Java Socket setSendBufferSize() 方法

2025 年 3 月 25 日 | 阅读 2 分钟

Java Socket 类的 setSendBufferSize() 方法将此套接字的 SO_SNDBUF 选项设置为给定值。大小值应大于 0。

语法

参数

参数 'size' 表示设置发送缓冲区的大小。

不适用

抛出

IllegalArgumentException - 如果大小为 0 或小于零。

SocketException - 如果底层协议（如 TCP 错误）存在错误。

示例 1

import java.io.IOException;
import java.net.*;
public class JavaSocketSetSendBufferSizeExample1  {
    public static void main(String[] args) throws IOException {
        //calling the constructor of the socket class
        Socket socket = new Socket();
        //setSendBufferSize() sets the send buffer size or SO_SNDBUF option with the specified value
        socket.setSendBufferSize(67);
        //getSendBufferSize() method returns the buffer size(SO_SNDBUF) used by the platform for output
        System.out.println("Send Buffer size: "+socket.getSendBufferSize());
    }
}

输出

Send Buffer size: 67

示例 2

import java.io.IOException;
import java.net.*;
public class JavaSocketSetSendBufferSizeExample2  {
    public static void main(String[] args) throws IOException {
        //calling the constructor of the socket class
        Socket socket = new Socket();
        //setSendBufferSize() sets the send buffer size or SO_SNDBUF option with the specified value
        //the buffer size should be greater than zero, else it will throw an exception.
        socket.setSendBufferSize(-67);
        //getSendBufferSize() method returns the buffer size(SO_SNDBUF) used by the platform for output
        System.out.println("Send Buffer size: "+socket.getSendBufferSize());
    }
}

输出

Exception in thread "main" java.lang.IllegalArgumentException: negative send size
	at java.net.Socket.setSendBufferSize(Socket.java:1193)
	at com.tpointtech.JavaSocketSetSendBufferSizeExample2.main(
	JavaSocketSetSendBufferSizeExample2.java:11)

示例 3

import java.io.IOException;
import java.net.*;
public class JavaSocketSetSendBufferSizeExample3  {
    public static void main(String[] args) throws IOException {
        //calling the constructor of the socket class
        Socket socket = new Socket();
        //closing the socket
        socket.close();
        //setSendBufferSize() sets the send buffer size or SO_SNDBUF option with the specified value
        //it will throw an exception, else the socket is already closed.
        socket.setSendBufferSize(67);
        //getSendBufferSize() method returns the buffer size(SO_SNDBUF) used by the platform for output
        System.out.println("Send Buffer size: "+socket.getSendBufferSize());
    }
}

输出

Exception in thread "main" java.net.SocketException: Socket is closed
	at java.net.Socket.setSendBufferSize(Socket.java:1196)
	at com.tpointtech.JavaSocketSetSendBufferSizeExample2.main(
	JavaSocketSetSendBufferSizeExample2.java:13)

下一主题Java Socket 类

Java Socket setSendBufferSize() 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 setSendBufferSize() 方法

语法

参数

返回

抛出

示例 1

示例 2

示例 3

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