博客

    public static void main(String[] args) {
        int prefix=0;
        int endfix=0;
        String string="peter piper picked a peck of pickled peppers";
        String[] arrStr = string.split(" ");
        for(int i=0;i<arrStr.length;i++){
            if(arrStr[i].startsWith("p")){prefix++;}
            if (arrStr[i].endsWith("r")) {endfix++;}
        }
        System.out.println("以p为开头的字符串个数为"+prefix+"以r为结尾的字符串个数为"+endfix);
    }

JAVA判断字符串以某个字母为开头，此处判断以字符串“p”开头以“r”结尾