PushbackInputStream類markSupported()方法 (PushbackInputStream 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 stream supports mark(), reset() or not.

  markSupported()方法用于檢查此流是否支持mark()，reset()。

• 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(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。

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

  在檢查支持方法時(shí)， markSupported()方法不會(huì)引發(fā)異常。

Syntax:

句法：

public boolean markSupported();

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 boolean, it returns true when this stream support mark() method otherwise it returns false.

方法的返回類型為boolean ，當(dāng)此流支持mark()方法時(shí)返回true，否則返回false。

Example:

例：

// Java program to demonstrate the example // of boolean markSupported() method of // PushbackInputStreamimport java.io.*;public class MarkSupportedOfPBIS {public static void main(String[] args) throws Exception {byte[] b_arr = {97,98,99,100};InputStream is_stm = null;PushbackInputStream pb_stm = null;try {// Instantiates ByteArrayOutputStream and PushbackInputStreamis_stm = new ByteArrayInputStream(b_arr);pb_stm = new PushbackInputStream(is_stm);// By using markSupported() method is to// check whether this stream supports// mark() method or notboolean status = pb_stm.markSupported();System.out.println("pb_stm.markSupported(): " + status);} catch (Exception ex) {System.out.println(ex.toString());} finally {if (is_stm != null)is_stm.close();if (pb_stm != null)pb_stm.close();}} }

Output

輸出量

pb_stm.markSupported(): false

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

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