【程序7】

题目：输入一行字符，分别统计出其中英文字母、空格、数字和其它字符的个数。

import java.util.*;

public class lianxi07 {

    public static void main(String[] args) {

        int digital = 0;

        int character = 0;

        int other = 0;

        int blank = 0;

        char[] ch = null;

        Scanner sc = new Scanner(System.in);

        String s = sc.nextLine();

        ch = s.toCharArray();

        for(int i=0; i<ch.length; i++) {

            if(ch >= "0" && ch <= "9") {

               digital ++;

            } else if((ch >= "a" && ch <= "z") || ch > "A" && ch <= "Z") {

               character ++;

            } else if(ch == " ") {

               blank ++;

            } else {

               other ++;

            }

        }

        System.out.println("数字个数: " + digital);

        System.out.println("英文字母个数: " + character);

        System.out.println("空格个数: " + blank);

        System.out.println("其他字符个数:" + other );

    }

}