testreader.java

本书是一本为Java学习者在基础内容学习结束后进行课程设计时提供参考的指导书

package apibook.c3.s1;

import java.io.*;

//测试Reader类
public class TestReader {
  public TestReader(Reader in) {
    try {
      if (in.ready())//检查流是否准备好
        System.out.println("Reader is ready!");
      else
        System.out.println("Reader isn't ready!");
      System.out.println("execute read():" + (char)in.read());//读取第一个字符
      if (in.markSupported())//查询是否支持mark和reset方法
      {
        in.mark(5);
        System.out.println("this input stream support mark");
      }
      else
        System.out.println("this input stream doesn't support mark");

      char[] inbuf = new char[10];
      int readsize = in.read(inbuf, 0, 10);//读取一个字节数组
      System.out.println("read number:" + readsize);
      System.out.println("read content:" + new String(inbuf));
      in.skip(5);//跳过5个字节数据
      readsize = in.read(inbuf, 0, 10);//读取数据
      System.out.println("after skip 5, read number:" + readsize);
      System.out.println("after skip 5, read content:" + new String(inbuf));

      in.close();//关闭
    } catch (IOException e) {
      e.printStackTrace();
    }
  }
  public static void main(String[] args) {
    try {
      TestReader testReader1 = new TestReader(new FileReader("TestReader.txt"));
    } catch (IOException e) {
        e.printStackTrace();
    }
  }

}