Java Socket setReuseAddress() 方法

2025 年 3 月 25 日 | 阅读 2 分钟

Java Socket 类的 setReuseAddress() 方法用于启用或禁用 SO_REUSEADDR 套接字选项。SO_REUSEADDR 的初始设置是禁用的。

语法

参数

参数 'on' 指示是启用还是禁用 SO_REUSEADDR 选项。

不适用

抛出

SocketException - 如果套接字已关闭，或者在启用或禁用 SO_REUSEADDR 套接字选项时发生错误。

示例 1

import java.io.IOException;
import java.net.*;
public class JavaSocketSetReuseAddressExample1  {
    public static void main(String[] args) throws IOException {
        //calling the constructor of the socket class
        Socket socket = new Socket();
        //enabling the SO_REUSEADDR option
        Boolean on=true;
        //setReuseAddress() method enables or disables the SO_REUSEADDR option
        socket.setReuseAddress(on);
        //getReuseAddress() method returns boolean value 'true' if SO_REUSEADDR option is enabled else it return false
        System.out.println("SO_REUSEADDR option is enabled: "+socket.getReuseAddress());
    }
}

输出

SO_REUSEADDR option is enabled: true

示例 2

import java.io.IOException;
import java.net.*;
public class JavaSocketSetReuseAddressExample2  {
    public static void main(String[] args) throws IOException {
        //calling the constructor of the socket class
        Socket socket = new Socket();
        //enabling the SO_REUSEADDR option
        Boolean on=false;
        //setReuseAddress() method enables or disables the SO_REUSEADDR option
        socket.setReuseAddress(on);
        //getReuseAddress() method returns boolean value 'true' if SO_REUSEADDR option is enabled else it return false
        if(socket.getReuseAddress()){
            System.out.println("SO_REUSEADDR option is enabled");
        }
        else{
            System.out.println("SO_REUSEADDR option is disabled");
        }
    }
}

输出

SO_REUSEADDR option is disabled

示例 3

import java.io.IOException;
import java.net.*;
public class JavaSocketSetReuseAddressExample3  {
    public static void main(String[] args) throws IOException {
        //calling the constructor of the socket class
        Socket socket = new Socket();
        //closing the socket
        socket.close();
        //enabling the SO_REUSEADDR option
        Boolean on=false;
        //setReuseAddress() method enables or disables the SO_REUSEADDR option
        //it will throw an exception, as the socket is already closed
        socket.setReuseAddress(on);
        //getReuseAddress() method returns boolean value 'true' if SO_REUSEADDR option is enabled else it return false
        if(socket.getReuseAddress()){
            System.out.println("SO_REUSEADDR option is enabled");
        }
        else{
            System.out.println("SO_REUSEADDR option is disabled");
        }
    }
}

输出

Exception in thread "main" java.net.SocketException: Socket is closed
	at java.net.Socket.setReuseAddress(Socket.java:1448)
	at com.tpointtech.JavaSocketSetReuseAddressExample3.main(JavaSocketSetReuseAddressExample3.java:15)

下一主题Java Socket 类

Java Socket setReuseAddress() 方法

语法

参数

返回

抛出

示例 1

示例 2

示例 3

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Java Socket setReuseAddress() 方法

语法

参数

返回

抛出

示例 1

示例 2

示例 3

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