阅读文本文件：错误 - 变了型的FileWriter

import java.io.*; 
import java.util.*; 

class Permutation { 
    static void combinationUtil(int arr[], int n, int r, FileWriter out, int index,int data[], int i) 
    { 
     if (index == r) 
     { 
      for (int j=0; j<r; j++) 
       out.print(data[j]+" "); 
       out.println(" "); 

     return; 
     } 


     if (i >= n) 
     return; 


     data[index] = arr[i]; 
     combinationUtil(arr, n, r, out, index+1, data, i+1); 
     combinationUtil(arr, n, r, out, index, data, i+1);  
    } 


    static void printCombination(int arr[], int n, int r, FileWriter out) 
    { 

     int data[]=new int[r]; 
     combinationUtil(arr, n, r,out, 0, data, 0); 
    } 


    public static void main (String[] args) { 
     File file = new File("output.txt"); 
     file.createNewFile(); 
     FileWriter out = new FileWriter(file); 
     int arr[] = {1, 2, 3, 4, 5, 6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28}; 
     int r = 6; 
     int n = arr.length; 
     printCombination(arr, n, r, out); 
     out.flush(); 
     out.close(); 
    }//end main 
}//end calss

错误阅读文本文件：错误 - 变了型的FileWriter

C:\Users\Student\Documents\Permutation.java:21: error: cannot find symbol out.print(data[j]+" "); ^ symbol: method print(String) location: variable out of type FileWriter 1 error

过程完成。有问题可以纠正此错误帮助。我尝试使用单独的函数传递它，但它没有工作。

来源

2017-07-27 user8377612