testfileoutputstream.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.s5;

import java.io.*;

//测试FileOutputStream类
public class TestFileOutputStream {
  public TestFileOutputStream() {
  }
  public static void main(String[] args) {
    try {
      String outfile = "TestFileOutputStream.txt";
      FileOutputStream out = new FileOutputStream(outfile);

      String content = "this is a test from TestFileOutputStream";
      byte[] buf = content.getBytes();
      int count;
      out.write('A');//输入字符
      out.write('\n');
      out.write(buf);//输入数组
      out.write(buf, 5, (content.length()-5)/2);//输入数组部分数据
      out.flush();//刷新

      //测试GetFD
      FileOutputStream out2 = new FileOutputStream(out.getFD());
      byte[] buf2 = "write by out2".getBytes();
      out2.write(buf2);
      out2.close();//关闭输出文件
      out.close();//关闭输出文件
    } catch (IOException e) {
      e.printStackTrace();
    }
  }

}