FileInputStream类的getChannel()方法 (FileInputStream Class getChannel() method)

• getChannel() method is available in java.io package.

  getChannel()方法在java.io包中可用。

• getChannel() method is used to return the distinct FileChannel object linked with this FileInputStream.

  getChannel()方法用于返回与此FileInputStream链接的独特FileChannel对象。

• getChannel() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.

  getChannel()方法是一个非静态方法，只能通过类对象访问，如果尝试使用类名称访问该方法，则会收到错误消息。

• getChannel() method does not throw an exception at the time of getting channel.

  getChannel()方法在获取频道时不会引发异常。

Syntax:

句法：

public FileChannel getChannel();

Parameter(s):

参数：

• It does not accept any parameter.

  它不接受任何参数。

Return value:

返回值：

The return type of the method is FileChannel, it returns the FileChannel connected with this stream.

方法的返回类型为FileChannel ，它返回与此流连接的FileChannel。

Example:

例：

// Java program to demonstrate the example // of FileChannel getChannel() method // of FileInputStreamimport java.io.*;import java.nio.channels.*;public class GetChannelOfFIS {
    public static void main(String[] args) throws Exception {
     FileInputStream fis_stm = null;  FileChannel file_ch = null;  int count = 0;  try {
      // Instantiates FileInputStream   fis_stm = new FileInputStream("C:\\includehelp.txt");   while ((count = fis_stm.read()) != -1) {
       // By using read() method is to read    // a byte from fis_stm    count = fis_stm.read();    // Display corresponding bytes value    byte b = (byte) count;    // Display value of b    System.out.println("fis_stm.read(): " + b);   }   // By using getChannel() method is to return   // FileChannel linked with the stream	   file_ch = fis_stm.getChannel();   System.out.println("fis_stm.getChannel(): " + file_ch);  } catch (Exception ex) {
      System.out.println(ex.toString());  } finally {
      // with the help of this block is to   // free all necessary resources linked   // with the stream   if (fis_stm != null) {
       fis_stm.close();    if (file_ch != null) {
        file_ch.close();    }   }  } }}

Output

输出量

fis_stm.read(): 4fis_stm.read(): 97fis_stm.read(): 97fis_stm.read(): 8fis_stm.read(): 111fis_stm.read(): 108fis_stm.read(): 33fis_stm.read(): 33fis_stm.getChannel():

翻译自: