System.in包裝成BufferedReader

package io;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

/**
 * 將 System.in包裝成BufferedReader
 * System.in是一個InputStream,所以需要先用InputStreamReader將InputStream包裝成Reader
 * 然後再用BufferedReader包裝
 */
public class TestReadWriteTxtFile
{
  public static void main(String[] args) throws IOException
  {
    BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
    String s;
    System.out.println("按回車結束程序!");
    while( (s=in.readLine()) !=null && s.length() !=0)
    {
      System.out.println(s);
    }
  }
}