Java - 从文本文件中读取不同行上的单词 [英] Java - read words on different lines from a text file

问题描述

您好，请告诉我这是否是我正在使用的正确代码。假设我有一个文本文件，单独的行上有单词和提示：

1个单词

提示第一个单词

2个单词

暗示第二个单词......依此类推

我想在不同的行上为用户显示一个单词和提示。我可以用这个：



ArrayList< string> ;; words = new ArrayList< string>（）;

ArrayList< string> ;; hints = new ArrayList< string>（）;

尝试{

文件f =新文件（filename.txt）;

扫描仪fSc =新扫描仪（f）;



while（fSc.hasNextLine（））{

String line = input.readLine（）;

char [] words = line.split（）;

words.add（str [0]）;

hints.add（str [1]）;

}

fSc.close（）;

} catch（Exception ex）

{

System.out.println（ex）;

}



谢谢！

Hello, please let me know if that's the right code I am working with. Assume I have a text file with words and hints on separate lines:
1 word
hint for the first word
2 word
hint for the second word ...and so on
I want to display a word and a hint for the user on different lines. Can I use this:

ArrayList<string>; words = new ArrayList<string>();
ArrayList<string>; hints = new ArrayList<string>();
try{
File f = new File("filename.txt");
Scanner fSc = new Scanner(f);

while (fSc.hasNextLine()) {
String line = input.readLine();
char [] words = line.split();
words.add(str[0]);
hints.add(str[1]);
}
fSc.close();
}catch(Exception ex)
{
System.out.println(ex);
}

Thank you!

推荐答案

ArrayList; words = new ArrayList();

在 ArrayList <之后删除分号/ code>。



Remove the semi-colon after ArrayList.

while (fSc.hasNextLine()) { 
    String line = input.readLine(); 
    char [] words = line.split(); 
    words.add(str[0]);
    hints.add(str[1]); 
} 

这看起来不对。您为行拆分使用名称 words ，但随后添加 str 。您还将错误的项添加到数组中。它应该是这样的：

That does not look right. You use the name words for your line split, but then add str. You are also adding the wrong items into your arrays. It should be something like:

while (fSc.hasNextLine()) { 
    String line = input.readLine(); 
    String[] str = line.split(); 
    words.add(str[1]);
    String line = input.readLine();
    hints.add(line); 
}

将来在发布问题之前总是值得编译和测试你的代码。

In future it is always worth compiling and testing your code before posting your question.

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