将字符串转换为标题案例 [英] Convert String into Title Case

问题描述

我是Java的初学者，试图编写一个程序来将字符串转换为标题大小写。例如，如果 String s =my name is milind，那么输出应为我的名字是Milind。

I am a beginner in Java trying to write a program to convert strings into title case. For example, if String s = "my name is milind", then the output should be "My Name Is Milind".

import java.util.*;
class TitleCase
{
public static void main(String args[])
{
    Scanner in = new Scanner(System.in);
    System.out.println("ent");

    String s=in.nextLine();
    String str ="";        
    char a ;

    for(int i =0;i<s.length()-1;i++)
    {
        a = s.charAt(i);
        if(a==' ')
        {
            str = str+(Character.toUpperCase(s.charAt(i+1)));
        }
        else
        {
            str =str+(Character.toLowerCase(a));
        }

    }

    //for(int i =0; i<s.length();i++)
    //{
        System.out.println(str);
    //}
}
}

推荐答案

您正在尝试将输入的每个单词都大写。
所以你必须执行以下步骤：

You are trying to capitalize every word of the input. So you have to do following steps:

1. 将单词分开


2. capitalize每个单词


3. 把它们放在一起


4. 打印出来

1. get the words separated
2. capitalize each word
3. put it all together
4. print it out

示例代码：

  public static void main(String args[]){
     Scanner in = new Scanner(System.in);
     System.out.println("ent");

     String s=in.nextLine();

     //now your input string is storred inside s.
     //next we have to separate the words.
     //here i am using the split method (split on each space);
     String[] words = s.split(" ");

     //next step is to do the capitalizing for each word
     //so use a loop to itarate through the array
     for(int i = 0; i< words.length; i++){
        //we will save the capitalized word in the same place again
        //first, geht the character on first position 
        //(words[i].charAt(0))
        //next, convert it to upercase (Character.toUppercase())
        //then add the rest of the word (words[i].substring(1))
        //and store the output back in the array (words[i] = ...)
        words[i] = Character.toUpperCase(words[i].charAt(0)) + 
                  [i].substring(1);
     }

    //now we have to make a string out of the array, for that we have to 
    // seprate the words with a space again
    //you can do this in the same loop, when you are capitalizing the 
    // words!
    String out = "";
    for(int i = 0; i<words.length; i++){
       //append each word to out 
       //and append a space after each word
       out += words[i] + " ";
    }

    //print the result
    System.out.println(out);
 }

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