测试类源码如下：
public class Test {
public static void main(String[] args) {
  // 创建字符输入流
  BufferedReader bufferedReader = null;
  // 创建自定义输入流对象
  MyReader myReader = null;
  try {
   // 封装bufferedReader
   bufferedReader = new BufferedReader(new InputStreamReader(
     new FileInputStream("Person.java")));
   // 实例化MyReader
   myReader = new MyReader(bufferedReader);
   // 读取数据，输出到控制台
   String src = null;
   while ((src = myReader.readLine()) != null) {
    System.out.println(src);
   }
  } catch (FileNotFoundException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
}
}
封装类源码如下：
package com.itheima;
import java.io.BufferedReader;
import java.io.IOException;
public class MyReader {
// 声明成员bufferedReader变量
private BufferedReader bufferedReader;
// 声明计数器
private int count = 1;
public MyReader(BufferedReader bufferedReader) {
  this.bufferedReader = bufferedReader;
}
// 封装readLine()方法
public String readLine() {
  StringBuilder builder = new StringBuilder();
  try {
   String reader = bufferedReader.readLine();
   if (reader == null) {
    return null;
   }
   builder.append(count++).append(": ").append(reader);
  } catch (IOException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
  return builder.toString();
}
}


由于本人技术有限，代码中可能存在不合理的地方，欢迎大家积极点评，

测试类源码如下：
public class Test {
public static void main(String[] args) {
  // 创建字符输入流
  BufferedReader bufferedReader = null;
  // 创建自定义输入流对象
  MyReader myReader = null;
  try {
   // 封装bufferedReader
   bufferedReader = new BufferedReader(new InputStreamReader(
     new FileInputStream("Person.java")));
   // 实例化MyReader
   myReader = new MyReader(bufferedReader);
   // 读取数据，输出到控制台
   String src = null;
   while ((src = myReader.readLine()) != null) {
    System.out.println(src);
   }
  } catch (FileNotFoundException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
}
}
封装类源码如下：
package com.itheima;
import java.io.BufferedReader;
import java.io.IOException;
public class MyReader {
// 声明成员bufferedReader变量
private BufferedReader bufferedReader;
// 声明计数器
private int count = 1;
public MyReader(BufferedReader bufferedReader) {
  this.bufferedReader = bufferedReader;
}
// 封装readLine()方法
public String readLine() {
  StringBuilder builder = new StringBuilder();
  try {
   String reader = bufferedReader.readLine();
   if (reader == null) {
    return null;
   }
   builder.append(count++).append(": ").append(reader);
  } catch (IOException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
  return builder.toString();
}
}


由于本人技术有限，代码中可能存在不合理的地方，欢迎大家积极点评，