Java Dataoutputstream包装流

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package com.ejvqa.test02;

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

import com.ejvqa.day01.dayGet;

public class DataStreamTest {
   public static void main(String[] args) throws IOException {
       FileOutputStream out=null;
       DataOutputStream da=null;
       try {
           System.out.println("输入账目");
           out=new FileOutputStream(new File("a.dat"));
           da=new DataOutputStream(out);
           for (int i = 0; i < 5; i++) {
               double temp=(Math.random());
               da.writeDouble(temp);
               System.out.println(temp);

           }
           da.flush();
       } catch (Exception e) {
           // TODO: handle exception
           e.printStackTrace();
       }finally{
           out.close();
           da.close();
       }
       System.out.println("输出账目");
       FileInputStream inStream=new FileInputStream(new File("a.dat"));
       DataInputStream in=new DataInputStream(inStream);
       for (int i = 0; i <5; i++) {
           double f=in.readDouble();
           System.out.println(f);
       }
       in.close();
       inStream.close();
   }


}

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