How to capitalize the first letter of word in a string using Java?

Question

If you only want to capitalize the first letter of a string named input and leave the rest alone:

String output = input.substring(0, 1).toUpperCase() + input.substring(1);

Now output will have what you want. Check that your input is at least one character long before using this, otherwise you'll get an exception.

public String capitalizeFirstLetter(String original) {
    if (original == null || original.length() == 0) {
        return original;
    }
    return original.substring(0, 1).toUpperCase() + original.substring(1);
}

Just... a complete solution, I see it kind of just ended up combining what everyone else ended up posting =P.

Simplest way is to use org.apache.commons.lang.StringUtils class

StringUtils.capitalize(Str);

Also, There is org.springframework.util.StringUtils in Spring Framework:

StringUtils.capitalize(str);

StringUtils.capitalize(str)

from apache commons-lang.

String sentence = "ToDAY   WeAthEr   GREat";    
public static String upperCaseWords(String sentence) {
        String words[] = sentence.replaceAll("\\s+", " ").trim().split(" ");
        String newSentence = "";
        for (String word : words) {
            for (int i = 0; i < word.length(); i++)
                newSentence = newSentence + ((i == 0) ? word.substring(i, i + 1).toUpperCase(): 
                    (i != word.length() - 1) ? word.substring(i, i + 1).toLowerCase() : word.substring(i, i + 1).toLowerCase().toLowerCase() + " ");
        }

        return newSentence;
    }
//Today Weather Great

String s=t.getText().trim();
int l=s.length();
char c=Character.toUpperCase(s.charAt(0));
s=c+s.substring(1);
for(int i=1; i<l; i++)
    {
        if(s.charAt(i)==' ')
        {
            c=Character.toUpperCase(s.charAt(i+1));
            s=s.substring(0, i) + c + s.substring(i+2);
        }
    }
    t.setText(s);