Java Socket toString() 方法

2025 年 3 月 25 日 | 阅读 2 分钟

Java Socket 类的 toString() 方法将此 Socket 转换为字符串。

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不适用

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Object 类中的 toString() 方法

toString() 方法返回给定 Socket 的字符串表示形式。

示例 1

import java.io.IOException;
import java.net.*;
public class JavaSocketToStringExample1  {
    public static void main(String[] args) throws IOException {
        Socket socket = new Socket();
        InetAddress inetAddress=InetAddress.getByName("localhost");
        //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);
        //connect() method connects the specified socket to the server
        socket.connect(socketAddress);
        System.out.println("Inet address: "+socket.getInetAddress());
        System.out.println("Port number: "+socket.getLocalPort());
        //The toString() method returns the string representation for the given socket. 
        socket.toString();
        //it will return the connecting port and binding address
        System.out.println(socket);
    }
 }

输出

Inet address: localhost/127.0.0.1
Port number: 1085
Socket[addr=localhost/127.0.0.1,port=1085,localport=1085]

示例 2

import java.io.IOException;
import java.net.*;
public class JavaSocketToStringExample2  {
    public static void main(String[] args) throws IOException {
        Socket socket = new Socket();
        InetAddress inetAddress=InetAddress.getByName("localhost");
        //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);
        //connect() method connects the specified socket to the server
        socket.connect(socketAddress);
        System.out.println("Inet address: "+socket.getInetAddress());
        System.out.println("Port number: "+socket.getLocalPort());
        //closing the socket will have no effect it will continue to return the same binding state
        socket.close();
        //The toString() method returns the string representation for the given socket.
        socket.toString();
        //it will return the connecting port and binding address
        System.out.println(socket);
    }
 }

输出

Inet address: localhost/127.0.0.1
Port number: 1085
Socket[addr=localhost/127.0.0.1,port=1085,localport=1085]

示例 3

import java.io.IOException;
import java.net.*;
public class JavaSocketToStringExample3  {
    public static void main(String[] args) throws IOException {
        //calling the constructor of the socket class
        Socket socket = new Socket();
        //The toString() method converts this socket to a String.
        //It would return an error, as the socket is not connected. 
        socket.toString();
        System.out.println(socket);
    }
 }

输出

Exception in thread "main" java.net.SocketException: Socket is not connected
	at java.net.Socket.shutdownOutput(Socket.java:1553)
	at com.tpointtech.JavaSocketToStringExample3.main(JavaSocketToStringExample3.java:11)

下一主题Java Socket 类

Java Socket toString() 方法

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Java Socket toString() 方法

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