IO流有关问题

IO流问题
各位帮小弟看看我这小测试程序的错误之处！
import java.io.*;

public class TestDateStream {
public static void main(String[] args) {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
DateOutputStream dos = new DateOutputStream(baos);
DataOutputStream dos = new DataOutputStream(baos);
try {
baos.writeDouble(Math.random());
baos.writeBoolean(true);

ByteArrayInputStream bais = new ByteArrayInoutStream(baos.toByteArray());
System.out.println(bais.available());

DateInputStream dis = new DateInputStream(bais);

System.out.println(dis.readDouble());
System.out.println(dis.readBoolean());

dos.close();
dis.close();


} catch(IOException e) {
e.printStackTrace();
}
}
}

[解决办法]
DateOutputStream dos = new DateOutputStream(baos);
DataOutputStream dos = new DataOutputStream(baos);

为啥弄两遍？着肯定错啊。
[解决办法]
LZ全是拼写错误啊，注释部分是你的。

Java code

import java.io.*;public class TestDateStream {    public static void main(String[] args) {        ByteArrayOutputStream baos = new ByteArrayOutputStream();        //DateOutputStream dos = new DateOutputStream(baos);        DataOutputStream dos = new DataOutputStream(baos);        try {        //    baos.writeDouble(Math.random());        //    baos.writeBoolean(true);            dos.writeDouble(Math.random());            dos.writeBoolean(true);            //ByteArrayInputStream bais = new ByteArrayInoutStream(            ByteArrayInputStream bais = new ByteArrayInputStream(                    baos.toByteArray());            System.out.println(bais.available());            //DateInputStream dis = new DateInputStream(bais);            DataInputStream dis = new DataInputStream(bais);            System.out.println(dis.readDouble());            System.out.println(dis.readBoolean());            dos.close();            dis.close();        } catch (IOException e) {            e.printStackTrace();        }    }}