Java ByteArrayInputStream markSupported（）方法与示例

ByteArrayInputStream类markSupported()方法 (ByteArrayInputStream Class markSupported() method)

markSupported() method is available in java.util package.
markSupported()方法在java.util包中可用。
markSupported() method is used to check whether this ByteArrayInputStream support mark() and reset() methods or not.
markSupported()方法用于检查此ByteArrayInputStream是否支持mark()和reset()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。
markSupported() method does not throw an exception at the time of checking supportive methods.
在检查支持方法时， markSupported()方法不会引发异常。

Syntax:

句法：

    public boolean markSupported();

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

该方法的返回类型为boolean ，当此流支持mark()和reset()方法时返回true，否则返回false。

Example:

例：

// Java program to demonstrate the example 
// of boolean markSupported() method of
// ByteArrayInputStream
import java.io.*;
public class MarkSupportedBAIS {
public static void main(String[] args) throws Exception {
byte[] by = {
97,
98,
98,
99
};
// Instantiates ByteArrayInputStream 
ByteArrayInputStream byte_s = new ByteArrayInputStream(by);
// By using markSupported() method check 
// whether this stream byte_s support
// mark() and reset() or not
boolean status = byte_s.markSupported();
System.out.println("byte_s.markSupported(): " + status);
byte_s.close();
}
}

Output

输出量