将文本文件读入数组 [英] Read text file into an array

问题描述

我想将文本文件读入数组。我怎样才能做到这一点？

I want read a text file into an array. How can I do that?

data = new String [lines.size]

我不想在数组中硬编码10。

I don't want to hard code 10 in the array.

BufferedReader bufferedReader = new BufferedReader(new FileReader(myfile));
String []data;
data = new String[10]; // <= how can I do that? data = new String[lines.size]

for (int i=0; i<lines.size(); i++) {
    data[i] = abc.readLine();
    System.out.println(data[i]);
}
abc.close();

推荐答案

使用ArrayList或其他动态数据结构：

Use an ArrayList or an other dynamic datastructure:

BufferedReader abc = new BufferedReader(new FileReader(myfile));
List<String> lines = new ArrayList<String>();

while((String line = abc.readLine()) != null) {
    lines.add(line);
    System.out.println(data);
}
abc.close();

// If you want to convert to a String[]
String[] data = lines.toArray(new String[]{});

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