请问为什么系统提示path有问题？有大神能帮忙解决一下吗

package irainbow.zxing;

import java.io.File;

import java.util.HashMap;

import com.google.zxing.BarcodeFormat;

import com.google.zxing.EncodeHintType;

import com.google.zxing.MultiFormatWriter;

import com.google.zxing.client.j2se.MatrixToImageWriter;

import com.google.zxing.common.BitMatrix;

import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;

//生成二维码

public class creatQRcode {

public static  void main(String[] args){

//定义二维码的宽度和高度

int width=300;

int height=300;

String format="png";//指定图片的格式为"png"

String content="rainbow,you must be happy evey day";//定义二维码的内容

//定义二维码的参数

HashMap hints=new HashMap();

hints.put(EncodeHintType.CHARACTER_SET,"utf-8");

hints.put(EncodeHintType.ERROR_CORRECTION,ErrorCorrectionLevel.H);

        //设置容错等级，二维码纠错等级为H级，容错等级越高，容量约小

hints.put(EncodeHintType.MARGIN,5);

        //边框距离为5

//生成二维码

try{

  BitMatrix bitMatrix = new MultiFormatWriter().encode(content,BarcodeFormat.QR_CODE,width,height,hints);

  Path file = new File("D:/code/1.png").toPath();//设置保存路径

  MatrixToImageWriter.writeToPath(bitMatrix, format,file);//输出图像

} 

catch (Exception e) {e.printStackTrace();

}

}

}