第七节课

第七节课第七节课
import java.io.*;

import javax.imageio.stream.FileImageInputStream;
@SuppressWarnings("unused")
public class StreamTest {
public static void main(String[] args) throws Exception {
/*int data;
while ((data=System.in.read())!=-1)
{
System.out.write(data);
}*///你输入什么 重复显示什么 哈哈
// TODO Auto-generated method stub



//过滤流buffer 偶一个缓冲区啊 先不写入硬盘
FileOutputStream fos=new FileOutputStream("1.txt");
BufferedOutputStream bos=new BufferedOutputStream(fos);
bos.write("baidu.com.cn".getBytes());

//bos.blush(); 可以继续啊

bos.close();


//下面是文件的 输入 输出流

/**
*
* FileOutputStream fos=new FileOutputStream("1.txt");
fos.write("baidu.com.cn".getBytes());
fos.close();


FileInputStream fis=new FileInputStream("1.txt");
byte[] buf=new byte[100];
int len=fis.read(buf);
System.out.println(new String(buf,0,len));//数组 位置 长度
fis.close();//关闭输入流*/


/*FileInputStream fis=new FileInputStream("1.txt");
BufferedInputStream bis=new BufferedInputStream(fis);
byte[] buf=new byte[100];
//int len=fis.read(buf);
int len=bis.read(buf);
System.out.println(new String(buf,0,len));//数组 位置 长度
//fis.close();
bis.close();*/

FileInputStream fis=new FileInputStream("1.txt");
BufferedOutputStream bos1=new BufferedOutputStream(fos);
DataOutputStream dos=new DataOutputStream(bos1);
byte b=3;
int i=78;
char ch='a';
float f=4.5f;
dos.writeByte(b);
dos.write(i);
dos.writeChar(ch);
dos.writeFloat(f);
dos.close();


}

}

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