filterreader

FilterReader類markSupported()方法 (FilterReader Class markSupported() method)

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

  markSupported()方法在java.io包中可用。

• markSupported() method is used to check whether this FilterReader stream support mark() method or not.

  markSupported()方法用于檢查此FilterReader流是否支持mark()方法。

• markSupported() 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.

  markSupported()方法是一種非靜態方法，只能通過類對象訪問，如果嘗試使用類名稱訪問該方法，則會收到錯誤消息。

• markSupported() method does not throw an exception at the time of checking supporting methods.

  在檢查支持方法時， markSupported()方法不會引發異常。

Syntax:

句法：

public boolean markSupported();

Parameter(s):

參數：

• It does not accept any parameter.

  它不接受任何參數。

Return value:

返回值：

The return type of the method is boolean, it returns true when this stream support mark() method otherwise it returns false.

該方法的返回類型是布爾值 ，當此流支持標記()方法，否則返回false返回true。

Example:

例：

// Java program to demonstrate the example // of boolean markSupported() method of FilterReaderimport java.io.*;public class MarkSupportedOfFR {public static void main(String[] args) throws Exception {Reader r_stm = null;FilterReader fr_stm = null;try {// Instantiates StringReader and // FilterReaderr_stm = new StringReader("JavaWorld!!!!");fr_stm = new FilterReader(r_stm) {};// By using markSupported() method is to// check whether the stream fr_stm support// mark() or notboolean status = fr_stm.markSupported();System.out.println("fr_stm.markSupported(): " + status);} 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 (fr_stm != null) {fr_stm.close();}}} }

Output

輸出量

fr_stm.markSupported(): true

翻譯自: https://www.includehelp.com/java/filterreader-marksupported-method-with-example.aspx

filterreader

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