Capitalize only the First Letter in a String java

Question

I have been using apache WordUtils to capitalize every first letter in a String, but I need only the first letter of certain words to be capitalized and not all of them. Here is what I have:

import org.apache.commons.lang.WordUtils;

public class FirstCapitalLetter {


    public static void main(String[] args) {
        String str = "STATEMENT OF ACCOUNT FOR THE PERIOD OF";
        str = WordUtils.capitalizeFully(str);
        System.out.println(str);

    }
}

My Output is:

Statement Of Account For The Period Of

I want my output to be

Statement of Account for the Period of

How can I achieve this?

Answer 1

1) Create a set of String you do not want to capitalize (a set of exceptions):

Set<String> doNotCapitalize = new HashSet<>();
doNotCapitalize.add("the");
doNotCapitalize.add("of");
doNotCapitalize.add("for");
...

2) Split the string by spaces

String[] words = "STATEMENT OF ACCOUNT FOR THE PERIOD OF".split(" ");

3) Iterate through the array, capitalizing only those words that are not in the set of exceptions:

StringBuilder builder = new StringBuilder();
for(String word : words){
    String lower = word.toLowerCase();
    if(doNotCapitalize.contains(lower){
          builder.append(lower).append(" ");
    }
    else{
          builder.append(WordUtils.capitalizeFully(lower)).append(" ");
    }
 }
 String finalString = builder.toString();

Answer 2

仅当字符串的长度大于3时，才对字符串中的每个单词运行WordUtils.capitalizeFully，这在此特定情况下有效

Answer 3

U need to break the string in three parts
1. Statement of
2. Account for the
3. Period of.