testbufferedreader.java

来自「一个很好的Java函数实例」· Java 代码 · 共 40 行

package apibook.c3.s4;

import java.io.*;

//测试BufferedReader类
public class TestBufferedReader {
  public TestBufferedReader() {
  }
  public static void main(String[] args) {
    try {
      String filename = "TestBufferedReader.txt";
      //使用指定的文件创建BufferedReader
      BufferedReader in = new BufferedReader(new FileReader(filename));
      if (in.markSupported()) {
          int limit=10;
          //以长度10作为mark位置
          in.mark(limit);
          System.out.println("set mark 10");

          //第一次读取数据到mark之前
          for (int i = 0; i < limit; i++)
              System.out.print((char)(in.read()));
          //重新reset到文件开始处
          in.reset();
          System.out.println("\nafter reset");
      }

      in.skip(5);//跳过5个字节
      System.out.println("skip 5 bytes:");
      String str;
      while ((str = in.readLine()) != null) {
          System.out.println(str);//读取剩下部分
      }
      in.close();//关闭流
    } catch (IOException e) {
      e.printStackTrace();
    }
  }

}