java - 如何在java中将每个由空格分隔的字符串的第一个字母大写

Question

好的，我已经写好了代码并解决了。我的问题是，当我在同一行输入两个单词时，我会得到我输入的内容以及我想要的解决方案的输出。

我得到这个输出。

我想要这个输出......周四快乐

                             Happy Thursday

下面是我的代码:

import java.util.Scanner;

public class LetterCapitalize {

    String CapitalizeLetter(String str) {

        String[] words = str.split(" ");
        String string = " ";

        for(int i = 0; i < words.length; i++){
            char letter = Character.toUpperCase(words[i].charAt(0));
            string = " " + letter+ words[i].substring(1);
            str += string;
        }
        return str;
    }

    public static void main(String[] args) {
         Scanner  s = new Scanner(System.in);
         LetterCapitalize c = new LetterCapitalize();
         System.out.print(c. CapitalizeLetter(s.nextLine())); 
    }
}

Answer 1

以下方法可以修复它。将 str 重新初始化为空字符串。

  import java.util.Scanner;

 public class LetterCapitalize {

    String CapitalizeLetter(String str) {

    String[] words = str.split(" ");
    String string = " ";
   //re initialize to empty string
    str="";
    for(int i = 0; i < words.length; i++){
        char letter = Character.toUpperCase(words[i].charAt(0));
        string = " " + letter+ words[i].substring(1);
        str += string;
    }
    return str;
}

public static void main(String[] args) {
    Scanner  s = new Scanner(System.in);
     LetterCapitalize c = new LetterCapitalize();
     System.out.print(c. CapitalizeLetter(s.nextLine()));
}
   }