救救孩子吧 搞不懂这题 图1和图3

Question

 

Answer 1

import java.util.Scanner;

public class 字符串字符范围 {

	public static void main(String[] args) {
		String str="";
		
		Scanner input = new Scanner(System.in);
		str = input.next();
		int number=0,letter=0,other=0,space=0;
		for(int i=0;i<str.length();i++) {
			
			if(str.charAt(i) >='0' && str.charAt(i)<='9') {
				number++;
			}else if((str.charAt(i) >='a' && str.charAt(i)<='z') || str.charAt(i) >='A' && str.charAt(i)<='Z') {
				letter++;
			}else if(str.charAt(i) == ' ') {
				space++;
			}else {
				other++;
			}
		}
		System.out.println("数字个数："+number);
		System.out.println("字母个数："+letter);
		System.out.println("空格个数："+space);
		System.out.println("其他字符个数："+other);
	}
}