bufferedtest2.java

java应用开发详解

import java.io.*;



class BufferedTest2{
    public static void main(String[] args) {
        try {
            FileInputStream in = new FileInputStream("test.txt");

	    //在文件输入流之上封装缓冲流
            BufferedInputStream bufin = new BufferedInputStream(in);
            
            if (bufin.markSupported()) 
            {
                System.out.println("BufferedInputStream  support 'mark' method !!!");
                
                int limit=bufin.available();
                System.out.println("limit is "+limit);
                
                //当前位置添加一个标识
                bufin.mark(limit);
                
                for (int i = 0; i < limit; i++)
                    System.out.print((char)(bufin.read()));
                
                //用reset方法，使输入流回到起点
                bufin.reset();
            }
            
            System.out.println();
            System.out.println("second copy of test.txt");
            int c;
            while ((c=bufin.read()) >= 0)   
                System.out.print((char)c);
                
            bufin.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}