如何存取权限在java中

Question

其他类的方法，我有两个类：

1. 类actUI

公共类ActUI扩展javax.swing.JFrame中{

//有这里的其他类

 private static void writeToFile(java.util.List list, String path) { 
      BufferedWriter out = null; 
      try { 
        File file = new File(path); 
        out = new BufferedWriter(new FileWriter(file, true)); 
        for (Object s : list) { 
          out.write((String) s); 
          out.newLine(); 

        } 
        out.close(); 
      } catch (IOException e) { 
      } 
     UniqueLineReader ULR = new UniqueLineReader(); 
     ULR.setFileName(path); 
    } 

    //there are the other classes here 

} 

类UniqueLineReader：

公共类UniqueLineReader延伸的BufferedReader {

Set<String> lines = new HashSet<String>(); 
private Reader arg0; 

public UniqueLineReader(Reader arg0) { 
    super(arg0); 
} 

@Override 
public String readLine() throws IOException { 
    String uniqueLine; 
    while (lines.add(uniqueLine = super.readLine()) == false); //read until encountering a unique line 
     return uniqueLine; 
} 

public void setFileName(String filePath){ 
    try { 
     // Open the file that is the first 
     // command line parameter 
     FileInputStream fstream = new FileInputStream("test.txt"); 
     UniqueLineReader br = new UniqueLineReader(new InputStreamReader(fstream)); 
     String strLine; 
     // Read File Line By Line 
     PrintWriter outFile2 = new PrintWriter(new File("result.txt")); 
     String result  = ""; 
     List data = new ArrayList(); 
     while ((strLine = br.readLine()) != null) { 
      // Print the content on the console 
      System.out.println(strLine); 
      data.add(strLine); 
     } 
     writeToFile(data, "result.txt"); 
     // Close the input stream 
     //in.close(); 
    } catch (Exception e) {// Catch exception if any 
     System.err.println("Error: " + e.getMessage()); 
    } 
}  

}

我想从将writeToFile方法存取权限UniqueLineReader在actUI中，但我的代码不工作，我怎么能没有错误呢，请帮助我。

Answer 1

看看你的代码。

UniqueLineReader ULR = new UniqueLineReader(); // invalid constructor 
ULR.setFileName(path); 

这里没有匹配的构造函数。如果你想从ActUI访问writeToFile()，只要改变的writeToFile()访问修饰符公共现在你可以使用以下

UniqueLineReader.writeToFile(new ArrayList(), path);