Java FilterInputStream markSupported()方法
java.io.FilterInputStream.markSupported() 用于测试输入流是否支持mark()和reset()方法。
1 语法
public boolean markSupported()
2 参数
无
3 返回值
如果流类型支持mark()和reset()方法,则该方法返回true。
4 示例
package com.yiidian;
/**
* 一点教程网: http://www.yiidian.com
*/
/**
* java.io.FilterInputStream.markSupported()方法的例子
*/
import java.io.BufferedInputStream;
import java.io.FileInputStream;
import java.io.FilterInputStream;
import java.io.IOException;
import java.io.InputStream;
public class Demo {
public static void main(String[] args) throws Exception {
InputStream is = null;
FilterInputStream fis = null;
boolean bool = false;
try {
// create input streams
is = new FileInputStream("d://test.txt");
fis = new BufferedInputStream(is);
// tests if the input stream supports mark() and reset()
bool = fis.markSupported();
// prints
System.out.print("Supports mark and reset methods: "+bool);
} catch(IOException e) {
// if any I/O error occurs
e.printStackTrace();
} finally {
// releases any system resources associated with the stream
if(is!=null)
is.close();
if(fis!=null)
fis.close();
}
}
}
假设test.txt内容如下:
ABCDEF
输出结果为:
Supports mark and reset methods: true
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