BufferedReader类的reset()方法 (BufferedReader Class reset() method)

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

  reset()方法在java.io包中可用。

• reset() method is used to reset the stream to the most recent mark of this stream.

  reset()方法用于将流重置为该流的最新标记。

• reset() 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.

  reset()方法是一种非静态方法，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。

• reset() method may throw an exception at the time of resetting this stream.

  reset()方法在重置此流时可能会引发异常。

  IOException: This exception may throw while performing input/output operation.

  IOException ：在执行输入/输出操作时，可能会抛出此异常。

Syntax:

句法：

    public void reset();

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 void, it returns nothing.

该方法的返回类型为void ，不返回任何内容。

Example:

例：

// Java program to demonstrate the example
// of void reset() method of
// BufferedReader
import java.io.*;
public class ResetBR {public static void main(String[] args) throws Exception {// To open text file by using
// FileInputStream
FileInputStream fis = new FileInputStream("e:/includehelp.txt");
// Instantiates InputStreamReader
InputStreamReader inp_r = new InputStreamReader(fis);
// Instantiates BufferedReader
BufferedReader buff_r = new BufferedReader(inp_r);
// Read character from the stream
char ch1 = (char) buff_r.read();
char ch2 = (char) buff_r.read();
char ch3 = (char) buff_r.read();
System.out.println("ch1: " + ch1);
System.out.println("ch2 : " + ch2);
// By using mark() method isto
// set the limit the number of byte
// to be read
System.out.println("buff_r.mark(5): ");
buff_r.mark(5);
System.out.println("ch3: " + ch3);
// It reset the stream to the
// position last marked by mark
System.out.println("buff_r.reset(): ");
buff_r.reset();
// Read from the stream
char ch4 = (char) buff_r.read();
char ch5 = (char) buff_r.read();
// Display character
System.out.println("ch4: " + ch4);
System.out.println("ch5: " + ch5);
fis.close();
inp_r.close();
buff_r.close();
}
}

Output

输出量

ch1: H
ch2 : e
buff_r.mark(5):
ch3: l
buff_r.reset():
ch4: l
ch5: o

翻译自: https://www.includehelp.com/java/bufferedreader-reset-method-with-example.aspx