java字符串匹配，另种方式对比

public class Checkb {

    public static void main(String[] args){
        String check = new String("dfAdfAdfwdfA15df6");
        String match = new String("A");

       
       int j = 0;
       for(int i = 0;i<check.length();){
           int m = check.indexOf(match, i);
           if(m>=0){
                i = i+m+1;
                j++;
           }
           else break;
       }

        System.out.println("匹配次数为："+(j));

    }

}

//此方法先将字符串转化成数组在一一匹配，比较麻烦

public class Checka {
   
    public static void main(String[] args){

        String ck = new String("dfAdfAdfwdfA15df6");
        String match = new String("f6");

        int sm = 0;//小写字母计数
        int bm = 0;//大写字母计数
        int fc = 0;//非字符数结果
        int k=0;//匹配计数
       
        char ca[] = ck.toCharArray();
        char mt[] = match.toCharArray();
//计数
        for(int i = 0;i<ck.length();i++){
            if(ca[i]>='a'&&ca[i]<='z') sm = sm+1;
            if(ca[i]>='A'&&ca[i]<='Z') bm = bm+1;
            else fc = i+1 - (sm+bm);

        }
//实现匹配
         for(int m = 0;m<ca.length;m++){

            if(ca[m]==mt[0]){
                 int n = 0;
                 int j =m;
                 for(;n<mt.length;n++){
                    if(ca[j]== mt[n]) j++;
                    else break;
                }
                if(n==mt.length) k=k+1;
          
            }
        }
        System.out.println("大写字母个数"+bm+"小写字母个数"+sm+"非字符个数"+fc);
        System.out.println("匹配个数"+k);
    }
}