自己写了一个小程序，出了些错误求指导

[人丑嘴不甜长的磕碜还没钱]

package cn.bj.reboot;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.RandomAccessFile;

public class reboot {
	static String filename = "D:\\reboot.bat";
	public static void main(String[] args) {
		 create();
		 going();
	}
	public static void create(){
		
		File file = new File(filename);
		RandomAccessFile raf = null;
		
		try {
			raf = new RandomAccessFile(filename,"rw");
			String closed = "shutdown -s -t 30";
			raf.writeBytes(closed);
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
	}
	public static void going(){
		Runtime rt = Runtime.getRuntime();
		try {
			rt.exec(filename);
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
}

运行时报错java.io.IOException: Cannot run program "D:\reboot.bat": CreateProcess error=32, ?í??????ò????????????????
at java.lang.ProcessBuilder.start(ProcessBuilder.java:459)
at java.lang.Runtime.exec(Runtime.java:593)
at java.lang.Runtime.exec(Runtime.java:431)
at java.lang.Runtime.exec(Runtime.java:328)
at cn.bj.reboot.reboot.going(reboot.java:35)
at cn.bj.reboot.reboot.main(reboot.java:12)
Caused by: java.io.IOException: CreateProcess error=32, ?í??????ò????????????????
at java.lang.ProcessImpl.create(Native Method)
at java.lang.ProcessImpl.<init>(ProcessImpl.java:81)
at java.lang.ProcessImpl.start(ProcessImpl.java:30)
at java.lang.ProcessBuilder.start(ProcessBuilder.java:452)
... 5 more
这个代码相信都看的懂 我在D盘创建的reboot.bat成功了 然后只走going()方法也成功运行了reboot.bat
但是一起运行的时候就报出这个错误，请教达人告诉我原因

[sdojqy1122]

别写入字节吧？

[sdojqy1122]

用字符流写入试试。

[古布]

rt.exec(filename);
==>
rt.exec("cmd /c " + filename );

[人丑嘴不甜长的磕碜还没钱]

错误原因找到了 忘记加raf.close()了 谢谢大家的热心解答

[人丑嘴不甜长的磕碜还没钱]

错误原因找到了，忘记加raf.close()了 谢谢大家的热心帮助