java newbie : reading in a file for word search code. .add() 和 .toArray() 给我错误

Question

我真的很想找出这段代码有什么问题。 .add() 和 .toArray() 下面有红线。除了写这两行之外，还有其他方法吗？我做错了什么？

package prog3;

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.*;

public class WordList {

    private String filename;
    private Word[] words;

    public WordList(String fileName) {
        this.filename = fileName;
    }

    //reads in list of words and stores them internally. line by line 
    //if method reas list of words successfully, then it returns as true, otherwise false

    public boolean readFile() {

        try{
            BufferedReader read;
            read = new BufferedReader(new FileReader(filename));
            String nextLine;
            while ((nextLine = read.readLine())!= null) {
                nextLine = nextLine.trim();
                read.add(new Word(nextLine));
            }

            words = read.toArray(new Word[0]);
        }catch(IOException ex){
            System.out.println("Caught exception: " +ex.getMessage());
            return false;
        }
        return true;
    }

//getList is supposed to return the list of words as an array of class Word. How do I do this???

public Word[] getList() {

    }
} 

Answer 1

您正在 BufferedReader 上调用 add(，这是不可能的。

相反，创建一个数组列表:

ArrayList<String> list=new ArrayList<>();

然后添加:

list.add(read.readLine());

完成后，使用列表调用 toArray。

我不会使用 Word 类，因为我们处理的是文本行，而不是单词。