Question

我有两个班级：

class actUI

公共类ActUI扩展了javax.swing.JFrame {

//这里还有其他类

      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

}

Class UniqueLineReader：

公共类UniqueLineReader扩展了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actUI中的writeToFile方法访问UniqueLineReader，但是我的代码无法正常工作，我怎么能没有错误呢？请帮帮我。

Answer 1

看看你的代码。

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

没有匹配的构造函数。如果您想从writeToFile()访问ActUI，只需将writeToFile()的访问修饰符更改为公开，现在您可以使用以下

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

如何在java中访问其他类方法

1 个答案: