例子
以下示例显示java.io.Bufferedreader.marksupported()方法的用法。
package com.jc2182;
import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.InputStream;
import java.io.InputStreamReader;
public class BufferedReaderDemo {
public static void main(String[] args) throws Exception {
InputStream is = null;
InputStreamReader isr = null;
BufferedReader br = null;
try {
// open input stream test.txt for reading purpose.
is = new FileInputStream("c:/test.txt");
// create new input stream reader
isr = new InputStreamReader(is);
// create new buffered reader
br = new BufferedReader(isr);
boolean bool = false;
// returns true if the stream type supports mark
bool = br.markSupported();
System.out.println("Buffered reader supports mark : "+bool);
} catch(Exception e) {
e.printStackTrace();
} finally {
// releases resources associated with the streams
if(is!=null)
is.close();
if(isr!=null)
isr.close();
if(br!=null)
br.close();
}
}
}
假设我们有一个文本文件c:/test.txt ,其内容如下。该文件将用作示例程序的输入-
让我们编译并运行以上程序,这将产生以下结果-
Buffered reader supports mark : true