java IO 操作字节数组 ByteArrayStream

import java.io.*;
public class Main {

public static void main(String[] args) throws IOException {

ByteArrayInputStream bis=new ByteArrayInputStream("神奇的我".getBytes());
ByteArrayOutputStream bos=new ByteArrayOutputStream();

int ch=0;
while((ch=bis.read())!=-1)
{
bos.write(ch);
}
System.out.println(bos.toString());

}

}