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public class FirstLetterUppercase {
     
    public static void main(String[] args){
        System.out.println(new FirstLetterUppercase().upperFirstLatter("letter"));
        System.out.println(new FirstLetterUppercase().upperFirstLatter2("letter"));、<br>                    }
   
    /**
     * 方法一
     * @param letter
     * @return
     */
    public String upperFirstLatter(String letter){
        char[] chars = letter.toCharArray();
        if(chars[0]>='a' && chars[0]<='z'){
            chars[0] = (char) (chars[0]-32);
        }
        return new String(chars);
    }
     
    /**
     * 方法二
     * @param letter
     * @return
     */
    public String upperFirstLatter2(String letter){
        return letter.substring(0, 1).toUpperCase()+letter.substring(1);
    }
     
     
}