Java Socket setReceiveBufferSize() 方法

2025 年 3 月 25 日 | 阅读 2 分钟

Java Socket 类的 setReceiveBufferSize() 方法将指定的套接字 SO_RCVBUF 选项设置为给定值。缓冲区大小应大于零，否则将抛出 IllegalArgumentException。

语法

参数

参数 'size' 表示要设置接收缓冲区大小的大小。

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 JavaSocketSetReceiveBufferSizeExample1  {
    public static void main(String[] args) throws IOException {
        //calling the constructor of the socket class
        Socket socket = new Socket();
        //setting the buffer size with the help of setReceiveBufferSize() method
        socket.setReceiveBufferSize(789);
        //getReceiveBufferSize() method returns the buffer size set for this socket
        System.out.println("Buffer size: "+socket.getReceiveBufferSize());
    }
}

输出

Buffer size: 789

示例 2

import java.io.IOException;
import java.net.*;
public class JavaSocketSetReceiveBufferSizeExample2  {
    public static void main(String[] args) throws IOException {
        //calling the constructor of the socket class
        Socket socket = new Socket();
        //setting the buffer size with the help of setReceiveBufferSize() method
        //the buffer size should be greater than 0, else it will throw an exception
        socket.setReceiveBufferSize(0);
        //getReceiveBufferSize() method returns the buffer size for this socket
        System.out.println("Buffer size: "+socket.getReceiveBufferSize());
    }
}

输出

Exception in thread "main" java.lang.IllegalArgumentException: invalid receive size
	at java.net.Socket.setReceiveBufferSize(Socket.java:1267)
	at com.tpointtech.JavaSocketSetReceiveBufferSizeExample2.main(
	JavaSocketSetReceiveBufferSizeExample2.java:11)

示例 3

import java.io.IOException;
import java.net.*;
public class JavaSocketSetReceiveBufferSizeExample3  {
    public static void main(String[] args) throws IOException {
        //calling the constructor of the socket class
        Socket socket = new Socket();
        //closing the socket
        socket.close();
        //setting the buffer size with the help of setReceiveBufferSize() method
        //it will throw an exception, as the socket is already closed
        socket.setReceiveBufferSize(10);
        //getReceiveBufferSize() method returns the buffer size for this socket
        System.out.println("Buffer size: "+socket.getReceiveBufferSize());
    }
}

输出

Exception in thread "main" java.net.SocketException: Socket is closed
	at java.net.Socket.setReceiveBufferSize(Socket.java:1270)
	at com.tpointtech.JavaSocketSetReceiveBufferSizeExample3.main(
	JavaSocketSetReceiveBufferSizeExample3.java:12)

下一主题Java Socket 类

Java Socket setReceiveBufferSize() 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 setReceiveBufferSize() 方法

语法

参数

返回

抛出

示例 1

示例 2

示例 3

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