FilterInputStream類的reset()方法 (FilterInputStream 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 this FilterInputStream to the position set by the most recent call of mark() method.

  reset()方法用于將此FilterInputStream重置到由mark()方法的最新調(diào)用設(shè)置的位置。

• 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()方法是一種非靜態(tài)方法，只能通過類對(duì)象訪問，如果嘗試使用類名稱訪問該方法，則會(huì)收到錯(cuò)誤消息。

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

  reset()方法在重置流時(shí)可能會(huì)引發(fā)異常。

  IOException: This exception may throw when the given parameter is invalid.

  IOException ：如果給定參數(shù)無效，則可能引發(fā)此異常。

Syntax:

句法：

public void reset();

Parameter(s):

參數(shù)：

• It does not accept any parameter.

  它不接受任何參數(shù)。

Return value:

返回值：

The return type of the method is void, it returns nothing.

該方法的返回類型為void ，不返回任何內(nèi)容。

Example:

例：

// Java program to demonstrate the example // of void reset() method of FilterInputStreamimport java.io.*;public class ResetOfFIS {public static void main(String[] args) throws Exception {FileInputStream fis_stm = null;FilterInputStream fil_stm = null;try {// Instantiates FileInputStream and // FilterInputStreamfis_stm = new FileInputStream("D:\\includehelp.txt");fil_stm = new BufferedInputStream(fis_stm);// By using read() method isto // read the character from car_stmchar ch1 = (char) fil_stm.read();char ch2 = (char) fil_stm.read();char ch3 = (char) fil_stm.read();System.out.println("ch1: " + ch1);System.out.println("ch2: " + ch2);System.out.println("ch3: " + ch3);// By using mark() method isto// set the current position in this// fil_stmSystem.out.println("fil_stm.mark(0): ");fil_stm.mark(0);char ch4 = (char) fil_stm.read();char ch5 = (char) fil_stm.read();System.out.println("ch4: " + ch4);System.out.println("ch5: " + ch5);// By using reset() method isto// reset the stream to the position // set by the call mark() methodSystem.out.println("fil_stm.reset(): ");fil_stm.reset();char ch6 = (char) fil_stm.read();char ch7 = (char) fil_stm.read();char ch8 = (char) fil_stm.read();char ch9 = (char) fil_stm.read();System.out.println("ch4: " + ch6);System.out.println("ch5: " + ch7);System.out.println("ch6: " + ch8);System.out.println("ch7: " + ch9);} catch (Exception ex) {System.out.println(ex.toString());} finally {// with the help of this block is to// free all necessary resources linked// with the streamif (fis_stm != null) {fis_stm.close();if (fil_stm != null) {fil_stm.close();}}}} }

Output

輸出量

ch1: J ch2: a ch3: v fil_stm.mark(0): ch4: a ch5: W fil_stm.reset(): ch4: a ch5: W ch6: o ch7: r

翻譯自: https://www.includehelp.com/java/filterinputstream-reset-method-with-example.aspx

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