java - 将句子中的单个单词大写

Question

我需要它做的就是将每行搜索到的单词大写，所以我已经有了`

    File myFile = new File("AliceInWonderland.txt");
    Scanner scan = new Scanner(myFile);
    Scanner uInput = new Scanner(System.in);
    String word;
    int count = 0;

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

        System.out.println("Select the word that you would like to search for, from the book of alice and wonderland: ");
        word = uInput.next();


    while(scan.hasNext()){
        Alice.add(scan.nextLine());
    }

    for(int i = 0;i <= Alice.size();i++){
        if(Alice.get(i).contains(word)){
            System.out.println(Alice.get(i));
            count++;
        }
        else{
            System.out.println(Alice.get(i));
        }
    }` 

我可以写 System.out.println(Alice.get(i).ToUpper); 但这会将其中搜索到的单词的所有行大写，我想做的就是突出显示搜索词

Answer 1

这是一种将字符串中的单词大写的方法:

private static String capWord(String s, String w) {
    int k = s.indexOf(w);
    if (k < 0)
        return s;
    return s.substring(0, k) + w.toUpper() + s.substring(k + w.length());
}

在这里使用它:

System.out.println(capWord(Alice.get(i), word));