Question

我想通过缓冲读取器将文件（game-words.txt）读入字符串的ArrayList中。我已经设置了缓冲读取器来从game-words.txt读入，现在我只需要弄清楚如何将它存储在ArrayList中。在此先感谢您的帮助和耐心！以下是我到目前为止的情况：

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOExecption;

class Dictionary{
     String [] words; // or you can use an ArrayList
     int numwords;

    // constructor: read words from a file
    public Dictionary(String filename){ }
    BufferedReader br  = null;
    String line;

    try {

        br = new BufferedReader(new FileReader("game-words.txt"));

    while ((line = br.readLine()) != null){
            System.out.println(line);
    }
    } catch (IOExecption e) {

        e.printStackTrace();
    }

}

Answer 1

将字符串读入数组：

自动：

List<String> strings = Files.readAllLines(Path);

手册：

List<String> strings = new ArrayList<>();
while ((line = br.readLine()) != null){
            strings.add(line);
    }

将行拆分为单词（如果一行包含多个单词）：

for(String s : strings) {
    String[] words = s.split(" "); //if words in line are separated by space
}

Answer 2

是的，您可以使用arrayList存储要添加的单词。您只需使用以下命令对文件进行反序列化即可。

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

public void deserializeFile(){
    try{
        BufferedReader br = new BufferedReader(new FileReader("file_name.txt"));
        String line = null; 
        while ((line = br.readLine()) != null) {
            // assuming your file has words separated by space
            String ar[] = line.split(" ");
            Collections.addAll(pList, ar);
        }
    }
    catch (Exception ex){
        ex.printStackTrace();
    }
}

Answer 3

这也可能有用：

class Dictionary{
 ArrayList<String> words = new ArrayList<String>(); // or you can use an ArrayList
 int numwords;String filename;

// constructor: read words from a file
public Dictionary(String filename){ 
     this.filename =filename;
 }
BufferedReader br  = null;
String line;

try {

    br = new BufferedReader(new FileReader("game-words.txt"));

while ((line = br.readLine()) != null){
        words.add(line.trim());
}
} catch (IOExecption e) {

    e.printStackTrace();
}

}

我使用了trim，它会删除单词中的前导和尾随空格（如果有的话）。如果你想将文件名作为参数传递，请使用Filereader中的filename变量作为参数。

Java读取字符串的ArrayList

3 个答案: