MyBufferedReader

 

package cn.lxl.io;

import java.io.FileReader;
import java.io.IOException;

/**
 * Created by IntelliJ IDEA.
 * User: Administrator
 * Date: 2011-11-14
 * Time: 10:47:55
 * To change this template use File | Settings | File Templates.
 */
public class MyBufferedReader {
    private FileReader fileReader;

    public MyBufferedReader(FileReader fileReader) {
        this.fileReader = fileReader;
    }

    public String myReaderLine() throws IOException {

        StringBuilder sb = new StringBuilder();
        int ch = 0;
        while ((ch = fileReader.read()) != -1) {
            if (ch == '\r')
                continue;
            if (ch == '\n') {
                return sb.toString();
            } else {
                sb.append((char) ch);
            }
        }
        if (sb.length() != 0) {
            return sb.toString();
        }
        return null;
    }

    public void myReaderClose() throws IOException {
        fileReader.close();
    }

}

 

package cn.lxl.io;

import java.io.FileReader;

/**
 * Created by IntelliJ IDEA.
 * User: Administrator
 * Date: 2011-11-14
 * Time: 10:57:36
 * To change this template use File | Settings | File Templates.
 */
public class MyBufferReaderTest1{
    public static void main(String[] args) throws Exception{
        FileReader fr=new FileReader("bw.txt");
        MyBufferedReader mbr=new MyBufferedReader(fr);
        String line=null;
        while((line=mbr.myReaderLine())!=null){
            System.out.println(line);
        }
    }
}