以代码为什么不能实现显示文件夹下的所有文件和文件夹？？使用了递归

Question

public class hello3 {
    public static void main(String[] args){
        File dir=new File("C:\\Users\\pc\\Desktop\\a");
        outputFile(dir);         
        }
        public static void outputFile(File file){
            File[] aaa=file.listFiles();            
            for(int i=0;i<aaa.length;i++){
                if(aaa[i].isDirectory())
                    {if(aaa[i].length()==0)
                        System.out.println(aaa[i].getName());
                    else
                    outputFile(aaa[i]);}
                else
    System.out.println(aaa[i].getName());       
        }
}
}

Answer 1

if(aaa[i].isDirectory())
{if(aaa[i].length()==0)
System.out.println(aaa[i].getName());
else
outputFile(aaa[i]);}
}

改成
if(aaa[i].isDirectory())
{ outputFile(aaa[i])；

                      else
                              System.out.println(aaa[i].getName()) ;}