java - 如何在java中将字符串中每个单词的第一个和最后一个字母大写

Question

如何将字符串中每个单词的第一个和最后一个字母大写

我是这样做的-

    String cap = "";
    for (int i = 0; i < sent.length() - 1; i++)
    {
        if (sent.charAt(i + 1) == ' ')
        {
            cap += Character.toUpperCase(sent.charAt(i)) + " " + Character.toUpperCase(sent.charAt(i + 2));
            i += 2;
        }
        else
            cap += sent.charAt(i);
    }
    cap += Character.toUpperCase(sent.charAt(sent.length() - 1));
    System.out.print (cap);

当第一个单词超过单个字符时，它不起作用

我是初学者，请使用简单的函数

Answer 1

使用 apache commons lang library它变得非常容易做到:

    String testString = "this string is needed to be 1st and 2nd letter-uppercased for each word";

    testString = WordUtils.capitalize(testString);
    testString = StringUtils.reverse(testString);
    testString = WordUtils.capitalize(testString);
    testString = StringUtils.reverse(testString);
    System.out.println(testString);

ThiS StrinG IS NeedeD TO BE 1sT AnD 2nD Letter-uppercaseD FoR EacH WorD