java中字符串查找一个字符串的个数几种方法_JAVA_编程开发_程序员俱乐部

方法1
public static void main(String[] args) {
    String s = "asdfasdfasdfjaskdfjaksfjasdnbasdfsdanbakdjfkldsjfnba";
    int y = 0;
    while (s.indexOf("nba")!=-1){
        y++;
        s = s.substring(s.indexOf("nba")+4);
    }
    System.out.println(y);
}
方法2
public static void main(String[] args) {
        String s = "asdfasdfasdfjaskdfjaksfjasdnbasdfsdanbakdjfkldsjfnba";
        Pattern p=Pattern.compile("nba");
        Matcher m=p.matcher(s);
        int count = 0;
        while(m.find()) {
            count++;
        }
        System.out.println(count);
    }