数组练习

package day2;
//输出格式：【word1#word2#word3】;//
public class d2 {
    public static void main(String[] args) {
        int []array={1,2,3};
        String str=form(array);
        System.out.println(str);
    }
    public static  String form(int []a)
    {
        String str="[";
        for(int i=0;i<a.length;i++)
        {
            if(i==a.length-1)
            {
               str=str+"word"+a[i]+"]";
            }
            else
            {
                str=str+"word"+a[i]+"#";
            }
        }
        return str;
    }
}

package day2;
import java.util.Scanner;
public class d3 {
    public static void main(String[] args) {
        Scanner sr = new Scanner(System.in);
        System.out.println("请输入字符串：");
        String str = sr.next();
        int countu = 0;
        int countl = 0;
        int countn = 0;
        int counto = 0;
        char[] arr = str.toCharArray();
        for (int i = 0; i < arr.length; i++) {
            char ch = arr[i];
            if (ch >= 'A' && ch <= 'Z') {
                countu++;
            } else {
                if (ch >= 'a' && ch <= 'z') {
                    countl++;
                } else {
                    if (ch >= '0' && ch <= '9') {
                        countn++;
                    } else {
                        counto++;
                    }
                }
            }
        }
        System.out.println(countu);
        System.out.println(countl);
        System.out.println(countn);
        System.out.println(counto);
    }
}