另外，Spring Framework中还有org.springframework.util.StringUtils:

StringUtils.capitalize(str);

另外，Spring Framework中还有org.springframework.util.StringUtils:

StringUtils.capitalize(str);

用这个:

char[] chars = {Character.toUpperCase(A.charAt(0)), 
Character.toUpperCase(B.charAt(0))};
String a1 = chars[0] + A.substring(1);
String b1 = chars[1] + B.substring(1);

不管你的inputString的值是多少，下面将给你相同的一致输出:

if(StringUtils.isNotBlank(inputString)) {
    inputString = StringUtils.capitalize(inputString.toLowerCase());
}

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);