stringreader

StringReader類markSupported()方法 (StringReader 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 StringReader stream support mark() method or not.

  markSupported()方法用于檢查此StringReader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 supports mark() method otherwise it returns false.

該方法的返回類型為boolean ，當此流支持mark()方法時返回true，否則返回false。

Example:

例：

// Java program to demonstrate the example 
// of boolean markSupported() method of StringReader
import java.io.*;
public class MarkSupportedOfSR {
public static void main(String[] args) throws Exception {
StringReader str_r = null;
try {
// Instantiates StringReader
str_r = new StringReader("JavaWorld!");
// By using markSupported() method is to check 
// whether this stream str_r supports mark()
// method or not
boolean status = str_r.markSupported();
System.out.println("str_r.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 stream
if (str_r != null) {
str_r.close();
}
}
}
}

Output

輸出量

str_r.markSupported(): true

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

stringreader