net.*;
public class JavaSocketGetInetAddressExample2  {
    public static void main(String[] args) throws IOException {
      Socket socket = new Socket();
      InetAddress inetAddress=InetAddress.getByName(null);
      //the port should be greater or equal to 0, else it will throw an error
        int port=1085;
        //calling the constructor of the SocketAddress class
        SocketAddress socketAddress=new InetSocketAddress(inetAddress, port);
        //binding the  socket with the inetAddress and port number
        socket.bind(socketAddress);
        int timeout=10000;
        //closing the socket
        socket.close();
        //connect() method connects this socket to the server with the given timeout value.
        socket.connect(socketAddress,timeout);
        //getInetAddress() method returns the Inet Address of this socket.
        System.out.println("Inet address: "+socket.getInetAddress());
        //getLocalPort() method returns the port number of the socket
        System.out.println("Port number: "+socket.getLocalPort());
    }
}

输出

Exception in thread "main" java.net.SocketException: Socket is closed
	at java.net.Socket.connect(Socket.java:566)
	at com.tpointtech.JavaSocketGetInetAddressExample2.main(JavaSocketGetInetAddressExample2.java:20)

下一主题Java Socket 类

Java Socket getInetAddress() 方法

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示例 2

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Java Socket getInetAddress() 方法

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示例 1

示例 2

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