数据流读取原生类型数据

package random;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;

public class DataStreamImpl {

public static void main(String[] args) {

ByteArrayOutputStream baos = new ByteArrayOutputStream();
DataOutputStream dos = new DataOutputStream(baos);
try {
dos.writeDouble(Math.random());
} catch (IOException e) {
e.printStackTrace();
}
ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray());
DataInputStream dis = new DataInputStream(bais);
try {
double dou = dis.readDouble();
System.out.println(dou);
} catch (IOException e) {
e.printStackTrace();
}
}
}