Java Socket getReceiveBufferSize() 方法

2025 年 3 月 25 日 | 阅读 2 分钟

Java Socket 类的 getReceiveBufferSize() 方法返回此套接字的缓冲区大小 (SO_RCVBUF 选项)。

语法

参数

不适用

返回值

getReceiveBufferSize() 方法返回此套接字的缓冲区大小或 SO_RCVBUF 选项。

抛出

SocketException - 如果底层协议出现错误，例如 TCP 错误。

示例 1

import java.io.IOException;
import java.net.*;
public class JavaSocketGetReceiveBufferSizeExample1  {
    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 JavaSocketGetReceiveBufferSizeExample2  {
    public static void main(String[] args) throws IOException {
        //calling the constructor of the socket class
        Socket socket = new Socket();
        //getReceiveBufferSize() method returns the buffer size set for this socket
        // by default the buffer size of this socket is set to 65536
        System.out.println("Buffer size: "+socket.getReceiveBufferSize());
    }
}

输出

Buffer size: 65536

示例 3

import java.io.IOException;
import java.net.*;
public class JavaSocketGetReceiveBufferSizeExample3  {
    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.JavaSocketGetReceiveBufferSizeExample3.main(JavaSocketGetReceiveBufferSizeExample3.java:11)

示例 4

import java.io.IOException;
import java.net.*;
public class JavaSocketGetReceiveBufferSizeExample4  {
    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
        socket.setReceiveBufferSize(10);
        //it will throw an error as the socket is already closed
        //getReceiveBufferSize() method returns the buffer size set 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.JavaSocketGetReceiveBufferSizeExample4.main(JavaSocketGetReceiveBufferSizeExample4.java:12)

下一主题Java Socket 类

Java Socket getReceiveBufferSize() 方法

语法

参数

返回值

抛出

示例 1

示例 2

示例 3

示例 4

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Java Socket getReceiveBufferSize() 方法

语法

参数

返回值

抛出

示例 1

示例 2

示例 3

示例 4

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