相干RandomAccessFile类的一点说明

	public static void main(String[] args) throws Exception {		// TODO Auto-generated method stub		File saveFile = new File("a");//		RandomAccessFile accessFile = new RandomAccessFile(saveFile, "rwd");//		accessFile.close();		RandomAccessFile accessFile1 = new RandomAccessFile(saveFile, "rwd");		accessFile1.writeChars("4454545");		accessFile1.close();	}

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对于这句代码说明：

RandomAccessFile accessFile1 = new RandomAccessFile(saveFile, "rwd");

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不管怎样，都对saveFile这个文件进行随机读写的,如果不存在saveFile文件，就会自动创建一个空白文件的!