我是照著老師的代碼敲的，可是有異常，而且double的值輸出的不對，應(yīng)該是10.5的，請問那位知道哪里錯了，求指教...

import?java.io.DataOutputStream;
import?java.io.FileOutputStream;
import?java.io.IOException;

public?class?DosDemo?{

	public?static?void?main(String[]?args)throws?IOException?{
		String?file="demo/dos.dat";
		DataOutputStream?dos=new?DataOutputStream(new?FileOutputStream(file));
		dos.writeInt(10);
		dos.writeInt(-10);
		dos.writeLong(10l);
		dos.writeDouble(10.5);
		dos.writeUTF("中國");//用utf-8編碼顯示
		dos.writeChars("中國");//utf-16be
		dos.close();
		IOUtil.printHex(file);
	}

}

import?java.io.DataInputStream;
import?java.io.FileInputStream;
import?java.io.IOException;



public?class?DisDemo?{

	public?static?void?main(String[]?args)?throws?IOException{
		
		String?file="demo/dos.dat";
		IOUtil.printHex(file);
		DataInputStream?dis=new?DataInputStream(new?FileInputStream(file));
		
		int?i=dis.readInt();
		System.out.println(i);
		i=dis.readInt();
		System.out.println(i);
		long?l=dis.readLong();
		System.out.println(l);
		double?d=dis.readDouble();
		System.out.println(d);
		String?s=dis.readUTF();
		System.out.println(s);
		
		dis.close();
	}

}

結(jié)果是這樣的：

00 00 00 0a ff ff ff f6 00 00?

00 00 00 00 00 0a 00 06 e4 b8?

ad e5 9b bd 4e 2d 56 fd 10

-10

10

9.58651235932276E-309

Exception in thread "main" java.io.EOFException

at java.io.DataInputStream.readFully(Unknown Source)

at java.io.DataInputStream.readUTF(Unknown Source)

at java.io.DataInputStream.readUTF(Unknown Source)

at javaIO.DisDemo.main(DisDemo.java:25)